{"id":1924,"date":"2024-10-24T16:17:33","date_gmt":"2024-10-24T14:17:33","guid":{"rendered":"https:\/\/www.compur.com\/?page_id=1924"},"modified":"2025-08-20T18:38:04","modified_gmt":"2025-08-20T16:38:04","slug":"tout-sur-les-detecteurs-de-gaz","status":"publish","type":"page","link":"https:\/\/www.compur.com\/fr\/a-propos-de-nous\/tout-sur-les-detecteurs-de-gaz\/","title":{"rendered":"Tout sur les d\u00e9tecteurs de gaz"},"content":{"rendered":"<style>.kb-row-layout-id303_c6f928-8f > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id303_c6f928-8f > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id303_c6f928-8f > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);max-width:var( --global-content-width, 1290px );padding-left:var(--global-content-edge-padding);padding-right:var(--global-content-edge-padding);grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id303_c6f928-8f{border-top:0px solid var(--global-palette1, #3182CE);border-right:0px solid var(--global-palette1, #3182CE);border-bottom:0px solid var(--global-palette1, #3182CE);border-left:0px solid var(--global-palette1, #3182CE);}.kb-row-layout-id303_c6f928-8f > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-id303_c6f928-8f > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 1024px){.kb-row-layout-id303_c6f928-8f{border-top:0px solid var(--global-palette1, #3182CE);border-right:0px solid var(--global-palette1, #3182CE);border-bottom:0px solid var(--global-palette1, #3182CE);border-left:0px solid var(--global-palette1, #3182CE);}}@media all and (max-width: 767px){.kb-row-layout-id303_c6f928-8f > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id303_c6f928-8f{border-top:0px solid var(--global-palette1, #3182CE);border-right:0px solid var(--global-palette1, #3182CE);border-bottom:0px solid var(--global-palette1, #3182CE);border-left:0px solid var(--global-palette1, #3182CE);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id303_c6f928-8f alignnone breadcrumb-rm wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-1-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top kt-inner-column-height-full kb-theme-content-width\">\n<style>.kadence-column303_05f108-35 > .kt-inside-inner-col{padding-bottom:var(--global-kb-spacing-xs, 1rem);}.kadence-column303_05f108-35 > .kt-inside-inner-col{border-top:0px solid var(--global-palette6, #718096);border-right:0px solid var(--global-palette6, #718096);border-bottom:0px solid var(--global-palette6, #718096);border-left:0px solid var(--global-palette6, #718096);}.kadence-column303_05f108-35 > .kt-inside-inner-col,.kadence-column303_05f108-35 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column303_05f108-35 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column303_05f108-35 > .kt-inside-inner-col{flex-direction:column;}.kadence-column303_05f108-35 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column303_05f108-35 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column303_05f108-35{position:relative;}@media all and (max-width: 1024px){.kadence-column303_05f108-35 > .kt-inside-inner-col{border-top:0px solid var(--global-palette6, #718096);border-right:0px solid var(--global-palette6, #718096);border-bottom:0px solid var(--global-palette6, #718096);border-left:0px solid var(--global-palette6, #718096);flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column303_05f108-35 > .kt-inside-inner-col{border-top:0px solid var(--global-palette6, #718096);border-right:0px solid var(--global-palette6, #718096);border-bottom:0px solid var(--global-palette6, #718096);border-left:0px solid var(--global-palette6, #718096);flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column303_05f108-35\"><div class=\"kt-inside-inner-col\">\n<p class=\"has-text-align-center eplus-wrapper\"><nav aria-label=\"breadcrumbs\" class=\"rank-math-breadcrumb\"><p><span class=\"label\">Vous \u00eates ici :<\/span> <span class=\"last\">Home<\/span><\/p><\/nav><\/p>\n<\/div><\/div>\n\n<\/div><\/div>\n\n<style>.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id1924_2e9b3a-f0{margin-top:var(--global-kb-spacing-xxl, 5rem);margin-bottom:var(--global-kb-spacing-xxl, 5rem);}.kb-row-layout-id1924_2e9b3a-f0 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id1924_2e9b3a-f0 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id1924_2e9b3a-f0 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);max-width:var( --global-content-width, 1290px );padding-left:var(--global-content-edge-padding);padding-right:var(--global-content-edge-padding);grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id1924_2e9b3a-f0{border-top:0px solid var(--global-palette1, #3182CE);border-right:0px solid var(--global-palette1, #3182CE);border-bottom:0px solid var(--global-palette1, #3182CE);border-left:0px solid var(--global-palette1, #3182CE);}.kb-row-layout-id1924_2e9b3a-f0 > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id1924_2e9b3a-f0{margin-top:var(--global-kb-spacing-xl, 4rem);margin-bottom:var(--global-kb-spacing-xl, 4rem);}}@media all and (max-width: 1024px){.kb-row-layout-id1924_2e9b3a-f0 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 1024px){.kb-row-layout-id1924_2e9b3a-f0{border-top:0px solid var(--global-palette1, #3182CE);border-right:0px solid var(--global-palette1, #3182CE);border-bottom:0px solid var(--global-palette1, #3182CE);border-left:0px solid var(--global-palette1, #3182CE);}}@media all and (max-width: 767px){.kb-row-layout-id1924_2e9b3a-f0 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id1924_2e9b3a-f0{border-top:0px solid var(--global-palette1, #3182CE);border-right:0px solid var(--global-palette1, #3182CE);border-bottom:0px solid var(--global-palette1, #3182CE);border-left:0px solid var(--global-palette1, #3182CE);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id1924_2e9b3a-f0 alignnone wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-1-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top kt-inner-column-height-full kb-theme-content-width\">\n<style>.kadence-column1924_448347-ec > .kt-inside-inner-col,.kadence-column1924_448347-ec > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column1924_448347-ec > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column1924_448347-ec > .kt-inside-inner-col{flex-direction:column;}.kadence-column1924_448347-ec > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column1924_448347-ec > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column1924_448347-ec{position:relative;}@media all and (max-width: 1024px){.kadence-column1924_448347-ec > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column1924_448347-ec > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column1924_448347-ec\"><div class=\"kt-inside-inner-col\">\n<h1 class=\"wp-block-heading has-text-align-center no-headerimg eplus-wrapper\">Tout sur les d\u00e9tecteurs de gaz<\/h1>\n\n\n\n<p class=\"has-text-align-center eplus-wrapper\">D\u00e9couvrez tout ce qu&rsquo;il faut savoir sur les appareils de mesure de gaz et leur fonctionnement.<\/p>\n\n\n<style>.wp-block-kadence-advancedbtn.kb-btns1924_d7439e-f0{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:center;align-items:center;}.kt-btns1924_d7439e-f0 .kt-button{font-weight:normal;font-style:normal;}.kt-btns1924_d7439e-f0 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns1924_d7439e-f0 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns1924_d7439e-f0 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns1924_d7439e-f0 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns1924_d7439e-f0 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns1924_d7439e-f0 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns1924_d7439e-f0 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns1924_d7439e-f0\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn1924_15f25d-4d.kb-button{width:initial;}.wp-block-kadence-advancedbtn .kb-btn1924_15f25d-4d.kb-button{color:var(--global-palette9, #ffffff);background:var(--global-palette1, #3182CE);font-size:var(--global-kb-font-size-md, 1.25rem);font-family:var( --global-body-font-family, inherit );font-weight:700;border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.wp-block-kadence-advancedbtn .kb-btn1924_15f25d-4d.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn1924_15f25d-4d.kb-button:focus{color:var(--global-palette3, #1A202C);background:var(--global-palette2, #2B6CB0);}<\/style><a class=\"kb-button kt-button button kb-btn1924_15f25d-4d kt-btn-size-standard kt-btn-width-type-auto kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"#kontakt\"><span class=\"kt-btn-inner-text\">Demandez conseil maintenant sans engagement<\/span><\/a><\/div>\n<\/div><\/div>\n\n<\/div><\/div>\n\n<style>.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id1924_911aca-0f{margin-top:var(--global-kb-spacing-xxl, 5rem);margin-bottom:var(--global-kb-spacing-xxl, 5rem);}.kb-row-layout-id1924_911aca-0f > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id1924_911aca-0f > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id1924_911aca-0f > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);max-width:var( --global-content-width, 1290px );padding-left:var(--global-content-edge-padding);padding-right:var(--global-content-edge-padding);grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id1924_911aca-0f{border-top:0px solid var(--global-palette1, #3182CE);border-right:0px solid var(--global-palette1, #3182CE);border-bottom:0px solid var(--global-palette1, #3182CE);border-left:0px solid var(--global-palette1, #3182CE);}.kb-row-layout-id1924_911aca-0f > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id1924_911aca-0f{margin-top:var(--global-kb-spacing-xl, 4rem);margin-bottom:var(--global-kb-spacing-xl, 4rem);}}@media all and (max-width: 1024px){.kb-row-layout-id1924_911aca-0f > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 1024px){.kb-row-layout-id1924_911aca-0f{border-top:0px solid var(--global-palette1, #3182CE);border-right:0px solid var(--global-palette1, #3182CE);border-bottom:0px solid var(--global-palette1, #3182CE);border-left:0px solid var(--global-palette1, #3182CE);}}@media all and (max-width: 767px){.kb-row-layout-id1924_911aca-0f > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id1924_911aca-0f{border-top:0px solid var(--global-palette1, #3182CE);border-right:0px solid var(--global-palette1, #3182CE);border-bottom:0px solid var(--global-palette1, #3182CE);border-left:0px solid var(--global-palette1, #3182CE);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id1924_911aca-0f alignnone wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-1-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top kt-inner-column-height-full kb-theme-content-width\">\n<style>.kadence-column1924_5537a0-eb > .kt-inside-inner-col{padding-top:var(--global-kb-spacing-md, 2rem);padding-right:var(--global-kb-spacing-md, 2rem);padding-bottom:var(--global-kb-spacing-md, 2rem);padding-left:var(--global-kb-spacing-md, 2rem);}.kadence-column1924_5537a0-eb > .kt-inside-inner-col,.kadence-column1924_5537a0-eb > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column1924_5537a0-eb > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column1924_5537a0-eb > .kt-inside-inner-col{flex-direction:column;}.kadence-column1924_5537a0-eb > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column1924_5537a0-eb > .kt-inside-inner-col{background-color:var(--global-palette8, #F7FAFC);}.kadence-column1924_5537a0-eb > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column1924_5537a0-eb{position:relative;}@media all and (max-width: 1024px){.kadence-column1924_5537a0-eb > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column1924_5537a0-eb > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column1924_5537a0-eb\"><div class=\"kt-inside-inner-col\">\t\t\t\t<div class=\"wp-block-uagb-table-of-contents uagb-toc__align-left uagb-toc__columns-1  uagb-block-5c2293f3 index-self     \"\n\t\t\t\t\tdata-scroll= \"1\"\n\t\t\t\t\tdata-offset= \"30\"\n\t\t\t\t\tstyle=\"\"\n\t\t\t\t>\n\t\t\t\t<div class=\"uagb-toc__wrap\">\n\t\t\t\t\t\t<div class=\"uagb-toc__title\">\n\t\t\t\t\t\t\tNavigation rapide:\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"uagb-toc__list-wrap \">\n\t\t\t\t\t\t<ol class=\"uagb-toc__list\"><li class=\"uagb-toc__list\"><a href=\"#pourquoi-a-t-on-besoin-de-d\u00e9tecteurs-de-gaz\" class=\"uagb-toc-link__trigger\">Pourquoi a-t-on besoin de d\u00e9tecteurs de gaz ?<\/a><li class=\"uagb-toc__list\"><a href=\"#1-une-excursion-dans-lhistoire\" class=\"uagb-toc-link__trigger\">1. Une excursion dans l&#039;histoire<\/a><li class=\"uagb-toc__list\"><a href=\"#2-comment-fonctionnent-les-d\u00e9tecteurs-de-gaz-modernes\" class=\"uagb-toc-link__trigger\">2. Comment fonctionnent les d\u00e9tecteurs de gaz modernes ?<\/a><ul class=\"uagb-toc__list\"><li class=\"uagb-toc__list\"><a href=\"#21-mesure-des-gaz-combustibles\" class=\"uagb-toc-link__trigger\">2.1 Mesure des gaz combustibles<\/a><\/li><\/ul><\/li><li class=\"uagb-toc__list\"><a href=\"#3-mesure-des-gaz-toxiques\" class=\"uagb-toc-link__trigger\">3. Mesure des gaz toxiques<\/a><ul class=\"uagb-toc__list\"><li class=\"uagb-toc__list\"><a href=\"#31-capteurs-\u00e9lectrochimiques\" class=\"uagb-toc-link__trigger\">3.1 Capteurs \u00e9lectrochimiques<\/a><li class=\"uagb-toc__list\"><li class=\"uagb-toc__list\"><a href=\"#32-capteurs-pid\" class=\"uagb-toc-link__trigger\">3.2 Capteurs PID<\/a><li class=\"uagb-toc__list\"><li class=\"uagb-toc__list\"><a href=\"#33-capteurs-de-conductivit\u00e9-thermique\" class=\"uagb-toc-link__trigger\">3.3 Capteurs de conductivit\u00e9 thermique<\/a><li class=\"uagb-toc__list\"><li class=\"uagb-toc__list\"><a href=\"#contactez-nous-sans-engagement\" class=\"uagb-toc-link__trigger\">Contactez-nous sans engagement<\/a><\/ul><\/ul><\/ol>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div><\/div>\n\n<\/div><\/div>\n\n<style>.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id1924_91130e-36{margin-top:var(--global-kb-spacing-xxl, 5rem);margin-bottom:var(--global-kb-spacing-xxl, 5rem);}.kb-row-layout-id1924_91130e-36 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id1924_91130e-36 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id1924_91130e-36 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);max-width:var( --global-content-width, 1290px );padding-left:var(--global-content-edge-padding);padding-right:var(--global-content-edge-padding);padding-top:0px;padding-bottom:0px;grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id1924_91130e-36{border-top:0px solid var(--global-palette1, #3182CE);border-right:0px solid var(--global-palette1, #3182CE);border-bottom:0px solid var(--global-palette1, #3182CE);border-left:0px solid var(--global-palette1, #3182CE);}.kb-row-layout-id1924_91130e-36 > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id1924_91130e-36{margin-top:var(--global-kb-spacing-xl, 4rem);margin-bottom:var(--global-kb-spacing-xl, 4rem);}}@media all and (max-width: 1024px){.kb-row-layout-id1924_91130e-36 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 1024px){.kb-row-layout-id1924_91130e-36{border-top:0px solid var(--global-palette1, #3182CE);border-right:0px solid var(--global-palette1, #3182CE);border-bottom:0px solid var(--global-palette1, #3182CE);border-left:0px solid var(--global-palette1, #3182CE);}}@media all and (max-width: 767px){.kb-row-layout-id1924_91130e-36 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id1924_91130e-36{border-top:0px solid var(--global-palette1, #3182CE);border-right:0px solid var(--global-palette1, #3182CE);border-bottom:0px solid var(--global-palette1, #3182CE);border-left:0px solid var(--global-palette1, #3182CE);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id1924_91130e-36 alignnone wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-1-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top kt-inner-column-height-full kb-theme-content-width\">\n<style>.kadence-column1924_0c572c-0d > .kt-inside-inner-col,.kadence-column1924_0c572c-0d > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column1924_0c572c-0d > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column1924_0c572c-0d > .kt-inside-inner-col{flex-direction:column;}.kadence-column1924_0c572c-0d > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column1924_0c572c-0d > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column1924_0c572c-0d{position:relative;}@media all and (max-width: 1024px){.kadence-column1924_0c572c-0d > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column1924_0c572c-0d > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column1924_0c572c-0d\"><div class=\"kt-inside-inner-col\">\n<h2 class=\"wp-block-heading has-text-align-left eplus-wrapper\">Pourquoi a-t-on besoin de d\u00e9tecteurs de gaz ?