{"id":1366,"date":"2017-06-20T16:36:38","date_gmt":"2017-06-20T23:36:38","guid":{"rendered":""},"modified":"2025-07-25T07:41:24","modified_gmt":"2025-07-25T14:41:24","slug":"1366","status":"publish","type":"post","link":"https:\/\/www.vernier.com\/til\/1366","title":{"rendered":"CO\u2082 Gas Sensor Troubleshooting and FAQs"},"content":{"rendered":"<div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<h3 class=\"wp-block-heading\"><a href=\"\/product\/co2-gas-sensor\/\">CO<sub>2<\/sub> Gas Sensor<\/a> (<nobr>CO2-BTA<\/nobr>)<\/h3>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<p class=\"wp-block-paragraph\"><a href=\"\/manuals\/CO2-BTA\">Specifications and User Guide<\/a><\/p>\n<\/div>\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.vernier.com\/wp-content\/uploads\/2023\/07\/product.revised.co2-bta._hero._001.jpg\" alt=\"\"\/><\/figure>\n<\/div>\n<\/div>\n<p class=\"has-very-light-gray-background-color has-background wp-block-paragraph\"><strong><a href=\"\/til\/3351\/\">