<\/h2>\n\n\n\n<p>Au cours de l&rsquo;\u00e9volution, l&rsquo;homme s&rsquo;est adapt\u00e9 \u00e0 l&rsquo;atmosph\u00e8re terrestre. L&rsquo;organisme humain fonctionne de mani\u00e8re optimale dans 21 % d&rsquo;oxyg\u00e8ne et 79 % d&rsquo;azote. Les gaz traces ubiquitaires commele CO2 et les gaz rares sont n\u00e9glig\u00e9s. De petites variations dans la composition affectent le bien-\u00eatre, de plus grandes affectent la sant\u00e9 et de tr\u00e8s grandes peuvent \u00eatre mortelles. M\u00eame en tr\u00e8s faibles concentrations, les gaz toxiques peuvent \u00eatre extr\u00eamement nocifs pour la sant\u00e9. On distingue les dangers suivants :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Manque d&rsquo;oxyg\u00e8ne<\/li>\n\n\n\n<li>Pr\u00e9sence de gaz explosifs<\/li>\n\n\n\n<li>Pr\u00e9sence de gaz toxiques<\/li>\n<\/ul>\n\n\n\n<p>Les d\u00e9viations susmentionn\u00e9es peuvent aussi bien se produire dans la nature qu&rsquo;\u00eatre caus\u00e9es par l&rsquo;homme. Dans notre soci\u00e9t\u00e9 industrielle, c&rsquo;est cette derni\u00e8re qui pr\u00e9domine. Les processus de d\u00e9composition, qui produisent \u00e0 la fois des gaz combustibles (m\u00e9thane) et des gaz toxiques (sulfure d&rsquo;hydrog\u00e8ne, dioxyde de carbone, mercaptans et bien d&rsquo;autres), sont des exemples typiques d&rsquo;\u00e9carts naturels. Ces gaz s&rsquo;accumulent volontiers dans les fosses ou les d\u00e9pressions. Un accident typique est celui dit de la fosse \u00e0 purin : quelqu&rsquo;un s&rsquo;approche trop pr\u00e8s d&rsquo;une fosse \u00e0 purin, inhale du sulfure d&rsquo;hydrog\u00e8ne, qui provoque une paralysie respiratoire. L&rsquo;accident\u00e9 tombe dans la fosse et se noie ou s&rsquo;asphyxie. Les personnes qui tentent de lui venir en aide subissent le m\u00eame sort.<\/p>\n\n\n\n<p>Pourtant, il n&rsquo;est pas courant d&rsquo;avoir des d\u00e9tecteurs de gaz dans les exploitations agricoles. Il en va tout autrement dans les entreprises de traitement des eaux us\u00e9es. Des processus de fermentation similaires ont lieu dans leurs bassins. L&rsquo;arriv\u00e9e au niveau des d\u00e9grilleurs est d\u00e9j\u00e0 surveill\u00e9e \u00e0 l&rsquo;aide d&rsquo;une technique de mesure stationnaire pour d\u00e9tecter la pr\u00e9sence de gaz inflammables. Les eaux us\u00e9es qui arrivent pourraient en effet d\u00e9j\u00e0 \u00e9mettre du m\u00e9thane ou transporter des carburants ou des solvants. Dans les zones de travail, les employ\u00e9s sont \u00e9quip\u00e9s d&rsquo;appareils qui peuvent m\u00eame d\u00e9tecter plusieurs gaz. Typiquement, ils mesurent les gaz inflammables, le manque d&rsquo;oxyg\u00e8ne, le dioxyde de carbone et le sulfure d&rsquo;hydrog\u00e8ne.<\/p>\n\n\n<style>.wp-block-kadence-advancedbtn.kb-btns1924_ad9f57-62{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:flex-start;align-items:center;}.kt-btns1924_ad9f57-62 .kt-button{font-weight:normal;font-style:normal;}.kt-btns1924_ad9f57-62 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns1924_ad9f57-62 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns1924_ad9f57-62 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns1924_ad9f57-62 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns1924_ad9f57-62 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns1924_ad9f57-62 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns1924_ad9f57-62 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns1924_ad9f57-62\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn1924_bd38b6-2f.kb-button{width:initial;}.wp-block-kadence-advancedbtn .kb-btn1924_bd38b6-2f.kb-button{color:var(--global-palette9, #ffffff);background:var(--global-palette1, #3182CE);font-size:var(--global-kb-font-size-md, 1.25rem);font-family:var( --global-body-font-family, inherit );font-weight:700;border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;margin-top:var(--global-kb-spacing-sm, 1.5rem);}.wp-block-kadence-advancedbtn .kb-btn1924_bd38b6-2f.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn1924_bd38b6-2f.kb-button:focus{color:var(--global-palette3, #1A202C);background:var(--global-palette2, #2B6CB0);}<\/style><a class=\"kb-button kt-button button kb-btn1924_bd38b6-2f kt-btn-size-standard kt-btn-width-type-auto kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"#kontakt\"><span class=\"kt-btn-inner-text\">Prendre contact sans engagement<\/span><\/a><\/div>\n<\/div><\/div>\n\n<\/div><\/div>\n\n<style>.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id1924_1882c4-53{margin-top:var(--global-kb-spacing-xxl, 5rem);margin-bottom:var(--global-kb-spacing-xxl, 5rem);}.kb-row-layout-id1924_1882c4-53 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id1924_1882c4-53 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id1924_1882c4-53 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);max-width:var( --global-content-width, 1290px );padding-left:var(--global-content-edge-padding);padding-right:var(--global-content-edge-padding);padding-top:var(--global-kb-spacing-xxl, 5rem);padding-bottom:var(--global-kb-spacing-xxl, 5rem);grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id1924_1882c4-53{border-top:0px solid var(--global-palette1, #3182CE);border-right:0px solid var(--global-palette1, #3182CE);border-bottom:0px solid var(--global-palette1, #3182CE);border-left:0px solid var(--global-palette1, #3182CE);}.kb-row-layout-id1924_1882c4-53 > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id1924_1882c4-53{margin-top:var(--global-kb-spacing-xl, 4rem);margin-bottom:var(--global-kb-spacing-xl, 4rem);}}@media all and (max-width: 1024px){.kb-row-layout-id1924_1882c4-53 > .kt-row-column-wrap{padding-top:var(--global-kb-spacing-xl, 4rem);padding-bottom:var(--global-kb-spacing-xl, 4rem);grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 1024px){.kb-row-layout-id1924_1882c4-53{border-top:0px solid var(--global-palette1, #3182CE);border-right:0px solid var(--global-palette1, #3182CE);border-bottom:0px solid var(--global-palette1, #3182CE);border-left:0px solid var(--global-palette1, #3182CE);}}@media all and (max-width: 767px){.kb-row-layout-id1924_1882c4-53 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id1924_1882c4-53{border-top:0px solid var(--global-palette1, #3182CE);border-right:0px solid var(--global-palette1, #3182CE);border-bottom:0px solid var(--global-palette1, #3182CE);border-left:0px solid var(--global-palette1, #3182CE);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id1924_1882c4-53 alignnone has-theme-palette8-background-color kt-row-has-bg techn-daten wp-block-kadence-rowlayout\" id=\"technische-daten\"><div class=\"kt-row-column-wrap kt-has-1-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top kt-inner-column-height-full kb-theme-content-width\">\n<style>.kadence-column1924_988158-34 > .kt-inside-inner-col,.kadence-column1924_988158-34 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column1924_988158-34 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column1924_988158-34 > .kt-inside-inner-col{flex-direction:column;}.kadence-column1924_988158-34 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column1924_988158-34 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column1924_988158-34{position:relative;}@media all and (max-width: 1024px){.kadence-column1924_988158-34 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column1924_988158-34 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column1924_988158-34\"><div class=\"kt-inside-inner-col\">\n<h2 class=\"wp-block-heading eplus-wrapper\">1. Une excursion dans l&rsquo;histoire<\/h2>\n\n\n\n<p>On sait depuis l&rsquo;Antiquit\u00e9 que la fermentation alcoolique produit des gaz dangereux. Depuis des temps imm\u00e9moriaux, les viticulteurs placent une bougie au fond de leur cave de fermentation, et si elle s&rsquo;\u00e9teint par manque d&rsquo;oxyg\u00e8ne, ils doivent quitter la cave. Bien s\u00fbr, ils ne pouvaient pas savoir autrefois que le danger venait du dioxyde de carbone. Ils ne savaient pas non plus que le dioxyde de carbone est toxique \u00e0 partir de 0,5 %, mais que la bougie ne s&rsquo;\u00e9teint qu&rsquo;\u00e0 environ 10 %.<\/p>\n\n\n\n<p>Un autre exemple typique de gaz d&rsquo;origine naturelle est l&rsquo;exploitation mini\u00e8re. Ce que l&rsquo;on appelle le \u00ab temps qui bat \u00bb contient du monoxyde de carbone toxique et du m\u00e9thane explosif. Il n&rsquo;est donc pas \u00e9tonnant que ce soit dans l&rsquo;industrie mini\u00e8re que l&rsquo;on ait tent\u00e9 tr\u00e8s t\u00f4t de d\u00e9tecter \u00e0 temps le danger repr\u00e9sent\u00e9 par le gaz. Peu apr\u00e8s la naissance du Christ, on connaissait d\u00e9j\u00e0 les risques pour la sant\u00e9 li\u00e9s \u00e0 l&rsquo;extraction du mercure, par exemple. Un \u00e9crit de Pline l&rsquo;Ancien, datant d&rsquo;environ 100 apr\u00e8s J.-C., en fait \u00e9tat. On essayait en vain de se prot\u00e9ger avec des masques en foug\u00e8re.<\/p>\n\n\n\n<p>Les auteurs ult\u00e9rieurs (1556 Georgius Agricola : \u00ab De Re Metallica \u00bb, vers 1700 et Bernardino Ramazzini : \u00ab De Morbis Artificium Diatribe \u00bb) connaissaient \u00e9galement les dangers du gaz dans l&rsquo;industrie mini\u00e8re. Il n&rsquo;existe toutefois pas de moyen de d\u00e9tecter le gaz. Comme on ne savait pas encore \u00e0 l&rsquo;\u00e9poque ce qu&rsquo;\u00e9tait un gaz, cela aurait \u00e9t\u00e9 difficile. On peut donc en conclure qu&rsquo;il n&rsquo;existait aucun moyen de d\u00e9terminer si l&rsquo;atmosph\u00e8re \u00e9tait dangereuse.<\/p>\n\n\n\n<p>Lorsque la r\u00e9volution industrielle a exig\u00e9 l&rsquo;extraction de toujours plus de charbon, le besoin de mesurer les gaz dangereux s&rsquo;est fait sentir. Il faut dire qu&rsquo;on ne savait pas quelles substances \u00e9taient \u00e0 l&rsquo;origine du danger, mais on connaissait la pr\u00e9sence d&rsquo;un danger diffus.<\/p>\n\n\n\n<p>Pour \u00e9liminer les gaz \u00e9ventuellement dangereux, on a envoy\u00e9 des sp\u00e9cialistes, appel\u00e9s \u00ab\u00a0pompiers\u00a0\u00bb, devant. Le m\u00e9thane inflammable est sp\u00e9cifiquement plus l\u00e9ger que l&rsquo;air et s&rsquo;accumule donc sous le plafond. Les pompiers pla\u00e7aient une bougie juste sous le plafond pour qu&rsquo;elle enflamme le m\u00e9thane. Cette m\u00e9thode \u00e9tait loin d&rsquo;\u00eatre inoffensive. Si une atmosph\u00e8re explosive s&rsquo;\u00e9tait form\u00e9e \u00e0 la place du m\u00e9thane fortement enrichi, les cons\u00e9quences pouvaient \u00eatre fatales. Pompier \u00e9tait un m\u00e9tier tr\u00e8s dangereux.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"765\" src=\"https:\/\/www.compur.com\/wp-content\/uploads\/geschichte-von-gasmessgeraeten.jpg\" alt=\"Geschichte von Gasmessger\u00e4ten\" class=\"wp-image-1404\" srcset=\"https:\/\/www.compur.com\/wp-content\/uploads\/geschichte-von-gasmessgeraeten.jpg 1200w, https:\/\/www.compur.com\/wp-content\/uploads\/geschichte-von-gasmessgeraeten-768x490.jpg 768w, https:\/\/www.compur.com\/wp-content\/uploads\/geschichte-von-gasmessgeraeten-1024x653.jpg 1024w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption class=\"wp-element-caption\">Orignal : Science Museum London, kopiert aus \u00ab\u00a0Detection of hazardous gases\u00a0\u00bb Cullis and Firth 1981<\/figcaption><\/figure>\n<\/div>\n\n\n<p>Vers le milieu du 18e si\u00e8cle, on a remarqu\u00e9 que des substances dangereuses modifiaient l&rsquo;apparence de la flamme d&rsquo;une bougie. Pour rendre la bougie inoffensive en tant que source d&rsquo;allumage, on a essay\u00e9 de s\u00e9parer la flamme de l&rsquo;atmosph\u00e8re par des colonnes d&rsquo;eau. Mais cette m\u00e9thode \u00e9tait tr\u00e8s compliqu\u00e9e. Finalement, l&rsquo;id\u00e9e de Humphrey Davy de s\u00e9parer la flamme de l&rsquo;atmosph\u00e8re par des filets m\u00e9talliques \u00e0 mailles serr\u00e9es s&rsquo;est impos\u00e9e. En 1816, les premi\u00e8res lampes Davy ont \u00e9t\u00e9 test\u00e9es en Angleterre. Il s&rsquo;agissait de lampes \u00e0 huile dont la flamme br\u00fblait derri\u00e8re un type primitif de pare-flamme.<\/p>\n\n\n\n<p>Pendant plus de 150 ans, la lampe Davy originale, avec quelques am\u00e9liorations au fil du temps, sera le seul moyen de d\u00e9tection des gaz. Il y a eu des tentatives pour faciliter l&rsquo;estimation de la hauteur de la flamme en installant une \u00e9chelle gradu\u00e9e. L&rsquo;installation d&rsquo;un capteur bim\u00e9tallique pourrait d\u00e9j\u00e0 \u00eatre consid\u00e9r\u00e9e comme le pr\u00e9curseur d&rsquo;une mesure de la temp\u00e9rature de la flamme. (Plus il y avait de m\u00e9thane, plus il y avait de combustible disponible, plus la flamme \u00e9tait chaude, plus la d\u00e9viation du bim\u00e9tal \u00e9tait importante).<\/p>\n\n\n\n<p>Certes, on disposait d\u00e9sormais d&rsquo;un outil permettant de produire de la lumi\u00e8re et, avec un peu d&rsquo;exp\u00e9rience, d&rsquo;\u00e9valuer la pr\u00e9sence de gaz dangereux. Mais cette m\u00e9thode n\u00e9cessitait que l&rsquo;air ambiant contienne suffisamment d&rsquo;oxyg\u00e8ne. Malheureusement, ce n&rsquo;est pas du tout s\u00fbr sous terre. Dieu merci, les m\u00e9thodes de d\u00e9tection de gaz se sont depuis lors de plus en plus affin\u00e9es.<\/p>\n\n\n\n<p>Retour \u00e0 l&rsquo;\u00e9poque actuelle, donc.<\/p>\n<\/div><\/div>\n\n<\/div><\/div>\n\n<style>.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id1924_fa5b41-50{margin-top:var(--global-kb-spacing-xxl, 5rem);margin-bottom:var(--global-kb-spacing-xxl, 5rem);}.kb-row-layout-id1924_fa5b41-50 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id1924_fa5b41-50 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id1924_fa5b41-50 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);max-width:var( --global-content-width, 1290px );padding-left:var(--global-content-edge-padding);padding-right:var(--global-content-edge-padding);padding-top:0px;padding-bottom:0px;grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id1924_fa5b41-50{border-top:0px solid var(--global-palette1, #3182CE);border-right:0px solid var(--global-palette1, #3182CE);border-bottom:0px solid var(--global-palette1, #3182CE);border-left:0px solid var(--global-palette1, #3182CE);}.kb-row-layout-id1924_fa5b41-50 > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id1924_fa5b41-50{margin-top:var(--global-kb-spacing-xl, 4rem);margin-bottom:var(--global-kb-spacing-xl, 4rem);}}@media all and (max-width: 1024px){.kb-row-layout-id1924_fa5b41-50 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 1024px){.kb-row-layout-id1924_fa5b41-50{border-top:0px solid var(--global-palette1, #3182CE);border-right:0px solid var(--global-palette1, #3182CE);border-bottom:0px solid var(--global-palette1, #3182CE);border-left:0px solid var(--global-palette1, #3182CE);}}@media all and (max-width: 767px){.kb-row-layout-id1924_fa5b41-50 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id1924_fa5b41-50{border-top:0px solid var(--global-palette1, #3182CE);border-right:0px solid var(--global-palette1, #3182CE);border-bottom:0px solid var(--global-palette1, #3182CE);border-left:0px solid var(--global-palette1, #3182CE);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id1924_fa5b41-50 alignnone wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-1-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top kt-inner-column-height-full kb-theme-content-width\">\n<style>.kadence-column1924_fbbe39-5c > .kt-inside-inner-col,.kadence-column1924_fbbe39-5c > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column1924_fbbe39-5c > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column1924_fbbe39-5c > .kt-inside-inner-col{flex-direction:column;}.kadence-column1924_fbbe39-5c > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column1924_fbbe39-5c > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column1924_fbbe39-5c{position:relative;}@media all and (max-width: 1024px){.kadence-column1924_fbbe39-5c > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column1924_fbbe39-5c > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column1924_fbbe39-5c\"><div class=\"kt-inside-inner-col\">\n<h2 class=\"wp-block-heading has-text-align-left eplus-wrapper\">2. Comment fonctionnent les d\u00e9tecteurs de gaz modernes ?<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">2.1 Mesure des gaz combustibles<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"a5\">2.1.1 Capteurs catalytiques<\/h4>\n\n\n\n<p>Ces capteurs utilisent la propri\u00e9t\u00e9 des mati\u00e8res combustibles \u00e0 d\u00e9gager de l&rsquo;\u00e9nergie lors de leur combustion. C&rsquo;est pourquoi on les appelle aussi capteurs de chaleur. Voici ce qui se passe lors de la combustion du m\u00e9thane, par exemple :<\/p>\n\n\n\n<p>CH<sub>4<\/sub>&nbsp;+ 2 O<sub>2<\/sub>&nbsp;-&gt; CO<sub>2<\/sub>&nbsp;+ 2 H<sub>2<\/sub>O + \u00c9nergie<\/p>\n\n\n\n<p>L&rsquo;\u00e9nergie d\u00e9gag\u00e9e par cette r\u00e9action est d&rsquo;autant plus importante que la quantit\u00e9 de m\u00e9thane dans l&rsquo;air est \u00e9lev\u00e9e. Il ne restait plus qu&rsquo;\u00e0 imaginer un dispositif permettant de d\u00e9terminer avec pr\u00e9cision l&rsquo;\u00e9nergie d\u00e9gag\u00e9e. Pour cela, on utilise deux perles de c\u00e9ramique (\u00e9galement appel\u00e9es pellistors), toutes deux chauff\u00e9es \u00e0 environ 400 \u00b0C par un filament de platine \u00e0 l&rsquo;int\u00e9rieur. L&rsquo;un des filaments est recouvert d&rsquo;un rev\u00eatement catalytique. Le m\u00e9thane est oxyd\u00e9 \u00e0 sa surface, c&rsquo;est-\u00e0-dire que de l&rsquo;\u00e9nergie est lib\u00e9r\u00e9e et que le filament continue \u00e0 se r\u00e9chauffer. Cet \u00e9chauffement augmente la r\u00e9sistance \u00e9lectrique du filament. Le deuxi\u00e8me filament n&rsquo;est pas recouvert d&rsquo;un rev\u00eatement catalytique, aucune oxydation ne se produit sur lui. En comparant avec cet \u00e9l\u00e9ment passif, on compense le signal contre les variations de temp\u00e9rature ext\u00e9rieures, le flux d&rsquo;air, l&rsquo;humidit\u00e9, etc. car ces influences agissent de la m\u00eame mani\u00e8re sur les deux perles de c\u00e9ramique.<\/p>\n\n\n\n<p>Une m\u00e9thode tr\u00e8s pr\u00e9cise pour mesurer les variations de r\u00e9sistance est le pont de Wheatstone.<\/p>\n\n\n<style>.kb-row-layout-id1924_5415a2-55 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id1924_5415a2-55 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id1924_5415a2-55 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);padding-top:0px;padding-bottom:var(--global-kb-spacing-md, 2rem);grid-template-columns:repeat(2, minmax(0, 1fr));}.kb-row-layout-id1924_5415a2-55 > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-id1924_5415a2-55 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 767px){.kb-row-layout-id1924_5415a2-55 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id1924_5415a2-55 alignnone wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-row-layout-equal kt-tab-layout-row kt-mobile-layout-row kt-row-valign-top kt-inner-column-height-full\">\n<style>.kadence-column1924_feed1c-52 > .kt-inside-inner-col,.kadence-column1924_feed1c-52 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column1924_feed1c-52 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column1924_feed1c-52 > .kt-inside-inner-col{flex-direction:column;}.kadence-column1924_feed1c-52 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column1924_feed1c-52 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column1924_feed1c-52{position:relative;}@media all and (max-width: 1024px){.kadence-column1924_feed1c-52 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column1924_feed1c-52 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column1924_feed1c-52\"><div class=\"kt-inside-inner-col\">\n<p>Les deux h\u00e9lices sont connect\u00e9es comme les branches d&rsquo;un pont de Wheatstone. Cette m\u00e9thode permet de mesurer tr\u00e8s pr\u00e9cis\u00e9ment la variation de r\u00e9sistance, et donc indirectement la teneur en combustible de l&rsquo;atmosph\u00e8re. Ce signal peut \u00eatre utilis\u00e9 pour \u00e9valuer si l&rsquo;atmosph\u00e8re est explosive ou non. On ne veut pas conna\u00eetre la concentration r\u00e9elle. On veut seulement savoir s&rsquo;il y a un risque d&rsquo;explosion ou non. C&rsquo;est pourquoi on r\u00e8gle la plage de mesure sur 0 &#8211; 100 % LIE (= limite inf\u00e9rieure d&rsquo;explosivit\u00e9). Malheureusement, la LIE est une grandeur sp\u00e9cifique \u00e0 la substance. Il faut donc savoir \u00e0 quel gaz on a affaire. Ensuite, il faut chercher dans la litt\u00e9rature \u00e0 quelle concentration de ce gaz correspond la LIE.<\/p>\n<\/div><\/div>\n\n\n<style>.kadence-column1924_1bc0a5-c2 > .kt-inside-inner-col,.kadence-column1924_1bc0a5-c2 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column1924_1bc0a5-c2 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column1924_1bc0a5-c2 > .kt-inside-inner-col{flex-direction:column;}.kadence-column1924_1bc0a5-c2 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column1924_1bc0a5-c2 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column1924_1bc0a5-c2{position:relative;}@media all and (max-width: 1024px){.kadence-column1924_1bc0a5-c2 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column1924_1bc0a5-c2 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column1924_1bc0a5-c2\"><div class=\"kt-inside-inner-col\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"362\" height=\"263\" src=\"https:\/\/www.compur.com\/wp-content\/uploads\/wheatstone-schaltung.jpg\" alt=\"Bild Wheatstone Schaltung\" class=\"wp-image-1421\"\/><figcaption class=\"wp-element-caption\">Image circuit Wheatstone<\/figcaption><\/figure>\n<\/div><\/div><\/div>\n\n<\/div><\/div>\n\n\n<p>Les choses se compliquent lorsque des m\u00e9langes de gaz peuvent appara\u00eetre. Comme on ne peut g\u00e9n\u00e9ralement pas pr\u00e9voir la composition proportionnelle, on s&rsquo;aide d&rsquo;un \u00e9talonnage dit de s\u00e9curit\u00e9. Dans ce cas, on ne r\u00e8gle pas du tout son appareil de mesure sur le m\u00e9lange de gaz attendu, mais sur une substance qui est d\u00e9tect\u00e9e avec une sensibilit\u00e9 moindre. Le nonane est souvent utilis\u00e9, car il poss\u00e8de une LIE tr\u00e8s faible. Comme le nonane est un liquide, un \u00e9talonnage au nonane sur le terrain serait toutefois tr\u00e8s compliqu\u00e9. Il est difficile, et donc sujet \u00e0 de grandes erreurs, de produire sur le terrain un m\u00e9lange gazeux pr\u00e9cis \u00e0 partir d&rsquo;un liquide.<\/p>\n\n\n\n<p>C&rsquo;est pourquoi Compur Monitors propose un \u00ab\u00a0double \u00e9talonnage\u00a0\u00bb. L&rsquo;\u00e9talonnage est effectu\u00e9 en laboratoire avec du nonane, puis une deuxi\u00e8me fois avec un gaz de r\u00e9f\u00e9rence, par exemple du butane. Le facteur de r\u00e9f\u00e9rence est inscrit sur le capteur, ce qui permet \u00e0 l&rsquo;utilisateur de calibrer facilement sur le terrain avec un m\u00e9lange air\/butane provenant d&rsquo;une bouteille du commerce. Il applique ensuite le facteur de r\u00e9f\u00e9rence \u00e0 cette bouteille.<\/p>\n\n\n<style>.wp-block-kadence-advancedheading.kt-adv-heading1924_a8e3f9-6d, .wp-block-kadence-advancedheading.kt-adv-heading1924_a8e3f9-6d[data-kb-block=\"kb-adv-heading1924_a8e3f9-6d\"]{margin-bottom:var(--global-kb-spacing-xs, 1rem);font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading1924_a8e3f9-6d mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading1924_a8e3f9-6d[data-kb-block=\"kb-adv-heading1924_a8e3f9-6d\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading1924_a8e3f9-6d img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading1924_a8e3f9-6d[data-kb-block=\"kb-adv-heading1924_a8e3f9-6d\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<p class=\"kt-adv-heading1924_a8e3f9-6d wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading1924_a8e3f9-6d\"><strong>Les capteurs catalytiques pr\u00e9sentent de nombreux avantages :<\/strong><\/p>\n\n\n<style>.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_660036-bf:not(.this-stops-third-party-issues){margin-top:0px;margin-bottom:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_660036-bf ul.kt-svg-icon-list:not(.this-prevents-issues):not(.this-stops-third-party-issues):not(.tijsloc){margin-top:0px;margin-right:0px;margin-bottom:var(--global-kb-spacing-sm, 1.5rem);margin-left:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_660036-bf ul.kt-svg-icon-list{grid-row-gap:12px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_660036-bf .kb-svg-icon-wrap{font-size:24px;color:var(--global-palette1, #3182CE);}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_660036-bf ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap .kt-svg-icon-list-single{margin-right:18px;}.kt-svg-icon-list-items1924_660036-bf ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap, .kt-svg-icon-list-items1924_660036-bf ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap a{font-size:var(--global-kb-font-size-md, 1.25rem);}.kt-svg-icon-list-items1924_660036-bf ul.kt-svg-icon-list .kt-svg-icon-list-level-0 .kt-svg-icon-list-single svg{font-size:20px;}<\/style>\n<div class=\"wp-block-kadence-iconlist kt-svg-icon-list-items kt-svg-icon-list-items1924_660036-bf kt-svg-icon-list-columns-1 alignnone kt-list-icon-aligntop\"><ul class=\"kt-svg-icon-list\"><style>.kt-svg-icon-list-item-1924_f35981-78 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_f35981-78\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-up kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M104 224H24c-13.255 0-24 10.745-24 24v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V248c0-13.255-10.745-24-24-24zM64 472c-13.255 0-24-10.745-24-24s10.745-24 24-24 24 10.745 24 24-10.745 24-24 24zM384 81.452c0 42.416-25.97 66.208-33.277 94.548h101.723c33.397 0 59.397 27.746 59.553 58.098.084 17.938-7.546 37.249-19.439 49.197l-.11.11c9.836 23.337 8.237 56.037-9.308 79.469 8.681 25.895-.069 57.704-16.382 74.757 4.298 17.598 2.244 32.575-6.148 44.632C440.202 511.587 389.616 512 346.839 512l-2.845-.001c-48.287-.017-87.806-17.598-119.56-31.725-15.957-7.099-36.821-15.887-52.651-16.178-6.54-.12-11.783-5.457-11.783-11.998v-213.77c0-3.2 1.282-6.271 3.558-8.521 39.614-39.144 56.648-80.587 89.117-113.111 14.804-14.832 20.188-37.236 25.393-58.902C282.515 39.293 291.817 0 312 0c24 0 72 8 72 81.452z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Ils r\u00e9agissent \u00e0 tout ce qui br\u00fble<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-1924_a362b6-59 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_a362b6-59\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-up kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M104 224H24c-13.255 0-24 10.745-24 24v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V248c0-13.255-10.745-24-24-24zM64 472c-13.255 0-24-10.745-24-24s10.745-24 24-24 24 10.745 24 24-10.745 24-24 24zM384 81.452c0 42.416-25.97 66.208-33.277 94.548h101.723c33.397 0 59.397 27.746 59.553 58.098.084 17.938-7.546 37.249-19.439 49.197l-.11.11c9.836 23.337 8.237 56.037-9.308 79.469 8.681 25.895-.069 57.704-16.382 74.757 4.298 17.598 2.244 32.575-6.148 44.632C440.202 511.587 389.616 512 346.839 512l-2.845-.001c-48.287-.017-87.806-17.598-119.56-31.725-15.957-7.099-36.821-15.887-52.651-16.178-6.54-.12-11.783-5.457-11.783-11.998v-213.77c0-3.2 1.282-6.271 3.558-8.521 39.614-39.144 56.648-80.587 89.117-113.111 14.804-14.832 20.188-37.236 25.393-58.902C282.515 39.293 291.817 0 312 0c24 0 72 8 72 81.452z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Ils sont tr\u00e8s bon march\u00e9<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-1924_4b2acd-3d .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_4b2acd-3d\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-up kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M104 224H24c-13.255 0-24 10.745-24 24v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V248c0-13.255-10.745-24-24-24zM64 472c-13.255 0-24-10.745-24-24s10.745-24 24-24 24 10.745 24 24-10.745 24-24 24zM384 81.452c0 42.416-25.97 66.208-33.277 94.548h101.723c33.397 0 59.397 27.746 59.553 58.098.084 17.938-7.546 37.249-19.439 49.197l-.11.11c9.836 23.337 8.237 56.037-9.308 79.469 8.681 25.895-.069 57.704-16.382 74.757 4.298 17.598 2.244 32.575-6.148 44.632C440.202 511.587 389.616 512 346.839 512l-2.845-.001c-48.287-.017-87.806-17.598-119.56-31.725-15.957-7.099-36.821-15.887-52.651-16.178-6.54-.12-11.783-5.457-11.783-11.998v-213.77c0-3.2 1.282-6.271 3.558-8.521 39.614-39.144 56.648-80.587 89.117-113.111 14.804-14.832 20.188-37.236 25.393-58.902C282.515 39.293 291.817 0 312 0c24 0 72 8 72 81.452z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Ils ont une longue dur\u00e9e de vie<\/span><\/li>\n<\/ul><\/div>\n\n\n<style>.wp-block-kadence-advancedheading.kt-adv-heading1924_ff2004-ab, .wp-block-kadence-advancedheading.kt-adv-heading1924_ff2004-ab[data-kb-block=\"kb-adv-heading1924_ff2004-ab\"]{margin-bottom:var(--global-kb-spacing-xs, 1rem);font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading1924_ff2004-ab mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading1924_ff2004-ab[data-kb-block=\"kb-adv-heading1924_ff2004-ab\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading1924_ff2004-ab img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading1924_ff2004-ab[data-kb-block=\"kb-adv-heading1924_ff2004-ab\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<p class=\"kt-adv-heading1924_ff2004-ab wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading1924_ff2004-ab\"><strong>Bien s\u00fbr, il y a aussi des inconv\u00e9nients :<\/strong><\/p>\n\n\n<style>.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_c96f6f-90:not(.this-stops-third-party-issues){margin-top:0px;margin-bottom:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_c96f6f-90 ul.kt-svg-icon-list:not(.this-prevents-issues):not(.this-stops-third-party-issues):not(.tijsloc){margin-top:0px;margin-right:0px;margin-bottom:var(--global-kb-spacing-sm, 1.5rem);margin-left:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_c96f6f-90 ul.kt-svg-icon-list{grid-row-gap:12px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_c96f6f-90 .kb-svg-icon-wrap{font-size:24px;color:var(--global-palette5, #4A5568);}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_c96f6f-90 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap .kt-svg-icon-list-single{margin-right:18px;}.kt-svg-icon-list-items1924_c96f6f-90 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap, .kt-svg-icon-list-items1924_c96f6f-90 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap a{font-size:var(--global-kb-font-size-md, 1.25rem);}.kt-svg-icon-list-items1924_c96f6f-90 ul.kt-svg-icon-list .kt-svg-icon-list-level-0 .kt-svg-icon-list-single svg{font-size:20px;}<\/style>\n<div class=\"wp-block-kadence-iconlist kt-svg-icon-list-items kt-svg-icon-list-items1924_c96f6f-90 kt-svg-icon-list-columns-1 alignnone kt-list-icon-aligntop\"><ul class=\"kt-svg-icon-list\"><style>.kt-svg-icon-list-item-1924_e1285e-40 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_e1285e-40\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-down kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M0 56v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V56c0-13.255-10.745-24-24-24H24C10.745 32 0 42.745 0 56zm40 200c0-13.255 10.745-24 24-24s24 10.745 24 24-10.745 24-24 24-24-10.745-24-24zm272 256c-20.183 0-29.485-39.293-33.931-57.795-5.206-21.666-10.589-44.07-25.393-58.902-32.469-32.524-49.503-73.967-89.117-113.111a11.98 11.98 0 0 1-3.558-8.521V59.901c0-6.541 5.243-11.878 11.783-11.998 15.831-.29 36.694-9.079 52.651-16.178C256.189 17.598 295.709.017 343.995 0h2.844c42.777 0 93.363.413 113.774 29.737 8.392 12.057 10.446 27.034 6.148 44.632 16.312 17.053 25.063 48.863 16.382 74.757 17.544 23.432 19.143 56.132 9.308 79.469l.11.11c11.893 11.949 19.523 31.259 19.439 49.197-.156 30.352-26.157 58.098-59.553 58.098H350.723C358.03 364.34 384 388.132 384 430.548 384 504 336 512 312 512z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Vous avez besoin d&rsquo;oxyg\u00e8ne<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-1924_d343fc-ff .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_d343fc-ff\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-down kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M0 56v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V56c0-13.255-10.745-24-24-24H24C10.745 32 0 42.745 0 56zm40 200c0-13.255 10.745-24 24-24s24 10.745 24 24-10.745 24-24 24-24-10.745-24-24zm272 256c-20.183 0-29.485-39.293-33.931-57.795-5.206-21.666-10.589-44.07-25.393-58.902-32.469-32.524-49.503-73.967-89.117-113.111a11.98 11.98 0 0 1-3.558-8.521V59.901c0-6.541 5.243-11.878 11.783-11.998 15.831-.29 36.694-9.079 52.651-16.178C256.189 17.598 295.709.017 343.995 0h2.844c42.777 0 93.363.413 113.774 29.737 8.392 12.057 10.446 27.034 6.148 44.632 16.312 17.053 25.063 48.863 16.382 74.757 17.544 23.432 19.143 56.132 9.308 79.469l.11.11c11.893 11.949 19.523 31.259 19.439 49.197-.156 30.352-26.157 58.098-59.553 58.098H350.723C358.03 364.34 384 388.132 384 430.548 384 504 336 512 312 512z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Ils peuvent \u00eatre rendus insensibles par des poisons catalyseurs (silicone, m\u00e9taux lourds, gaz corrosifs).<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-1924_e959af-27 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_e959af-27\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-down kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M0 56v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V56c0-13.255-10.745-24-24-24H24C10.745 32 0 42.745 0 56zm40 200c0-13.255 10.745-24 24-24s24 10.745 24 24-10.745 24-24 24-24-10.745-24-24zm272 256c-20.183 0-29.485-39.293-33.931-57.795-5.206-21.666-10.589-44.07-25.393-58.902-32.469-32.524-49.503-73.967-89.117-113.111a11.98 11.98 0 0 1-3.558-8.521V59.901c0-6.541 5.243-11.878 11.783-11.998 15.831-.29 36.694-9.079 52.651-16.178C256.189 17.598 295.709.017 343.995 0h2.844c42.777 0 93.363.413 113.774 29.737 8.392 12.057 10.446 27.034 6.148 44.632 16.312 17.053 25.063 48.863 16.382 74.757 17.544 23.432 19.143 56.132 9.308 79.469l.11.11c11.893 11.949 19.523 31.259 19.439 49.197-.156 30.352-26.157 58.098-59.553 58.098H350.723C358.03 364.34 384 388.132 384 430.548 384 504 336 512 312 512z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Une intoxication passe inaper\u00e7ue<\/span><\/li>\n<\/ul><\/div>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"a6\">2.1.2 Capteurs infrarouges<\/h4>\n\n\n\n<p>De nombreux gaz absorbent la lumi\u00e8re \u00e0 une longueur d&rsquo;onde bien pr\u00e9cise. Chaque mol\u00e9cule pr\u00e9l\u00e8ve un certain nombre de quanta de lumi\u00e8re dans un rayon lumineux. Cette \u00e9nergie est utilis\u00e9e pour faire vibrer certains \u00e9lectrons de la mol\u00e9cule. Heureusement, cet effet ne se produit qu&rsquo;\u00e0 des longueurs d&rsquo;onde bien pr\u00e9cises. En choisissant correctement la longueur d&rsquo;onde, on peut donc d\u00e9terminer quel gaz l&rsquo;appareil doit mesurer. Pour mesurer les hydrocarbures, on choisit 3,4 \u03bc. \u00c0 cette longueur d&rsquo;onde, la liaison C &#8211; H des hydrocarbures absorbe. Si l&rsquo;on peut donc mesurer la quantit\u00e9 d&rsquo;\u00e9nergie absorb\u00e9e, on peut en d\u00e9duire la quantit\u00e9 de mol\u00e9cules de gaz sur le trajet de la lumi\u00e8re.<\/p>\n\n\n\n<p>Un d\u00e9tecteur de gaz \u00e0 infrarouge est donc con\u00e7u de la mani\u00e8re suivante : On envoie un faisceau lumineux \u00e0 travers une cuvette \u00e0 l&rsquo;extr\u00e9mit\u00e9 de laquelle se trouve un d\u00e9tecteur de lumi\u00e8re.<\/p>\n\n\n<style>.kb-row-layout-id1924_e9fae3-62 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id1924_e9fae3-62 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id1924_e9fae3-62 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);padding-top:0px;padding-bottom:var(--global-kb-spacing-md, 2rem);grid-template-columns:repeat(2, minmax(0, 1fr));}.kb-row-layout-id1924_e9fae3-62 > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-id1924_e9fae3-62 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 767px){.kb-row-layout-id1924_e9fae3-62 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id1924_e9fae3-62 alignnone wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-row-layout-equal kt-tab-layout-row kt-mobile-layout-row kt-row-valign-top kt-inner-column-height-full\">\n<style>.kadence-column1924_59423e-3e > .kt-inside-inner-col,.kadence-column1924_59423e-3e > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column1924_59423e-3e > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column1924_59423e-3e > .kt-inside-inner-col{flex-direction:column;}.kadence-column1924_59423e-3e > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column1924_59423e-3e > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column1924_59423e-3e{position:relative;}@media all and (max-width: 1024px){.kadence-column1924_59423e-3e > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column1924_59423e-3e > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column1924_59423e-3e\"><div class=\"kt-inside-inner-col\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"559\" src=\"https:\/\/www.compur.com\/wp-content\/uploads\/infrarotsensor-compur-fuer-gasmessgeraete.jpg\" alt=\"Infrarotsensor Compur f\u00fcr Gasmessger\u00e4te\" class=\"wp-image-1422\" srcset=\"https:\/\/www.compur.com\/wp-content\/uploads\/infrarotsensor-compur-fuer-gasmessgeraete.jpg 1200w, https:\/\/www.compur.com\/wp-content\/uploads\/infrarotsensor-compur-fuer-gasmessgeraete-768x358.jpg 768w, https:\/\/www.compur.com\/wp-content\/uploads\/infrarotsensor-compur-fuer-gasmessgeraete-1024x477.jpg 1024w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption class=\"wp-element-caption\">Image capteur infrarouge (source : Compur Monitors)<\/figcaption><\/figure>\n<\/div><\/div><\/div>\n\n\n<style>.kadence-column1924_0ae5e5-13 > .kt-inside-inner-col,.kadence-column1924_0ae5e5-13 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column1924_0ae5e5-13 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column1924_0ae5e5-13 > .kt-inside-inner-col{flex-direction:column;}.kadence-column1924_0ae5e5-13 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column1924_0ae5e5-13 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column1924_0ae5e5-13{position:relative;}@media all and (max-width: 1024px){.kadence-column1924_0ae5e5-13 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column1924_0ae5e5-13 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column1924_0ae5e5-13\"><div class=\"kt-inside-inner-col\">\n<p>Moins le d\u00e9tecteur re\u00e7oit de lumi\u00e8re, plus il y a de gaz dans la cuvette. Pour compenser d&rsquo;autres influences environnementales comme l&rsquo;humidit\u00e9, la pression ou la temp\u00e9rature, on utilise un deuxi\u00e8me faisceau avec une autre longueur d&rsquo;onde. Pour produire une lumi\u00e8re d&rsquo;une longueur d&rsquo;onde bien pr\u00e9cise, on utilise des filtres, des r\u00e9seaux optiques, des prismes ou m\u00eame des sources lumineuses LED d&rsquo;une certaine couleur.<\/p>\n\n\n\n<p>On peut tout aussi bien diviser un seul faisceau lumineux derri\u00e8re la cuvette en deux faisceaux de longueurs d&rsquo;onde diff\u00e9rentes.<\/p>\n<\/div><\/div>\n\n<\/div><\/div>\n\n<style>.wp-block-kadence-advancedheading.kt-adv-heading1924_8990e2-2e, .wp-block-kadence-advancedheading.kt-adv-heading1924_8990e2-2e[data-kb-block=\"kb-adv-heading1924_8990e2-2e\"]{margin-bottom:var(--global-kb-spacing-xs, 1rem);font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading1924_8990e2-2e mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading1924_8990e2-2e[data-kb-block=\"kb-adv-heading1924_8990e2-2e\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading1924_8990e2-2e img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading1924_8990e2-2e[data-kb-block=\"kb-adv-heading1924_8990e2-2e\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<p class=\"kt-adv-heading1924_8990e2-2e wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading1924_8990e2-2e\"><strong>Les capteurs infrarouges pr\u00e9sentent plusieurs avantages :<\/strong><\/p>\n\n\n<style>.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_54354a-b5:not(.this-stops-third-party-issues){margin-top:0px;margin-bottom:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_54354a-b5 ul.kt-svg-icon-list:not(.this-prevents-issues):not(.this-stops-third-party-issues):not(.tijsloc){margin-top:0px;margin-right:0px;margin-bottom:var(--global-kb-spacing-sm, 1.5rem);margin-left:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_54354a-b5 ul.kt-svg-icon-list{grid-row-gap:12px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_54354a-b5 .kb-svg-icon-wrap{font-size:24px;color:var(--global-palette1, #3182CE);}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_54354a-b5 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap .kt-svg-icon-list-single{margin-right:18px;}.kt-svg-icon-list-items1924_54354a-b5 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap, .kt-svg-icon-list-items1924_54354a-b5 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap a{font-size:var(--global-kb-font-size-md, 1.25rem);}.kt-svg-icon-list-items1924_54354a-b5 ul.kt-svg-icon-list .kt-svg-icon-list-level-0 .kt-svg-icon-list-single svg{font-size:20px;}<\/style>\n<div class=\"wp-block-kadence-iconlist kt-svg-icon-list-items kt-svg-icon-list-items1924_54354a-b5 kt-svg-icon-list-columns-1 alignnone kt-list-icon-aligntop\"><ul class=\"kt-svg-icon-list\"><style>.kt-svg-icon-list-item-1924_3502d2-72 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_3502d2-72\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-up kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M104 224H24c-13.255 0-24 10.745-24 24v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V248c0-13.255-10.745-24-24-24zM64 472c-13.255 0-24-10.745-24-24s10.745-24 24-24 24 10.745 24 24-10.745 24-24 24zM384 81.452c0 42.416-25.97 66.208-33.277 94.548h101.723c33.397 0 59.397 27.746 59.553 58.098.084 17.938-7.546 37.249-19.439 49.197l-.11.11c9.836 23.337 8.237 56.037-9.308 79.469 8.681 25.895-.069 57.704-16.382 74.757 4.298 17.598 2.244 32.575-6.148 44.632C440.202 511.587 389.616 512 346.839 512l-2.845-.001c-48.287-.017-87.806-17.598-119.56-31.725-15.957-7.099-36.821-15.887-52.651-16.178-6.54-.12-11.783-5.457-11.783-11.998v-213.77c0-3.2 1.282-6.271 3.558-8.521 39.614-39.144 56.648-80.587 89.117-113.111 14.804-14.832 20.188-37.236 25.393-58.902C282.515 39.293 291.817 0 312 0c24 0 72 8 72 81.452z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Ils n&rsquo;ont pas besoin d&rsquo;oxyg\u00e8ne<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-1924_f2834a-5f .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_f2834a-5f\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-up kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M104 224H24c-13.255 0-24 10.745-24 24v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V248c0-13.255-10.745-24-24-24zM64 472c-13.255 0-24-10.745-24-24s10.745-24 24-24 24 10.745 24 24-10.745 24-24 24zM384 81.452c0 42.416-25.97 66.208-33.277 94.548h101.723c33.397 0 59.397 27.746 59.553 58.098.084 17.938-7.546 37.249-19.439 49.197l-.11.11c9.836 23.337 8.237 56.037-9.308 79.469 8.681 25.895-.069 57.704-16.382 74.757 4.298 17.598 2.244 32.575-6.148 44.632C440.202 511.587 389.616 512 346.839 512l-2.845-.001c-48.287-.017-87.806-17.598-119.56-31.725-15.957-7.099-36.821-15.887-52.651-16.178-6.54-.12-11.783-5.457-11.783-11.998v-213.77c0-3.2 1.282-6.271 3.558-8.521 39.614-39.144 56.648-80.587 89.117-113.111 14.804-14.832 20.188-37.236 25.393-58.902C282.515 39.293 291.817 0 312 0c24 0 72 8 72 81.452z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Ils ne peuvent pas \u00eatre empoisonn\u00e9s<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-1924_328765-42 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_328765-42\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-up kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M104 224H24c-13.255 0-24 10.745-24 24v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V248c0-13.255-10.745-24-24-24zM64 472c-13.255 0-24-10.745-24-24s10.745-24 24-24 24 10.745 24 24-10.745 24-24 24zM384 81.452c0 42.416-25.97 66.208-33.277 94.548h101.723c33.397 0 59.397 27.746 59.553 58.098.084 17.938-7.546 37.249-19.439 49.197l-.11.11c9.836 23.337 8.237 56.037-9.308 79.469 8.681 25.895-.069 57.704-16.382 74.757 4.298 17.598 2.244 32.575-6.148 44.632C440.202 511.587 389.616 512 346.839 512l-2.845-.001c-48.287-.017-87.806-17.598-119.56-31.725-15.957-7.099-36.821-15.887-52.651-16.178-6.54-.12-11.783-5.457-11.783-11.998v-213.77c0-3.2 1.282-6.271 3.558-8.521 39.614-39.144 56.648-80.587 89.117-113.111 14.804-14.832 20.188-37.236 25.393-58.902C282.515 39.293 291.817 0 312 0c24 0 72 8 72 81.452z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">L&rsquo;utilisation d&rsquo;une cuvette tr\u00e8s longue permet d&rsquo;obtenir des sensibilit\u00e9s tr\u00e8s \u00e9lev\u00e9es.<\/span><\/li>\n<\/ul><\/div>\n\n\n<style>.wp-block-kadence-advancedheading.kt-adv-heading1924_19ada0-24, .wp-block-kadence-advancedheading.kt-adv-heading1924_19ada0-24[data-kb-block=\"kb-adv-heading1924_19ada0-24\"]{margin-bottom:var(--global-kb-spacing-xs, 1rem);font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading1924_19ada0-24 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading1924_19ada0-24[data-kb-block=\"kb-adv-heading1924_19ada0-24\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading1924_19ada0-24 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading1924_19ada0-24[data-kb-block=\"kb-adv-heading1924_19ada0-24\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<p class=\"kt-adv-heading1924_19ada0-24 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading1924_19ada0-24\"><strong>Bien s\u00fbr, il y a aussi des inconv\u00e9nients :<\/strong><\/p>\n\n\n<style>.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_8e8ebb-aa:not(.this-stops-third-party-issues){margin-top:0px;margin-bottom:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_8e8ebb-aa ul.kt-svg-icon-list:not(.this-prevents-issues):not(.this-stops-third-party-issues):not(.tijsloc){margin-top:0px;margin-right:0px;margin-bottom:var(--global-kb-spacing-sm, 1.5rem);margin-left:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_8e8ebb-aa ul.kt-svg-icon-list{grid-row-gap:12px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_8e8ebb-aa .kb-svg-icon-wrap{font-size:24px;color:var(--global-palette5, #4A5568);}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_8e8ebb-aa ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap .kt-svg-icon-list-single{margin-right:18px;}.kt-svg-icon-list-items1924_8e8ebb-aa ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap, .kt-svg-icon-list-items1924_8e8ebb-aa ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap a{font-size:var(--global-kb-font-size-md, 1.25rem);}.kt-svg-icon-list-items1924_8e8ebb-aa ul.kt-svg-icon-list .kt-svg-icon-list-level-0 .kt-svg-icon-list-single svg{font-size:20px;}<\/style>\n<div class=\"wp-block-kadence-iconlist kt-svg-icon-list-items kt-svg-icon-list-items1924_8e8ebb-aa kt-svg-icon-list-columns-1 alignnone kt-list-icon-aligntop\"><ul class=\"kt-svg-icon-list\"><style>.kt-svg-icon-list-item-1924_9b2e87-d1 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_9b2e87-d1\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-down kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M0 56v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V56c0-13.255-10.745-24-24-24H24C10.745 32 0 42.745 0 56zm40 200c0-13.255 10.745-24 24-24s24 10.745 24 24-10.745 24-24 24-24-10.745-24-24zm272 256c-20.183 0-29.485-39.293-33.931-57.795-5.206-21.666-10.589-44.07-25.393-58.902-32.469-32.524-49.503-73.967-89.117-113.111a11.98 11.98 0 0 1-3.558-8.521V59.901c0-6.541 5.243-11.878 11.783-11.998 15.831-.29 36.694-9.079 52.651-16.178C256.189 17.598 295.709.017 343.995 0h2.844c42.777 0 93.363.413 113.774 29.737 8.392 12.057 10.446 27.034 6.148 44.632 16.312 17.053 25.063 48.863 16.382 74.757 17.544 23.432 19.143 56.132 9.308 79.469l.11.11c11.893 11.949 19.523 31.259 19.439 49.197-.156 30.352-26.157 58.098-59.553 58.098H350.723C358.03 364.34 384 388.132 384 430.548 384 504 336 512 312 512z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Ils ne mesurent que certains groupes de substances, en g\u00e9n\u00e9ral les hydrocarbures. Ils ne d\u00e9tectent d&rsquo;autres gaz inflammables, comme l&rsquo;ammoniac ou le monoxyde de carbone, qu&rsquo;\u00e0 des longueurs d&rsquo;onde diff\u00e9rentes.<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-1924_7f9108-0d .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_7f9108-0d\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-down kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M0 56v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V56c0-13.255-10.745-24-24-24H24C10.745 32 0 42.745 0 56zm40 200c0-13.255 10.745-24 24-24s24 10.745 24 24-10.745 24-24 24-24-10.745-24-24zm272 256c-20.183 0-29.485-39.293-33.931-57.795-5.206-21.666-10.589-44.07-25.393-58.902-32.469-32.524-49.503-73.967-89.117-113.111a11.98 11.98 0 0 1-3.558-8.521V59.901c0-6.541 5.243-11.878 11.783-11.998 15.831-.29 36.694-9.079 52.651-16.178C256.189 17.598 295.709.017 343.995 0h2.844c42.777 0 93.363.413 113.774 29.737 8.392 12.057 10.446 27.034 6.148 44.632 16.312 17.053 25.063 48.863 16.382 74.757 17.544 23.432 19.143 56.132 9.308 79.469l.11.11c11.893 11.949 19.523 31.259 19.439 49.197-.156 30.352-26.157 58.098-59.553 58.098H350.723C358.03 364.34 384 388.132 384 430.548 384 504 336 512 312 512z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">En r\u00e8gle g\u00e9n\u00e9rale, ils sont un peu plus chers que les haut-parleurs thermiques.<\/span><\/li>\n<\/ul><\/div>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"a7\">2.1.3 Capteurs de temp\u00e9rature de flamme<\/h4>\n\n\n\n<p>Comme d\u00e9crit pr\u00e9c\u00e9demment pour la lampe de Davy, la pr\u00e9sence d&rsquo;un gaz combustible augmente la temp\u00e9rature d&rsquo;une flamme. On utilise g\u00e9n\u00e9ralement une flamme d&rsquo;hydrog\u00e8ne. Un capteur de temp\u00e9rature pr\u00e9cis plac\u00e9 dans la flamme permet de d\u00e9tecter facilement l&rsquo;augmentation de la temp\u00e9rature g\u00e9n\u00e9r\u00e9e par le gaz.<\/p>\n\n\n<style>.wp-block-kadence-advancedheading.kt-adv-heading1924_78d2d0-72, .wp-block-kadence-advancedheading.kt-adv-heading1924_78d2d0-72[data-kb-block=\"kb-adv-heading1924_78d2d0-72\"]{margin-bottom:var(--global-kb-spacing-xs, 1rem);font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading1924_78d2d0-72 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading1924_78d2d0-72[data-kb-block=\"kb-adv-heading1924_78d2d0-72\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading1924_78d2d0-72 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading1924_78d2d0-72[data-kb-block=\"kb-adv-heading1924_78d2d0-72\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<p class=\"kt-adv-heading1924_78d2d0-72 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading1924_78d2d0-72\"><strong>Les capteurs de temp\u00e9rature de flamme pr\u00e9sentent plusieurs avantages :<\/strong><\/p>\n\n\n<style>.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_12d5bb-c9:not(.this-stops-third-party-issues){margin-top:0px;margin-bottom:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_12d5bb-c9 ul.kt-svg-icon-list:not(.this-prevents-issues):not(.this-stops-third-party-issues):not(.tijsloc){margin-top:0px;margin-right:0px;margin-bottom:var(--global-kb-spacing-sm, 1.5rem);margin-left:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_12d5bb-c9 ul.kt-svg-icon-list{grid-row-gap:12px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_12d5bb-c9 .kb-svg-icon-wrap{font-size:24px;color:var(--global-palette1, #3182CE);}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_12d5bb-c9 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap .kt-svg-icon-list-single{margin-right:18px;}.kt-svg-icon-list-items1924_12d5bb-c9 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap, .kt-svg-icon-list-items1924_12d5bb-c9 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap a{font-size:var(--global-kb-font-size-md, 1.25rem);}.kt-svg-icon-list-items1924_12d5bb-c9 ul.kt-svg-icon-list .kt-svg-icon-list-level-0 .kt-svg-icon-list-single svg{font-size:20px;}<\/style>\n<div class=\"wp-block-kadence-iconlist kt-svg-icon-list-items kt-svg-icon-list-items1924_12d5bb-c9 kt-svg-icon-list-columns-1 alignnone kt-list-icon-aligntop\"><ul class=\"kt-svg-icon-list\"><style>.kt-svg-icon-list-item-1924_308d0b-a0 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_308d0b-a0\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-up kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M104 224H24c-13.255 0-24 10.745-24 24v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V248c0-13.255-10.745-24-24-24zM64 472c-13.255 0-24-10.745-24-24s10.745-24 24-24 24 10.745 24 24-10.745 24-24 24zM384 81.452c0 42.416-25.97 66.208-33.277 94.548h101.723c33.397 0 59.397 27.746 59.553 58.098.084 17.938-7.546 37.249-19.439 49.197l-.11.11c9.836 23.337 8.237 56.037-9.308 79.469 8.681 25.895-.069 57.704-16.382 74.757 4.298 17.598 2.244 32.575-6.148 44.632C440.202 511.587 389.616 512 346.839 512l-2.845-.001c-48.287-.017-87.806-17.598-119.56-31.725-15.957-7.099-36.821-15.887-52.651-16.178-6.54-.12-11.783-5.457-11.783-11.998v-213.77c0-3.2 1.282-6.271 3.558-8.521 39.614-39.144 56.648-80.587 89.117-113.111 14.804-14.832 20.188-37.236 25.393-58.902C282.515 39.293 291.817 0 312 0c24 0 72 8 72 81.452z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Ils sont absolument sans danger d&#8217;empoisonnement<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-1924_bfee1f-0e .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_bfee1f-0e\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-up kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M104 224H24c-13.255 0-24 10.745-24 24v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V248c0-13.255-10.745-24-24-24zM64 472c-13.255 0-24-10.745-24-24s10.745-24 24-24 24 10.745 24 24-10.745 24-24 24zM384 81.452c0 42.416-25.97 66.208-33.277 94.548h101.723c33.397 0 59.397 27.746 59.553 58.098.084 17.938-7.546 37.249-19.439 49.197l-.11.11c9.836 23.337 8.237 56.037-9.308 79.469 8.681 25.895-.069 57.704-16.382 74.757 4.298 17.598 2.244 32.575-6.148 44.632C440.202 511.587 389.616 512 346.839 512l-2.845-.001c-48.287-.017-87.806-17.598-119.56-31.725-15.957-7.099-36.821-15.887-52.651-16.178-6.54-.12-11.783-5.457-11.783-11.998v-213.77c0-3.2 1.282-6.271 3.558-8.521 39.614-39.144 56.648-80.587 89.117-113.111 14.804-14.832 20.188-37.236 25.393-58.902C282.515 39.293 291.817 0 312 0c24 0 72 8 72 81.452z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Ils d\u00e9tectent tout gaz inflammable<\/span><\/li>\n<\/ul><\/div>\n\n\n<style>.wp-block-kadence-advancedheading.kt-adv-heading1924_09488e-ca, .wp-block-kadence-advancedheading.kt-adv-heading1924_09488e-ca[data-kb-block=\"kb-adv-heading1924_09488e-ca\"]{margin-bottom:var(--global-kb-spacing-xs, 1rem);font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading1924_09488e-ca mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading1924_09488e-ca[data-kb-block=\"kb-adv-heading1924_09488e-ca\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading1924_09488e-ca img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading1924_09488e-ca[data-kb-block=\"kb-adv-heading1924_09488e-ca\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<p class=\"kt-adv-heading1924_09488e-ca wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading1924_09488e-ca\"><strong>Bien s\u00fbr, il y a aussi des inconv\u00e9nients :<\/strong><\/p>\n\n\n<style>.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_13c539-ae:not(.this-stops-third-party-issues){margin-top:0px;margin-bottom:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_13c539-ae ul.kt-svg-icon-list:not(.this-prevents-issues):not(.this-stops-third-party-issues):not(.tijsloc){margin-top:0px;margin-right:0px;margin-bottom:var(--global-kb-spacing-sm, 1.5rem);margin-left:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_13c539-ae ul.kt-svg-icon-list{grid-row-gap:12px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_13c539-ae .kb-svg-icon-wrap{font-size:24px;color:var(--global-palette5, #4A5568);}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_13c539-ae ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap .kt-svg-icon-list-single{margin-right:18px;}.kt-svg-icon-list-items1924_13c539-ae ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap, .kt-svg-icon-list-items1924_13c539-ae ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap a{font-size:var(--global-kb-font-size-md, 1.25rem);}.kt-svg-icon-list-items1924_13c539-ae ul.kt-svg-icon-list .kt-svg-icon-list-level-0 .kt-svg-icon-list-single svg{font-size:20px;}<\/style>\n<div class=\"wp-block-kadence-iconlist kt-svg-icon-list-items kt-svg-icon-list-items1924_13c539-ae kt-svg-icon-list-columns-1 alignnone kt-list-icon-aligntop\"><ul class=\"kt-svg-icon-list\"><style>.kt-svg-icon-list-item-1924_022f82-11 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_022f82-11\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-down kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M0 56v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V56c0-13.255-10.745-24-24-24H24C10.745 32 0 42.745 0 56zm40 200c0-13.255 10.745-24 24-24s24 10.745 24 24-10.745 24-24 24-24-10.745-24-24zm272 256c-20.183 0-29.485-39.293-33.931-57.795-5.206-21.666-10.589-44.07-25.393-58.902-32.469-32.524-49.503-73.967-89.117-113.111a11.98 11.98 0 0 1-3.558-8.521V59.901c0-6.541 5.243-11.878 11.783-11.998 15.831-.29 36.694-9.079 52.651-16.178C256.189 17.598 295.709.017 343.995 0h2.844c42.777 0 93.363.413 113.774 29.737 8.392 12.057 10.446 27.034 6.148 44.632 16.312 17.053 25.063 48.863 16.382 74.757 17.544 23.432 19.143 56.132 9.308 79.469l.11.11c11.893 11.949 19.523 31.259 19.439 49.197-.156 30.352-26.157 58.098-59.553 58.098H350.723C358.03 364.34 384 388.132 384 430.548 384 504 336 512 312 512z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Ils ont besoin d&rsquo;un combustible. Cela rend la mesure co\u00fbteuse. L&rsquo;approvisionnement en combustible n\u00e9cessite un entretien permanent<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-1924_0c55bc-c1 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_0c55bc-c1\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-down kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M0 56v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V56c0-13.255-10.745-24-24-24H24C10.745 32 0 42.745 0 56zm40 200c0-13.255 10.745-24 24-24s24 10.745 24 24-10.745 24-24 24-24-10.745-24-24zm272 256c-20.183 0-29.485-39.293-33.931-57.795-5.206-21.666-10.589-44.07-25.393-58.902-32.469-32.524-49.503-73.967-89.117-113.111a11.98 11.98 0 0 1-3.558-8.521V59.901c0-6.541 5.243-11.878 11.783-11.998 15.831-.29 36.694-9.079 52.651-16.178C256.189 17.598 295.709.017 343.995 0h2.844c42.777 0 93.363.413 113.774 29.737 8.392 12.057 10.446 27.034 6.148 44.632 16.312 17.053 25.063 48.863 16.382 74.757 17.544 23.432 19.143 56.132 9.308 79.469l.11.11c11.893 11.949 19.523 31.259 19.439 49.197-.156 30.352-26.157 58.098-59.553 58.098H350.723C358.03 364.34 384 388.132 384 430.548 384 504 336 512 312 512z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Ils ont besoin d&rsquo;oxyg\u00e8ne<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-1924_d3db11-01 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_d3db11-01\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-down kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M0 56v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V56c0-13.255-10.745-24-24-24H24C10.745 32 0 42.745 0 56zm40 200c0-13.255 10.745-24 24-24s24 10.745 24 24-10.745 24-24 24-24-10.745-24-24zm272 256c-20.183 0-29.485-39.293-33.931-57.795-5.206-21.666-10.589-44.07-25.393-58.902-32.469-32.524-49.503-73.967-89.117-113.111a11.98 11.98 0 0 1-3.558-8.521V59.901c0-6.541 5.243-11.878 11.783-11.998 15.831-.29 36.694-9.079 52.651-16.178C256.189 17.598 295.709.017 343.995 0h2.844c42.777 0 93.363.413 113.774 29.737 8.392 12.057 10.446 27.034 6.148 44.632 16.312 17.053 25.063 48.863 16.382 74.757 17.544 23.432 19.143 56.132 9.308 79.469l.11.11c11.893 11.949 19.523 31.259 19.439 49.197-.156 30.352-26.157 58.098-59.553 58.098H350.723C358.03 364.34 384 388.132 384 430.548 384 504 336 512 312 512z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Ils sont comparativement chers<\/span><\/li>\n<\/ul><\/div>\n\n\n<style>.wp-block-kadence-advancedbtn.kb-btns1924_7012ea-09{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:flex-start;align-items:center;}.kt-btns1924_7012ea-09 .kt-button{font-weight:normal;font-style:normal;}.kt-btns1924_7012ea-09 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns1924_7012ea-09 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns1924_7012ea-09 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns1924_7012ea-09 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns1924_7012ea-09 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns1924_7012ea-09 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns1924_7012ea-09 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns1924_7012ea-09\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn1924_692e8c-96.kb-button{width:initial;}.wp-block-kadence-advancedbtn .kb-btn1924_692e8c-96.kb-button{color:var(--global-palette9, #ffffff);background:var(--global-palette1, #3182CE);font-size:var(--global-kb-font-size-md, 1.25rem);font-family:var( --global-body-font-family, inherit );font-weight:700;border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;margin-top:var(--global-kb-spacing-sm, 1.5rem);}.wp-block-kadence-advancedbtn .kb-btn1924_692e8c-96.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn1924_692e8c-96.kb-button:focus{color:var(--global-palette3, #1A202C);background:var(--global-palette2, #2B6CB0);}<\/style><a class=\"kb-button kt-button button kb-btn1924_692e8c-96 kt-btn-size-standard kt-btn-width-type-auto kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"#kontakt\"><span class=\"kt-btn-inner-text\">Contactez-nous maintenant<\/span><\/a><\/div>\n<\/div><\/div>\n\n<\/div><\/div>\n\n<style>.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id1924_b9f421-80{margin-top:var(--global-kb-spacing-xxl, 5rem);margin-bottom:var(--global-kb-spacing-xxl, 5rem);}.kb-row-layout-id1924_b9f421-80 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id1924_b9f421-80 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id1924_b9f421-80 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);max-width:var( --global-content-width, 1290px );padding-left:var(--global-content-edge-padding);padding-right:var(--global-content-edge-padding);padding-top:var(--global-kb-spacing-xxl, 5rem);padding-bottom:var(--global-kb-spacing-xxl, 5rem);grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id1924_b9f421-80{border-top:0px solid var(--global-palette1, #3182CE);border-right:0px solid var(--global-palette1, #3182CE);border-bottom:0px solid var(--global-palette1, #3182CE);border-left:0px solid var(--global-palette1, #3182CE);}.kb-row-layout-id1924_b9f421-80 > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id1924_b9f421-80{margin-top:var(--global-kb-spacing-xl, 4rem);margin-bottom:var(--global-kb-spacing-xl, 4rem);}}@media all and (max-width: 1024px){.kb-row-layout-id1924_b9f421-80 > .kt-row-column-wrap{padding-top:var(--global-kb-spacing-xl, 4rem);padding-bottom:var(--global-kb-spacing-xl, 4rem);grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 1024px){.kb-row-layout-id1924_b9f421-80{border-top:0px solid var(--global-palette1, #3182CE);border-right:0px solid var(--global-palette1, #3182CE);border-bottom:0px solid var(--global-palette1, #3182CE);border-left:0px solid var(--global-palette1, #3182CE);}}@media all and (max-width: 767px){.kb-row-layout-id1924_b9f421-80 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id1924_b9f421-80{border-top:0px solid var(--global-palette1, #3182CE);border-right:0px solid var(--global-palette1, #3182CE);border-bottom:0px solid var(--global-palette1, #3182CE);border-left:0px solid var(--global-palette1, #3182CE);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id1924_b9f421-80 alignnone has-theme-palette8-background-color kt-row-has-bg techn-daten wp-block-kadence-rowlayout\" id=\"technische-daten\"><div class=\"kt-row-column-wrap kt-has-1-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top kt-inner-column-height-full kb-theme-content-width\">\n<style>.kadence-column1924_ad5cd9-09 > .kt-inside-inner-col,.kadence-column1924_ad5cd9-09 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column1924_ad5cd9-09 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column1924_ad5cd9-09 > .kt-inside-inner-col{flex-direction:column;}.kadence-column1924_ad5cd9-09 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column1924_ad5cd9-09 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column1924_ad5cd9-09{position:relative;}@media all and (max-width: 1024px){.kadence-column1924_ad5cd9-09 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column1924_ad5cd9-09 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column1924_ad5cd9-09\"><div class=\"kt-inside-inner-col\">\n<h2 class=\"wp-block-heading eplus-wrapper\">3. Mesure des gaz toxiques<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">3.1 Capteurs \u00e9lectrochimiques<\/h3>\n\n\n\n<p>On peut imaginer les capteurs \u00e9lectrochimiques comme une batterie aliment\u00e9e par du gaz. Tant qu&rsquo;il n&rsquo;y a pas de gaz, il ne se passe rien. D\u00e8s qu&rsquo;un gaz donn\u00e9 entre en contact avec l&rsquo;\u00e9lectrode de travail, une r\u00e9action se produit, au cours de laquelle des \u00e9lectrons sont produits ou consomm\u00e9s. Ceux-ci circulent vers la contre-\u00e9lectrode via un appareil de mesure tr\u00e8s sensible.<\/p>\n\n\n<style>.kb-row-layout-id1924_95b4e0-7a > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id1924_95b4e0-7a > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id1924_95b4e0-7a > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);padding-top:0px;padding-bottom:var(--global-kb-spacing-md, 2rem);grid-template-columns:repeat(2, minmax(0, 1fr));}.kb-row-layout-id1924_95b4e0-7a > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-id1924_95b4e0-7a > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 767px){.kb-row-layout-id1924_95b4e0-7a > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id1924_95b4e0-7a alignnone wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-row-layout-equal kt-tab-layout-row kt-mobile-layout-row kt-row-valign-top kt-inner-column-height-full\">\n<style>.kadence-column1924_0f268f-e6 > .kt-inside-inner-col,.kadence-column1924_0f268f-e6 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column1924_0f268f-e6 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column1924_0f268f-e6 > .kt-inside-inner-col{flex-direction:column;}.kadence-column1924_0f268f-e6 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column1924_0f268f-e6 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column1924_0f268f-e6{position:relative;}@media all and (max-width: 1024px){.kadence-column1924_0f268f-e6 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column1924_0f268f-e6 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column1924_0f268f-e6\"><div class=\"kt-inside-inner-col\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"745\" height=\"562\" src=\"https:\/\/www.compur.com\/wp-content\/uploads\/draht-der-arbeitselektrode-eines-schwefelwasserstoffsensors.jpg\" alt=\"In dieser Detailskizze sind die Vorg\u00e4nge an der Arbeitselektrode im Detail dargestellt. Sie zeigt den Draht der Arbeitselektrode eines Schwefelwasserstoffsensors.\" class=\"wp-image-1429\"\/><figcaption class=\"wp-element-caption\">Ce sch\u00e9ma d\u00e9taill\u00e9 pr\u00e9sente en d\u00e9tail les op\u00e9rations effectu\u00e9es sur l&rsquo;\u00e9lectrode de travail. Il montre le fil de l&rsquo;\u00e9lectrode de travail d&rsquo;un capteur de sulfure d&rsquo;hydrog\u00e8ne.<\/figcaption><\/figure>\n<\/div><\/div><\/div>\n\n\n<style>.kadence-column1924_e4a516-21 > .kt-inside-inner-col,.kadence-column1924_e4a516-21 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column1924_e4a516-21 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column1924_e4a516-21 > .kt-inside-inner-col{flex-direction:column;}.kadence-column1924_e4a516-21 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column1924_e4a516-21 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column1924_e4a516-21{position:relative;}@media all and (max-width: 1024px){.kadence-column1924_e4a516-21 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column1924_e4a516-21 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column1924_e4a516-21\"><div class=\"kt-inside-inner-col\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"745\" height=\"562\" src=\"https:\/\/www.compur.com\/wp-content\/uploads\/elektrode-gel-elektrode.jpg\" alt=\"Quelle: Compur Monitors\" class=\"wp-image-1428\"\/><figcaption class=\"wp-element-caption\">Source : Compur Monitors<\/figcaption><\/figure>\n<\/div><\/div><\/div>\n\n<\/div><\/div>\n\n\n<p><strong>Que se passe-t-il exactement ?<\/strong><\/p>\n\n\n\n<p>Dans l&rsquo;air, l&rsquo;argent s&rsquo;oxyde. On conna\u00eet ce ph\u00e9nom\u00e8ne dans le m\u00e9nage : les couverts en argent noircissent au contact de l&rsquo;air. D&rsquo;un point de vue chimique, il se forme de l&rsquo;oxyde d&rsquo;argent. Celui-ci se pr\u00e9sente sous forme d&rsquo;ions :<\/p>\n\n\n\n<p>2 Ag<sup>0<\/sup>&nbsp;-&gt; 2 Ag<sup>+<\/sup>&nbsp;+ 4 e<sup>\u2013<\/sup><\/p>\n\n\n\n<p>Ce processus se poursuit jusqu&rsquo;\u00e0 ce qu&rsquo;un \u00e9quilibre entre l&rsquo;argent \u00e9l\u00e9mentaire et les ions d&rsquo;argent soit atteint. Un gaz est alors ajout\u00e9, qui r\u00e9agit avec les ions d&rsquo;argent : H<sub>2<\/sub>S + 2 Ag<sup>+<\/sup>&nbsp;-&gt; Ag<sub>2<\/sub>S\u2193 + 2 H<sup>+<\/sup><\/p>\n\n\n\n<p>Le sulfure d&rsquo;argent est insoluble. Des ions sont ainsi retir\u00e9s de l&rsquo;\u00e9quilibre. L&rsquo;\u00e9lectrode de travail est oblig\u00e9e de produire de nouveaux ions, et donc des \u00e9lectrons, qui circulent \u00e0 travers l&rsquo;appareil de mesure vers la contre-\u00e9lectrode. Un courant de quelques nA circule.<\/p>\n\n\n\n<p>Comme chaque mol\u00e9cule de gaz g\u00e9n\u00e8re un nombre d&rsquo;\u00e9lectrons bien pr\u00e9cis, le courant est proportionnel au nombre de mol\u00e9cules de gaz qu&rsquo;elle rencontre. Il est maintenant facile de pr\u00e9dire ce que le capteur d\u00e9crit ci-dessus peut mesurer : Tous les gaz qui forment un sel insoluble avec l&rsquo;argent. En fait, cette technologie de capteur est utilis\u00e9e pour mesurer le H<sub>2<\/sub>S, le HCl, le HCN et le COCl<sub>2<\/sub>. Cette m\u00e9thode de mesure est donc tr\u00e8s sp\u00e9cifique. Elle est en outre si sensible qu&rsquo;elle permet de mesurer de mani\u00e8re fiable des gaz dont les valeurs limites sont tr\u00e8s basses.<\/p>\n\n\n\n<p>En choisissant les bons mat\u00e9riaux d&rsquo;\u00e9lectrode et le bon \u00e9lectrolyte, il est possible de d\u00e9velopper des capteurs cibl\u00e9s qui d\u00e9tectent des substances tr\u00e8s sp\u00e9cifiques. Malheureusement, toutes les substances ne sont pas suffisamment r\u00e9actives pour r\u00e9agir avec le gaz \u00e0 mesurer sans \u00e9nergie auxiliaire. C&rsquo;est pourquoi les capteurs \u00e9lectrochimiques sont principalement utilis\u00e9s pour mesurer les gaz toxiques inorganiques et l&rsquo;oxyg\u00e8ne.<\/p>\n\n\n<style>.wp-block-kadence-advancedheading.kt-adv-heading1924_9f0f8b-7c, .wp-block-kadence-advancedheading.kt-adv-heading1924_9f0f8b-7c[data-kb-block=\"kb-adv-heading1924_9f0f8b-7c\"]{margin-bottom:var(--global-kb-spacing-xs, 1rem);font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading1924_9f0f8b-7c mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading1924_9f0f8b-7c[data-kb-block=\"kb-adv-heading1924_9f0f8b-7c\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading1924_9f0f8b-7c img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading1924_9f0f8b-7c[data-kb-block=\"kb-adv-heading1924_9f0f8b-7c\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<p class=\"kt-adv-heading1924_9f0f8b-7c wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading1924_9f0f8b-7c\"><strong>Les capteurs \u00e9lectrochimiques pr\u00e9sentent certains avantages :<\/strong><\/p>\n\n\n<style>.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_42bf5f-34:not(.this-stops-third-party-issues){margin-top:0px;margin-bottom:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_42bf5f-34 ul.kt-svg-icon-list:not(.this-prevents-issues):not(.this-stops-third-party-issues):not(.tijsloc){margin-top:0px;margin-right:0px;margin-bottom:var(--global-kb-spacing-sm, 1.5rem);margin-left:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_42bf5f-34 ul.kt-svg-icon-list{grid-row-gap:12px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_42bf5f-34 .kb-svg-icon-wrap{font-size:24px;color:var(--global-palette1, #3182CE);}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_42bf5f-34 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap .kt-svg-icon-list-single{margin-right:18px;}.kt-svg-icon-list-items1924_42bf5f-34 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap, .kt-svg-icon-list-items1924_42bf5f-34 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap a{font-size:var(--global-kb-font-size-md, 1.25rem);}.kt-svg-icon-list-items1924_42bf5f-34 ul.kt-svg-icon-list .kt-svg-icon-list-level-0 .kt-svg-icon-list-single svg{font-size:20px;}<\/style>\n<div class=\"wp-block-kadence-iconlist kt-svg-icon-list-items kt-svg-icon-list-items1924_42bf5f-34 kt-svg-icon-list-columns-1 alignnone kt-list-icon-aligntop\"><ul class=\"kt-svg-icon-list\"><style>.kt-svg-icon-list-item-1924_15d553-bb .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_15d553-bb\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-up kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M104 224H24c-13.255 0-24 10.745-24 24v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V248c0-13.255-10.745-24-24-24zM64 472c-13.255 0-24-10.745-24-24s10.745-24 24-24 24 10.745 24 24-10.745 24-24 24zM384 81.452c0 42.416-25.97 66.208-33.277 94.548h101.723c33.397 0 59.397 27.746 59.553 58.098.084 17.938-7.546 37.249-19.439 49.197l-.11.11c9.836 23.337 8.237 56.037-9.308 79.469 8.681 25.895-.069 57.704-16.382 74.757 4.298 17.598 2.244 32.575-6.148 44.632C440.202 511.587 389.616 512 346.839 512l-2.845-.001c-48.287-.017-87.806-17.598-119.56-31.725-15.957-7.099-36.821-15.887-52.651-16.178-6.54-.12-11.783-5.457-11.783-11.998v-213.77c0-3.2 1.282-6.271 3.558-8.521 39.614-39.144 56.648-80.587 89.117-113.111 14.804-14.832 20.188-37.236 25.393-58.902C282.515 39.293 291.817 0 312 0c24 0 72 8 72 81.452z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Ils sont extr\u00eamement sensibles. Il est m\u00eame possible de d\u00e9tecter des concentrations de l&rsquo;ordre du ppb.<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-1924_9f5b4d-7a .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_9f5b4d-7a\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-up kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M104 224H24c-13.255 0-24 10.745-24 24v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V248c0-13.255-10.745-24-24-24zM64 472c-13.255 0-24-10.745-24-24s10.745-24 24-24 24 10.745 24 24-10.745 24-24 24zM384 81.452c0 42.416-25.97 66.208-33.277 94.548h101.723c33.397 0 59.397 27.746 59.553 58.098.084 17.938-7.546 37.249-19.439 49.197l-.11.11c9.836 23.337 8.237 56.037-9.308 79.469 8.681 25.895-.069 57.704-16.382 74.757 4.298 17.598 2.244 32.575-6.148 44.632C440.202 511.587 389.616 512 346.839 512l-2.845-.001c-48.287-.017-87.806-17.598-119.56-31.725-15.957-7.099-36.821-15.887-52.651-16.178-6.54-.12-11.783-5.457-11.783-11.998v-213.77c0-3.2 1.282-6.271 3.558-8.521 39.614-39.144 56.648-80.587 89.117-113.111 14.804-14.832 20.188-37.236 25.393-58.902C282.515 39.293 291.817 0 312 0c24 0 72 8 72 81.452z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Ils sont tr\u00e8s sp\u00e9cifiques<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-1924_795ef4-13 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_795ef4-13\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-up kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M104 224H24c-13.255 0-24 10.745-24 24v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V248c0-13.255-10.745-24-24-24zM64 472c-13.255 0-24-10.745-24-24s10.745-24 24-24 24 10.745 24 24-10.745 24-24 24zM384 81.452c0 42.416-25.97 66.208-33.277 94.548h101.723c33.397 0 59.397 27.746 59.553 58.098.084 17.938-7.546 37.249-19.439 49.197l-.11.11c9.836 23.337 8.237 56.037-9.308 79.469 8.681 25.895-.069 57.704-16.382 74.757 4.298 17.598 2.244 32.575-6.148 44.632C440.202 511.587 389.616 512 346.839 512l-2.845-.001c-48.287-.017-87.806-17.598-119.56-31.725-15.957-7.099-36.821-15.887-52.651-16.178-6.54-.12-11.783-5.457-11.783-11.998v-213.77c0-3.2 1.282-6.271 3.558-8.521 39.614-39.144 56.648-80.587 89.117-113.111 14.804-14.832 20.188-37.236 25.393-58.902C282.515 39.293 291.817 0 312 0c24 0 72 8 72 81.452z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Vous n&rsquo;avez pas besoin d&rsquo;\u00e9nergie auxiliaire<\/span><\/li>\n<\/ul><\/div>\n\n\n<style>.wp-block-kadence-advancedheading.kt-adv-heading1924_68bacb-51, .wp-block-kadence-advancedheading.kt-adv-heading1924_68bacb-51[data-kb-block=\"kb-adv-heading1924_68bacb-51\"]{margin-bottom:var(--global-kb-spacing-xs, 1rem);font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading1924_68bacb-51 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading1924_68bacb-51[data-kb-block=\"kb-adv-heading1924_68bacb-51\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading1924_68bacb-51 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading1924_68bacb-51[data-kb-block=\"kb-adv-heading1924_68bacb-51\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<p class=\"kt-adv-heading1924_68bacb-51 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading1924_68bacb-51\"><strong>Bien s\u00fbr, il y a aussi des inconv\u00e9nients :<\/strong><\/p>\n\n\n<style>.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_cd8115-39:not(.this-stops-third-party-issues){margin-top:0px;margin-bottom:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_cd8115-39 ul.kt-svg-icon-list:not(.this-prevents-issues):not(.this-stops-third-party-issues):not(.tijsloc){margin-top:0px;margin-right:0px;margin-bottom:var(--global-kb-spacing-sm, 1.5rem);margin-left:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_cd8115-39 ul.kt-svg-icon-list{grid-row-gap:12px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_cd8115-39 .kb-svg-icon-wrap{font-size:24px;color:var(--global-palette5, #4A5568);}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_cd8115-39 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap .kt-svg-icon-list-single{margin-right:18px;}.kt-svg-icon-list-items1924_cd8115-39 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap, .kt-svg-icon-list-items1924_cd8115-39 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap a{font-size:var(--global-kb-font-size-md, 1.25rem);}.kt-svg-icon-list-items1924_cd8115-39 ul.kt-svg-icon-list .kt-svg-icon-list-level-0 .kt-svg-icon-list-single svg{font-size:20px;}<\/style>\n<div class=\"wp-block-kadence-iconlist kt-svg-icon-list-items kt-svg-icon-list-items1924_cd8115-39 kt-svg-icon-list-columns-1 alignnone kt-list-icon-aligntop\"><ul class=\"kt-svg-icon-list\"><style>.kt-svg-icon-list-item-1924_604f0a-15 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_604f0a-15\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-down kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M0 56v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V56c0-13.255-10.745-24-24-24H24C10.745 32 0 42.745 0 56zm40 200c0-13.255 10.745-24 24-24s24 10.745 24 24-10.745 24-24 24-24-10.745-24-24zm272 256c-20.183 0-29.485-39.293-33.931-57.795-5.206-21.666-10.589-44.07-25.393-58.902-32.469-32.524-49.503-73.967-89.117-113.111a11.98 11.98 0 0 1-3.558-8.521V59.901c0-6.541 5.243-11.878 11.783-11.998 15.831-.29 36.694-9.079 52.651-16.178C256.189 17.598 295.709.017 343.995 0h2.844c42.777 0 93.363.413 113.774 29.737 8.392 12.057 10.446 27.034 6.148 44.632 16.312 17.053 25.063 48.863 16.382 74.757 17.544 23.432 19.143 56.132 9.308 79.469l.11.11c11.893 11.949 19.523 31.259 19.439 49.197-.156 30.352-26.157 58.098-59.553 58.098H350.723C358.03 364.34 384 388.132 384 430.548 384 504 336 512 312 512z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Ils ne mesurent que les gaz r\u00e9actifs, en r\u00e8gle g\u00e9n\u00e9rale pas les hydrocarbures.<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-1924_5ebe85-4d .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_5ebe85-4d\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-down kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M0 56v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V56c0-13.255-10.745-24-24-24H24C10.745 32 0 42.745 0 56zm40 200c0-13.255 10.745-24 24-24s24 10.745 24 24-10.745 24-24 24-24-10.745-24-24zm272 256c-20.183 0-29.485-39.293-33.931-57.795-5.206-21.666-10.589-44.07-25.393-58.902-32.469-32.524-49.503-73.967-89.117-113.111a11.98 11.98 0 0 1-3.558-8.521V59.901c0-6.541 5.243-11.878 11.783-11.998 15.831-.29 36.694-9.079 52.651-16.178C256.189 17.598 295.709.017 343.995 0h2.844c42.777 0 93.363.413 113.774 29.737 8.392 12.057 10.446 27.034 6.148 44.632 16.312 17.053 25.063 48.863 16.382 74.757 17.544 23.432 19.143 56.132 9.308 79.469l.11.11c11.893 11.949 19.523 31.259 19.439 49.197-.156 30.352-26.157 58.098-59.553 58.098H350.723C358.03 364.34 384 388.132 384 430.548 384 504 336 512 312 512z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Ils sont bon march\u00e9<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-1924_f8cbff-46 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_f8cbff-46\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-down kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M0 56v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V56c0-13.255-10.745-24-24-24H24C10.745 32 0 42.745 0 56zm40 200c0-13.255 10.745-24 24-24s24 10.745 24 24-10.745 24-24 24-24-10.745-24-24zm272 256c-20.183 0-29.485-39.293-33.931-57.795-5.206-21.666-10.589-44.07-25.393-58.902-32.469-32.524-49.503-73.967-89.117-113.111a11.98 11.98 0 0 1-3.558-8.521V59.901c0-6.541 5.243-11.878 11.783-11.998 15.831-.29 36.694-9.079 52.651-16.178C256.189 17.598 295.709.017 343.995 0h2.844c42.777 0 93.363.413 113.774 29.737 8.392 12.057 10.446 27.034 6.148 44.632 16.312 17.053 25.063 48.863 16.382 74.757 17.544 23.432 19.143 56.132 9.308 79.469l.11.11c11.893 11.949 19.523 31.259 19.439 49.197-.156 30.352-26.157 58.098-59.553 58.098H350.723C358.03 364.34 384 388.132 384 430.548 384 504 336 512 312 512z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Le signal du capteur est directement proportionnel \u00e0 la concentration<\/span><\/li>\n<\/ul><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"a10\">3.2 Capteurs PID<\/h3>\n\n\n\n<p>Les capteurs PID utilisent le fait que la lumi\u00e8re UV de tr\u00e8s haute \u00e9nergie d\u00e9compose les mol\u00e9cules de gaz en radicaux. Ceux-ci sont charg\u00e9s \u00e9lectriquement. On peut facilement compter les particules charg\u00e9es en les faisant passer \u00e0 travers une cuvette dont la paroi est charg\u00e9e \u00e9lectriquement. Les particules charg\u00e9es positivement sont attir\u00e9es par l&rsquo;\u00e9lectrode charg\u00e9e n\u00e9gativement et inversement. Elles y compensent leur charge \u00e9lectrique. Le courant de d\u00e9charge est proportionnel au nombre de mol\u00e9cules, c&rsquo;est-\u00e0-dire \u00e0 la concentration.<\/p>\n\n\n<style>.kb-row-layout-id1924_e1eae4-62 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id1924_e1eae4-62 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id1924_e1eae4-62 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);padding-top:0px;padding-bottom:var(--global-kb-spacing-md, 2rem);grid-template-columns:repeat(2, minmax(0, 1fr));}.kb-row-layout-id1924_e1eae4-62 > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-id1924_e1eae4-62 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 767px){.kb-row-layout-id1924_e1eae4-62 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id1924_e1eae4-62 alignnone wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-row-layout-equal kt-tab-layout-row kt-mobile-layout-row kt-row-valign-top kt-inner-column-height-full\">\n<style>.kadence-column1924_56fe93-68 > .kt-inside-inner-col,.kadence-column1924_56fe93-68 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column1924_56fe93-68 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column1924_56fe93-68 > .kt-inside-inner-col{flex-direction:column;}.kadence-column1924_56fe93-68 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column1924_56fe93-68 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column1924_56fe93-68{position:relative;}@media all and (max-width: 1024px){.kadence-column1924_56fe93-68 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column1924_56fe93-68 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column1924_56fe93-68\"><div class=\"kt-inside-inner-col\">\n<p>Les sources UV utilis\u00e9es sont des lampes de 10,6 ou 11,7 eV. Cette \u00e9nergie n&rsquo;est pas suffisante pour ioniser les mol\u00e9cules d&rsquo;eau, d&rsquo;oxyg\u00e8ne ou d&rsquo;azote. Le PID ne r\u00e9agit donc pas aux substances qui sont de toute fa\u00e7on pr\u00e9sentes dans l&rsquo;air. Or, ces substances sont tr\u00e8s nombreuses, notamment les hydrocarbures. Malheureusement, elles sont toutes affich\u00e9es avec des sensibilit\u00e9s diff\u00e9rentes.<\/p>\n\n\n\n<p>La plupart de ces substances sont des liquides. On essaie autant que possible d&rsquo;\u00e9viter un \u00e9talonnage avec un liquide. On s&rsquo;est donc mis d&rsquo;accord pour toujours calibrer avec de l&rsquo;isobut\u00e8ne et pour d\u00e9terminer les facteurs de r\u00e9f\u00e9rence du plus grand nombre possible de substances par rapport \u00e0 l&rsquo;isobut\u00e8ne. Ainsi, on peut facilement calibrer avec un gaz. Ces facteurs sont disponibles dans la litt\u00e9rature, ou par exemple \u00e0 <a href=\"\/wp-content\/uploads\/Statox-501-PID-Response-Factors_D_E.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">t\u00e9l\u00e9charger ici<\/a>.<\/p>\n<\/div><\/div>\n\n\n<style>.kadence-column1924_ba90c8-66 > .kt-inside-inner-col,.kadence-column1924_ba90c8-66 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column1924_ba90c8-66 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column1924_ba90c8-66 > .kt-inside-inner-col{flex-direction:column;}.kadence-column1924_ba90c8-66 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column1924_ba90c8-66 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column1924_ba90c8-66{position:relative;}@media all and (max-width: 1024px){.kadence-column1924_ba90c8-66 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column1924_ba90c8-66 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column1924_ba90c8-66\"><div class=\"kt-inside-inner-col\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"294\" src=\"https:\/\/www.compur.com\/wp-content\/uploads\/pid-funktionsschema.jpg\" alt=\"PID Funktionsschema\" class=\"wp-image-1433\"\/><figcaption class=\"wp-element-caption\">Sch\u00e9ma de fonctionnement du PID (source : 2015 ABGS GmbH &#8211; Dipl.-Ing. Dieter Seyfert)<\/figcaption><\/figure>\n<\/div><\/div><\/div>\n\n<\/div><\/div>\n\n<style>.wp-block-kadence-advancedheading.kt-adv-heading1924_4fc7a2-64, .wp-block-kadence-advancedheading.kt-adv-heading1924_4fc7a2-64[data-kb-block=\"kb-adv-heading1924_4fc7a2-64\"]{margin-bottom:var(--global-kb-spacing-xs, 1rem);font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading1924_4fc7a2-64 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading1924_4fc7a2-64[data-kb-block=\"kb-adv-heading1924_4fc7a2-64\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading1924_4fc7a2-64 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading1924_4fc7a2-64[data-kb-block=\"kb-adv-heading1924_4fc7a2-64\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<p class=\"kt-adv-heading1924_4fc7a2-64 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading1924_4fc7a2-64\"><strong>Les capteurs PID pr\u00e9sentent certains avantages :<\/strong><\/p>\n\n\n<style>.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_4aa47b-99:not(.this-stops-third-party-issues){margin-top:0px;margin-bottom:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_4aa47b-99 ul.kt-svg-icon-list:not(.this-prevents-issues):not(.this-stops-third-party-issues):not(.tijsloc){margin-top:0px;margin-right:0px;margin-bottom:var(--global-kb-spacing-sm, 1.5rem);margin-left:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_4aa47b-99 ul.kt-svg-icon-list{grid-row-gap:12px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_4aa47b-99 .kb-svg-icon-wrap{font-size:24px;color:var(--global-palette1, #3182CE);}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_4aa47b-99 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap .kt-svg-icon-list-single{margin-right:18px;}.kt-svg-icon-list-items1924_4aa47b-99 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap, .kt-svg-icon-list-items1924_4aa47b-99 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap a{font-size:var(--global-kb-font-size-md, 1.25rem);}.kt-svg-icon-list-items1924_4aa47b-99 ul.kt-svg-icon-list .kt-svg-icon-list-level-0 .kt-svg-icon-list-single svg{font-size:20px;}<\/style>\n<div class=\"wp-block-kadence-iconlist kt-svg-icon-list-items kt-svg-icon-list-items1924_4aa47b-99 kt-svg-icon-list-columns-1 alignnone kt-list-icon-aligntop\"><ul class=\"kt-svg-icon-list\"><style>.kt-svg-icon-list-item-1924_da32ee-8a .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_da32ee-8a\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-up kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M104 224H24c-13.255 0-24 10.745-24 24v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V248c0-13.255-10.745-24-24-24zM64 472c-13.255 0-24-10.745-24-24s10.745-24 24-24 24 10.745 24 24-10.745 24-24 24zM384 81.452c0 42.416-25.97 66.208-33.277 94.548h101.723c33.397 0 59.397 27.746 59.553 58.098.084 17.938-7.546 37.249-19.439 49.197l-.11.11c9.836 23.337 8.237 56.037-9.308 79.469 8.681 25.895-.069 57.704-16.382 74.757 4.298 17.598 2.244 32.575-6.148 44.632C440.202 511.587 389.616 512 346.839 512l-2.845-.001c-48.287-.017-87.806-17.598-119.56-31.725-15.957-7.099-36.821-15.887-52.651-16.178-6.54-.12-11.783-5.457-11.783-11.998v-213.77c0-3.2 1.282-6.271 3.558-8.521 39.614-39.144 56.648-80.587 89.117-113.111 14.804-14.832 20.188-37.236 25.393-58.902C282.515 39.293 291.817 0 312 0c24 0 72 8 72 81.452z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Ils sont extr\u00eamement sensibles. Il est m\u00eame possible de d\u00e9tecter des concentrations de l&rsquo;ordre du ppb.<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-1924_75d2d9-5c .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_75d2d9-5c\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-up kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M104 224H24c-13.255 0-24 10.745-24 24v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V248c0-13.255-10.745-24-24-24zM64 472c-13.255 0-24-10.745-24-24s10.745-24 24-24 24 10.745 24 24-10.745 24-24 24zM384 81.452c0 42.416-25.97 66.208-33.277 94.548h101.723c33.397 0 59.397 27.746 59.553 58.098.084 17.938-7.546 37.249-19.439 49.197l-.11.11c9.836 23.337 8.237 56.037-9.308 79.469 8.681 25.895-.069 57.704-16.382 74.757 4.298 17.598 2.244 32.575-6.148 44.632C440.202 511.587 389.616 512 346.839 512l-2.845-.001c-48.287-.017-87.806-17.598-119.56-31.725-15.957-7.099-36.821-15.887-52.651-16.178-6.54-.12-11.783-5.457-11.783-11.998v-213.77c0-3.2 1.282-6.271 3.558-8.521 39.614-39.144 56.648-80.587 89.117-113.111 14.804-14.832 20.188-37.236 25.393-58.902C282.515 39.293 291.817 0 312 0c24 0 72 8 72 81.452z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Ils ont une bande passante tr\u00e8s large, ce qui permet de mesurer un grand nombre de substances.<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-1924_42ac9e-61 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_42ac9e-61\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-up kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M104 224H24c-13.255 0-24 10.745-24 24v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V248c0-13.255-10.745-24-24-24zM64 472c-13.255 0-24-10.745-24-24s10.745-24 24-24 24 10.745 24 24-10.745 24-24 24zM384 81.452c0 42.416-25.97 66.208-33.277 94.548h101.723c33.397 0 59.397 27.746 59.553 58.098.084 17.938-7.546 37.249-19.439 49.197l-.11.11c9.836 23.337 8.237 56.037-9.308 79.469 8.681 25.895-.069 57.704-16.382 74.757 4.298 17.598 2.244 32.575-6.148 44.632C440.202 511.587 389.616 512 346.839 512l-2.845-.001c-48.287-.017-87.806-17.598-119.56-31.725-15.957-7.099-36.821-15.887-52.651-16.178-6.54-.12-11.783-5.457-11.783-11.998v-213.77c0-3.2 1.282-6.271 3.558-8.521 39.614-39.144 56.648-80.587 89.117-113.111 14.804-14.832 20.188-37.236 25.393-58.902C282.515 39.293 291.817 0 312 0c24 0 72 8 72 81.452z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Ils mesurent \u00e9galement des gaz relativement inertes<\/span><\/li>\n<\/ul><\/div>\n\n\n<style>.wp-block-kadence-advancedheading.kt-adv-heading1924_baaa87-75, .wp-block-kadence-advancedheading.kt-adv-heading1924_baaa87-75[data-kb-block=\"kb-adv-heading1924_baaa87-75\"]{margin-bottom:var(--global-kb-spacing-xs, 1rem);font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading1924_baaa87-75 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading1924_baaa87-75[data-kb-block=\"kb-adv-heading1924_baaa87-75\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading1924_baaa87-75 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading1924_baaa87-75[data-kb-block=\"kb-adv-heading1924_baaa87-75\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<p class=\"kt-adv-heading1924_baaa87-75 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading1924_baaa87-75\"><strong>Bien s\u00fbr, il y a aussi des inconv\u00e9nients :<\/strong><\/p>\n\n\n<style>.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_820003-6e:not(.this-stops-third-party-issues){margin-top:0px;margin-bottom:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_820003-6e ul.kt-svg-icon-list:not(.this-prevents-issues):not(.this-stops-third-party-issues):not(.tijsloc){margin-top:0px;margin-right:0px;margin-bottom:var(--global-kb-spacing-sm, 1.5rem);margin-left:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_820003-6e ul.kt-svg-icon-list{grid-row-gap:12px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_820003-6e .kb-svg-icon-wrap{font-size:24px;color:var(--global-palette5, #4A5568);}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_820003-6e ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap .kt-svg-icon-list-single{margin-right:18px;}.kt-svg-icon-list-items1924_820003-6e ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap, .kt-svg-icon-list-items1924_820003-6e ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap a{font-size:var(--global-kb-font-size-md, 1.25rem);}.kt-svg-icon-list-items1924_820003-6e ul.kt-svg-icon-list .kt-svg-icon-list-level-0 .kt-svg-icon-list-single svg{font-size:20px;}<\/style>\n<div class=\"wp-block-kadence-iconlist kt-svg-icon-list-items kt-svg-icon-list-items1924_820003-6e kt-svg-icon-list-columns-1 alignnone kt-list-icon-aligntop\"><ul class=\"kt-svg-icon-list\"><style>.kt-svg-icon-list-item-1924_b742a6-9e .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_b742a6-9e\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-down kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M0 56v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V56c0-13.255-10.745-24-24-24H24C10.745 32 0 42.745 0 56zm40 200c0-13.255 10.745-24 24-24s24 10.745 24 24-10.745 24-24 24-24-10.745-24-24zm272 256c-20.183 0-29.485-39.293-33.931-57.795-5.206-21.666-10.589-44.07-25.393-58.902-32.469-32.524-49.503-73.967-89.117-113.111a11.98 11.98 0 0 1-3.558-8.521V59.901c0-6.541 5.243-11.878 11.783-11.998 15.831-.29 36.694-9.079 52.651-16.178C256.189 17.598 295.709.017 343.995 0h2.844c42.777 0 93.363.413 113.774 29.737 8.392 12.057 10.446 27.034 6.148 44.632 16.312 17.053 25.063 48.863 16.382 74.757 17.544 23.432 19.143 56.132 9.308 79.469l.11.11c11.893 11.949 19.523 31.259 19.439 49.197-.156 30.352-26.157 58.098-59.553 58.098H350.723C358.03 364.34 384 388.132 384 430.548 384 504 336 512 312 512z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Ils mesurent de mani\u00e8re tr\u00e8s peu sp\u00e9cifique<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-1924_f04414-a4 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_f04414-a4\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-down kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M0 56v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V56c0-13.255-10.745-24-24-24H24C10.745 32 0 42.745 0 56zm40 200c0-13.255 10.745-24 24-24s24 10.745 24 24-10.745 24-24 24-24-10.745-24-24zm272 256c-20.183 0-29.485-39.293-33.931-57.795-5.206-21.666-10.589-44.07-25.393-58.902-32.469-32.524-49.503-73.967-89.117-113.111a11.98 11.98 0 0 1-3.558-8.521V59.901c0-6.541 5.243-11.878 11.783-11.998 15.831-.29 36.694-9.079 52.651-16.178C256.189 17.598 295.709.017 343.995 0h2.844c42.777 0 93.363.413 113.774 29.737 8.392 12.057 10.446 27.034 6.148 44.632 16.312 17.053 25.063 48.863 16.382 74.757 17.544 23.432 19.143 56.132 9.308 79.469l.11.11c11.893 11.949 19.523 31.259 19.439 49.197-.156 30.352-26.157 58.098-59.553 58.098H350.723C358.03 364.34 384 388.132 384 430.548 384 504 336 512 312 512z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">La lampe est une pi\u00e8ce d&rsquo;usure<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-1924_64c97c-8a .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_64c97c-8a\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-down kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M0 56v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V56c0-13.255-10.745-24-24-24H24C10.745 32 0 42.745 0 56zm40 200c0-13.255 10.745-24 24-24s24 10.745 24 24-10.745 24-24 24-24-10.745-24-24zm272 256c-20.183 0-29.485-39.293-33.931-57.795-5.206-21.666-10.589-44.07-25.393-58.902-32.469-32.524-49.503-73.967-89.117-113.111a11.98 11.98 0 0 1-3.558-8.521V59.901c0-6.541 5.243-11.878 11.783-11.998 15.831-.29 36.694-9.079 52.651-16.178C256.189 17.598 295.709.017 343.995 0h2.844c42.777 0 93.363.413 113.774 29.737 8.392 12.057 10.446 27.034 6.148 44.632 16.312 17.053 25.063 48.863 16.382 74.757 17.544 23.432 19.143 56.132 9.308 79.469l.11.11c11.893 11.949 19.523 31.259 19.439 49.197-.156 30.352-26.157 58.098-59.553 58.098H350.723C358.03 364.34 384 388.132 384 430.548 384 504 336 512 312 512z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Lors de la mesure de m\u00e9langes, ils ne fournissent qu&rsquo;un signal de somme<\/span><\/li>\n<\/ul><\/div>\n\n\n<style>.wp-block-kadence-advancedbtn.kb-btns1924_f1cb19-34{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:flex-start;align-items:center;}.kt-btns1924_f1cb19-34 .kt-button{font-weight:normal;font-style:normal;}.kt-btns1924_f1cb19-34 .kt-btn-wrap-0{margin-right:5px;}.wp-block-kadence-advancedbtn.kt-btns1924_f1cb19-34 .kt-btn-wrap-0 .kt-button{color:#555555;border-color:#555555;}.wp-block-kadence-advancedbtn.kt-btns1924_f1cb19-34 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns1924_f1cb19-34 .kt-btn-wrap-0 .kt-button:focus{color:#ffffff;border-color:#444444;}.wp-block-kadence-advancedbtn.kt-btns1924_f1cb19-34 .kt-btn-wrap-0 .kt-button::before{display:none;}.wp-block-kadence-advancedbtn.kt-btns1924_f1cb19-34 .kt-btn-wrap-0 .kt-button:hover, .wp-block-kadence-advancedbtn.kt-btns1924_f1cb19-34 .kt-btn-wrap-0 .kt-button:focus{background:#444444;}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns1924_f1cb19-34\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn1924_7725fa-16.kb-button{width:initial;}.wp-block-kadence-advancedbtn .kb-btn1924_7725fa-16.kb-button{color:var(--global-palette9, #ffffff);background:var(--global-palette1, #3182CE);font-size:var(--global-kb-font-size-md, 1.25rem);font-family:var( --global-body-font-family, inherit );font-weight:700;border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;margin-top:var(--global-kb-spacing-sm, 1.5rem);}.wp-block-kadence-advancedbtn .kb-btn1924_7725fa-16.kb-button:hover, .wp-block-kadence-advancedbtn .kb-btn1924_7725fa-16.kb-button:focus{color:var(--global-palette3, #1A202C);background:var(--global-palette2, #2B6CB0);}<\/style><a class=\"kb-button kt-button button kb-btn1924_7725fa-16 kt-btn-size-standard kt-btn-width-type-auto kb-btn-global-fill  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-kadence-singlebtn\" href=\"#kontakt\"><span class=\"kt-btn-inner-text\">Prendre contact sans engagement<\/span><\/a><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"a11\">3.3 Capteurs de conductivit\u00e9 thermique<\/h3>\n\n\n\n<p>De nombreux gaz conduisent diff\u00e9remment la chaleur par rapport \u00e0 l&rsquo;air. On peut utiliser cet effet pour d\u00e9terminer la concentration en mesurant la conductivit\u00e9 thermique de l&rsquo;atmosph\u00e8re.<\/p>\n\n\n<style>.kb-row-layout-id1924_208d73-be > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id1924_208d73-be > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id1924_208d73-be > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);padding-top:0px;padding-bottom:var(--global-kb-spacing-md, 2rem);grid-template-columns:repeat(2, minmax(0, 1fr));}.kb-row-layout-id1924_208d73-be > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-id1924_208d73-be > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 767px){.kb-row-layout-id1924_208d73-be > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id1924_208d73-be alignnone wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-row-layout-equal kt-tab-layout-row kt-mobile-layout-row kt-row-valign-top kt-inner-column-height-full\">\n<style>.kadence-column1924_0796b4-b4 > .kt-inside-inner-col,.kadence-column1924_0796b4-b4 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column1924_0796b4-b4 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column1924_0796b4-b4 > .kt-inside-inner-col{flex-direction:column;}.kadence-column1924_0796b4-b4 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column1924_0796b4-b4 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column1924_0796b4-b4{position:relative;}@media all and (max-width: 1024px){.kadence-column1924_0796b4-b4 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column1924_0796b4-b4 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column1924_0796b4-b4\"><div class=\"kt-inside-inner-col\">\n<p>Pour cela, on place une source de chaleur et un thermom\u00e8tre dans une cellule travers\u00e9e par un courant. Ici aussi, on utilise une cellule de r\u00e9f\u00e9rence pour compenser les influences de la temp\u00e9rature (bien s\u00fbr extr\u00eamement importante ici), de l&rsquo;humidit\u00e9 et de la pression.<\/p>\n\n\n\n<p>Si l&rsquo;\u00e9chantillon dans la cellule de mesure contient un gaz qui conduit mieux ou moins bien la chaleur que l&rsquo;air, le thermom\u00e8tre de la cellule de mesure mesurera une autre valeur.<\/p>\n<\/div><\/div>\n\n\n<style>.kadence-column1924_94db5a-eb > .kt-inside-inner-col,.kadence-column1924_94db5a-eb > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column1924_94db5a-eb > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column1924_94db5a-eb > .kt-inside-inner-col{flex-direction:column;}.kadence-column1924_94db5a-eb > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column1924_94db5a-eb > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column1924_94db5a-eb{position:relative;}@media all and (max-width: 1024px){.kadence-column1924_94db5a-eb > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column1924_94db5a-eb > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column1924_94db5a-eb\"><div class=\"kt-inside-inner-col\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"279\" height=\"180\" src=\"https:\/\/www.compur.com\/wp-content\/uploads\/waermeleitfaehigkeitssensoren.jpg\" alt=\"Quelle: Chemie \u2013 Schule.de\" class=\"wp-image-1437\"\/><figcaption class=\"wp-element-caption\">Source : Chimie &#8211; Schule.de<\/figcaption><\/figure>\n<\/div><\/div><\/div>\n\n<\/div><\/div>\n\n<style>.wp-block-kadence-advancedheading.kt-adv-heading1924_133419-79, .wp-block-kadence-advancedheading.kt-adv-heading1924_133419-79[data-kb-block=\"kb-adv-heading1924_133419-79\"]{margin-bottom:var(--global-kb-spacing-xs, 1rem);font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading1924_133419-79 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading1924_133419-79[data-kb-block=\"kb-adv-heading1924_133419-79\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading1924_133419-79 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading1924_133419-79[data-kb-block=\"kb-adv-heading1924_133419-79\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<p class=\"kt-adv-heading1924_133419-79 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading1924_133419-79\"><strong>Les capteurs de conductivit\u00e9 thermique pr\u00e9sentent plusieurs avantages :<\/strong><\/p>\n\n\n<style>.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_cd1b19-47:not(.this-stops-third-party-issues){margin-top:0px;margin-bottom:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_cd1b19-47 ul.kt-svg-icon-list:not(.this-prevents-issues):not(.this-stops-third-party-issues):not(.tijsloc){margin-top:0px;margin-right:0px;margin-bottom:var(--global-kb-spacing-sm, 1.5rem);margin-left:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_cd1b19-47 ul.kt-svg-icon-list{grid-row-gap:12px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_cd1b19-47 .kb-svg-icon-wrap{font-size:24px;color:var(--global-palette1, #3182CE);}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_cd1b19-47 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap .kt-svg-icon-list-single{margin-right:18px;}.kt-svg-icon-list-items1924_cd1b19-47 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap, .kt-svg-icon-list-items1924_cd1b19-47 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap a{font-size:var(--global-kb-font-size-md, 1.25rem);}.kt-svg-icon-list-items1924_cd1b19-47 ul.kt-svg-icon-list .kt-svg-icon-list-level-0 .kt-svg-icon-list-single svg{font-size:20px;}<\/style>\n<div class=\"wp-block-kadence-iconlist kt-svg-icon-list-items kt-svg-icon-list-items1924_cd1b19-47 kt-svg-icon-list-columns-1 alignnone kt-list-icon-aligntop\"><ul class=\"kt-svg-icon-list\"><style>.kt-svg-icon-list-item-1924_5c05d8-03 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_5c05d8-03\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-up kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M104 224H24c-13.255 0-24 10.745-24 24v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V248c0-13.255-10.745-24-24-24zM64 472c-13.255 0-24-10.745-24-24s10.745-24 24-24 24 10.745 24 24-10.745 24-24 24zM384 81.452c0 42.416-25.97 66.208-33.277 94.548h101.723c33.397 0 59.397 27.746 59.553 58.098.084 17.938-7.546 37.249-19.439 49.197l-.11.11c9.836 23.337 8.237 56.037-9.308 79.469 8.681 25.895-.069 57.704-16.382 74.757 4.298 17.598 2.244 32.575-6.148 44.632C440.202 511.587 389.616 512 346.839 512l-2.845-.001c-48.287-.017-87.806-17.598-119.56-31.725-15.957-7.099-36.821-15.887-52.651-16.178-6.54-.12-11.783-5.457-11.783-11.998v-213.77c0-3.2 1.282-6.271 3.558-8.521 39.614-39.144 56.648-80.587 89.117-113.111 14.804-14.832 20.188-37.236 25.393-58.902C282.515 39.293 291.817 0 312 0c24 0 72 8 72 81.452z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Ils sont extr\u00eamement robustes<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-1924_364628-ba .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_364628-ba\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-up kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M104 224H24c-13.255 0-24 10.745-24 24v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V248c0-13.255-10.745-24-24-24zM64 472c-13.255 0-24-10.745-24-24s10.745-24 24-24 24 10.745 24 24-10.745 24-24 24zM384 81.452c0 42.416-25.97 66.208-33.277 94.548h101.723c33.397 0 59.397 27.746 59.553 58.098.084 17.938-7.546 37.249-19.439 49.197l-.11.11c9.836 23.337 8.237 56.037-9.308 79.469 8.681 25.895-.069 57.704-16.382 74.757 4.298 17.598 2.244 32.575-6.148 44.632C440.202 511.587 389.616 512 346.839 512l-2.845-.001c-48.287-.017-87.806-17.598-119.56-31.725-15.957-7.099-36.821-15.887-52.651-16.178-6.54-.12-11.783-5.457-11.783-11.998v-213.77c0-3.2 1.282-6.271 3.558-8.521 39.614-39.144 56.648-80.587 89.117-113.111 14.804-14.832 20.188-37.236 25.393-58.902C282.515 39.293 291.817 0 312 0c24 0 72 8 72 81.452z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Ils sont tr\u00e8s larges<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-1924_9fd7d4-fd .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_9fd7d4-fd\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-up kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M104 224H24c-13.255 0-24 10.745-24 24v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V248c0-13.255-10.745-24-24-24zM64 472c-13.255 0-24-10.745-24-24s10.745-24 24-24 24 10.745 24 24-10.745 24-24 24zM384 81.452c0 42.416-25.97 66.208-33.277 94.548h101.723c33.397 0 59.397 27.746 59.553 58.098.084 17.938-7.546 37.249-19.439 49.197l-.11.11c9.836 23.337 8.237 56.037-9.308 79.469 8.681 25.895-.069 57.704-16.382 74.757 4.298 17.598 2.244 32.575-6.148 44.632C440.202 511.587 389.616 512 346.839 512l-2.845-.001c-48.287-.017-87.806-17.598-119.56-31.725-15.957-7.099-36.821-15.887-52.651-16.178-6.54-.12-11.783-5.457-11.783-11.998v-213.77c0-3.2 1.282-6.271 3.558-8.521 39.614-39.144 56.648-80.587 89.117-113.111 14.804-14.832 20.188-37.236 25.393-58.902C282.515 39.293 291.817 0 312 0c24 0 72 8 72 81.452z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Ils mesurent \u00e9galement les gaz inertes<\/span><\/li>\n<\/ul><\/div>\n\n\n<style>.wp-block-kadence-advancedheading.kt-adv-heading1924_445a95-92, .wp-block-kadence-advancedheading.kt-adv-heading1924_445a95-92[data-kb-block=\"kb-adv-heading1924_445a95-92\"]{margin-bottom:var(--global-kb-spacing-xs, 1rem);font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading1924_445a95-92 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading1924_445a95-92[data-kb-block=\"kb-adv-heading1924_445a95-92\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading1924_445a95-92 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading1924_445a95-92[data-kb-block=\"kb-adv-heading1924_445a95-92\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<p class=\"kt-adv-heading1924_445a95-92 wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading1924_445a95-92\"><strong>Bien s\u00fbr, il y a aussi des inconv\u00e9nients :<\/strong><\/p>\n\n\n<style>.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_56fb64-f6:not(.this-stops-third-party-issues){margin-top:0px;margin-bottom:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_56fb64-f6 ul.kt-svg-icon-list:not(.this-prevents-issues):not(.this-stops-third-party-issues):not(.tijsloc){margin-top:0px;margin-right:0px;margin-bottom:var(--global-kb-spacing-sm, 1.5rem);margin-left:0px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_56fb64-f6 ul.kt-svg-icon-list{grid-row-gap:12px;}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_56fb64-f6 .kb-svg-icon-wrap{font-size:24px;color:var(--global-palette5, #4A5568);}.wp-block-kadence-iconlist.kt-svg-icon-list-items1924_56fb64-f6 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap .kt-svg-icon-list-single{margin-right:18px;}.kt-svg-icon-list-items1924_56fb64-f6 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap, .kt-svg-icon-list-items1924_56fb64-f6 ul.kt-svg-icon-list .kt-svg-icon-list-item-wrap a{font-size:var(--global-kb-font-size-md, 1.25rem);}.kt-svg-icon-list-items1924_56fb64-f6 ul.kt-svg-icon-list .kt-svg-icon-list-level-0 .kt-svg-icon-list-single svg{font-size:20px;}<\/style>\n<div class=\"wp-block-kadence-iconlist kt-svg-icon-list-items kt-svg-icon-list-items1924_56fb64-f6 kt-svg-icon-list-columns-1 alignnone kt-list-icon-aligntop\"><ul class=\"kt-svg-icon-list\"><style>.kt-svg-icon-list-item-1924_261156-e8 .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_261156-e8\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-down kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M0 56v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V56c0-13.255-10.745-24-24-24H24C10.745 32 0 42.745 0 56zm40 200c0-13.255 10.745-24 24-24s24 10.745 24 24-10.745 24-24 24-24-10.745-24-24zm272 256c-20.183 0-29.485-39.293-33.931-57.795-5.206-21.666-10.589-44.07-25.393-58.902-32.469-32.524-49.503-73.967-89.117-113.111a11.98 11.98 0 0 1-3.558-8.521V59.901c0-6.541 5.243-11.878 11.783-11.998 15.831-.29 36.694-9.079 52.651-16.178C256.189 17.598 295.709.017 343.995 0h2.844c42.777 0 93.363.413 113.774 29.737 8.392 12.057 10.446 27.034 6.148 44.632 16.312 17.053 25.063 48.863 16.382 74.757 17.544 23.432 19.143 56.132 9.308 79.469l.11.11c11.893 11.949 19.523 31.259 19.439 49.197-.156 30.352-26.157 58.098-59.553 58.098H350.723C358.03 364.34 384 388.132 384 430.548 384 504 336 512 312 512z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Ils mesurent de mani\u00e8re tr\u00e8s peu sp\u00e9cifique<\/span><\/li>\n\n\n<style>.kt-svg-icon-list-item-1924_ae3dea-ae .kt-svg-icon-list-text mark.kt-highlight{background-color:unset;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}<\/style>\n<li class=\"wp-block-kadence-listitem kt-svg-icon-list-item-wrap kt-svg-icon-list-item-1924_ae3dea-ae\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fas_thumbs-down kt-svg-icon-list-single\"><svg viewBox=\"0 0 512 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M0 56v240c0 13.255 10.745 24 24 24h80c13.255 0 24-10.745 24-24V56c0-13.255-10.745-24-24-24H24C10.745 32 0 42.745 0 56zm40 200c0-13.255 10.745-24 24-24s24 10.745 24 24-10.745 24-24 24-24-10.745-24-24zm272 256c-20.183 0-29.485-39.293-33.931-57.795-5.206-21.666-10.589-44.07-25.393-58.902-32.469-32.524-49.503-73.967-89.117-113.111a11.98 11.98 0 0 1-3.558-8.521V59.901c0-6.541 5.243-11.878 11.783-11.998 15.831-.29 36.694-9.079 52.651-16.178C256.189 17.598 295.709.017 343.995 0h2.844c42.777 0 93.363.413 113.774 29.737 8.392 12.057 10.446 27.034 6.148 44.632 16.312 17.053 25.063 48.863 16.382 74.757 17.544 23.432 19.143 56.132 9.308 79.469l.11.11c11.893 11.949 19.523 31.259 19.439 49.197-.156 30.352-26.157 58.098-59.553 58.098H350.723C358.03 364.34 384 388.132 384 430.548 384 504 336 512 312 512z\"\/><\/svg><\/span><span class=\"kt-svg-icon-list-text\">Ils \u00e9chouent g\u00e9n\u00e9ralement lors de la mesure de m\u00e9langes, surtout lorsque des gaz de meilleure et de mauvaise conductivit\u00e9 peuvent \u00eatre pr\u00e9sents simultan\u00e9ment. Par exemple, les effets de mesure duCO<sub>2<\/sub> et du CH<sub>4<\/sub> peuvent, dans le pire des cas, s&rsquo;annuler mutuellement.<\/span><\/li>\n<\/ul><\/div>\n<\/div><\/div>\n\n<\/div><\/div>\n\n<style>.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id1953_64b170-26{margin-top:var(--global-kb-spacing-xxl, 5rem);margin-bottom:var(--global-kb-spacing-xxl, 5rem);}.kb-row-layout-id1953_64b170-26 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id1953_64b170-26 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id1953_64b170-26 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);max-width:var( --global-content-width, 1290px );padding-left:var(--global-content-edge-padding);padding-right:var(--global-content-edge-padding);padding-top:var(--global-kb-spacing-xxl, 5rem);padding-bottom:var(--global-kb-spacing-xl, 4rem);grid-template-columns:repeat(2, minmax(0, 1fr));}.kb-row-layout-id1953_64b170-26{border-top:2px solid var(--global-palette1, #3182CE);border-right:0px solid var(--global-palette1, #3182CE);border-bottom:2px solid var(--global-palette1, #3182CE);border-left:0px solid var(--global-palette1, #3182CE);}.kb-row-layout-id1953_64b170-26 > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id1953_64b170-26{margin-top:var(--global-kb-spacing-xl, 4rem);margin-bottom:var(--global-kb-spacing-xl, 4rem);}}@media all and (max-width: 1024px){.kb-row-layout-id1953_64b170-26 > .kt-row-column-wrap{padding-top:var(--global-kb-spacing-xl, 4rem);padding-bottom:var(--global-kb-spacing-lg, 3rem);grid-template-columns:repeat(2, minmax(0, 1fr));}}@media all and (max-width: 1024px){.kb-row-layout-id1953_64b170-26{border-top:2px solid var(--global-palette1, #3182CE);border-right:0px solid var(--global-palette1, #3182CE);border-bottom:2px solid var(--global-palette1, #3182CE);border-left:0px solid var(--global-palette1, #3182CE);}}@media all and (max-width: 767px){.kb-row-layout-id1953_64b170-26 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id1953_64b170-26{border-top:2px solid var(--global-palette1, #3182CE);border-right:0px solid var(--global-palette1, #3182CE);border-bottom:2px solid var(--global-palette1, #3182CE);border-left:0px solid var(--global-palette1, #3182CE);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id1953_64b170-26 alignnone has-theme-palette8-background-color kt-row-has-bg wp-block-kadence-rowlayout\" id=\"kontakt\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top kb-theme-content-width\">\n<style>.kadence-column1953_d08603-aa > .kt-inside-inner-col,.kadence-column1953_d08603-aa > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column1953_d08603-aa > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column1953_d08603-aa > .kt-inside-inner-col{flex-direction:column;}.kadence-column1953_d08603-aa > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column1953_d08603-aa > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column1953_d08603-aa{position:relative;}@media all and (max-width: 1024px){.kadence-column1953_d08603-aa > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column1953_d08603-aa > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column1953_d08603-aa\"><div class=\"kt-inside-inner-col\"><style>.kb-image1953_f55cb2-81.kb-image-is-ratio-size, .kb-image1953_f55cb2-81 .kb-image-is-ratio-size{max-width:300px;width:100%;}.wp-block-kadence-column > .kt-inside-inner-col > .kb-image1953_f55cb2-81.kb-image-is-ratio-size, .wp-block-kadence-column > .kt-inside-inner-col > .kb-image1953_f55cb2-81 .kb-image-is-ratio-size{align-self:unset;}.kb-image1953_f55cb2-81 figure{max-width:300px;}.kb-image1953_f55cb2-81 .image-is-svg, .kb-image1953_f55cb2-81 .image-is-svg img{width:100%;}.kb-image1953_f55cb2-81 .kb-image-has-overlay:after{opacity:0.3;}.kb-image1953_f55cb2-81 img.kb-img, .kb-image1953_f55cb2-81 .kb-img img{-webkit-mask-image:url(https:\/\/www.compur.com\/wp-content\/plugins\/kadence-blocks\/includes\/assets\/images\/masks\/circle.svg);mask-image:url(https:\/\/www.compur.com\/wp-content\/plugins\/kadence-blocks\/includes\/assets\/images\/masks\/circle.svg);-webkit-mask-size:auto;mask-size:auto;-webkit-mask-repeat:no-repeat;mask-repeat:no-repeat;-webkit-mask-position:center;mask-position:center;}<\/style>\n<div class=\"wp-block-kadence-image kb-image1953_f55cb2-81\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/www.compur.com\/wp-content\/uploads\/image-a-suivre-prochainement.jpg\" alt=\"image a suivre prochainement\" class=\"kb-img wp-image-5234\" srcset=\"https:\/\/www.compur.com\/wp-content\/uploads\/image-a-suivre-prochainement.jpg 800w, https:\/\/www.compur.com\/wp-content\/uploads\/image-a-suivre-prochainement-768x768.jpg 768w, https:\/\/www.compur.com\/wp-content\/uploads\/image-a-suivre-prochainement-384x384.jpg 384w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure><\/div>\n\n\n\n<p class=\"has-text-align-center eplus-wrapper\"><strong>Dr. Hermann Schmidtpott<\/strong><br>Directeur g\u00e9n\u00e9ral COMPUR MONITORS GmbH &amp; Co. KG<\/p>\n\n\n\n<p class=\"has-text-align-center eplus-wrapper\"><strong><a href=\"tel:00498962038256\">+49 89 62038256<\/a> \u00b7 <a href=\"mailto:compur@compur.de\">compur@compur.de<\/a><\/strong><\/p>\n<\/div><\/div>\n\n\n<style>.kadence-column1953_6aa495-42 > .kt-inside-inner-col,.kadence-column1953_6aa495-42 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column1953_6aa495-42 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column1953_6aa495-42 > .kt-inside-inner-col{flex-direction:column;}.kadence-column1953_6aa495-42 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column1953_6aa495-42 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column1953_6aa495-42{position:relative;}@media all and (max-width: 1024px){.kadence-column1953_6aa495-42 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column1953_6aa495-42 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column1953_6aa495-42\"><div class=\"kt-inside-inner-col\">\n<h3 class=\"wp-block-heading eplus-wrapper\">Contactez-nous sans engagement<\/h3>\n\n\n\n<p class=\"eplus-wrapper\">Vous avez des questions sur nos produits ou vous souhaitez un conseil sans engagement ? N&rsquo;h\u00e9sitez pas \u00e0 nous contacter.<\/p>\n\n\n<div class='fluentform ff-default fluentform_wrapper_5  ff_guten_block ff_guten_block-5 ffs_default_wrap'><form data-form_id=\"5\" id=\"fluentform_5\" class=\"frm-fluent-form fluent_form_5 ff-el-form-top ff_form_instance_5_1 ff-form-loading ffs_default\" data-form_instance=\"ff_form_instance_5_1\" method=\"POST\" ><fieldset  style=\"border: none!important;margin: 0!important;padding: 0!important;background-color: transparent!important;box-shadow: none!important;outline: none!important; min-inline-size: 100%;\">\n                    <legend class=\"ff_screen_reader_title\" style=\"display: block; margin: 0!important;padding: 0!important;height: 0!important;text-indent: -999999px;width: 0!important;overflow:hidden;\">Mini-Formular FR<\/legend>        <div\n                style=\"display: none!important; position: absolute!important; transform: translateX(1000%)!important;\"\n                class=\"ff-el-group 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Pourquoi a-t-on besoin de d\u00e9tecteurs de gaz ? Au cours de l&rsquo;\u00e9volution, l&rsquo;homme s&rsquo;est adapt\u00e9 \u00e0 l&rsquo;atmosph\u00e8re terrestre. L&rsquo;organisme humain fonctionne de mani\u00e8re optimale dans 21 % d&rsquo;oxyg\u00e8ne et 79 % d&rsquo;azote. 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Pourquoi a-t-on besoin de d\u00e9tecteurs de gaz ? Au cours de l&rsquo;\u00e9volution, l&rsquo;homme s&rsquo;est adapt\u00e9 \u00e0 l&rsquo;atmosph\u00e8re terrestre. L&rsquo;organisme humain fonctionne de mani\u00e8re optimale dans 21 % d&rsquo;oxyg\u00e8ne et 79 % d&rsquo;azote. 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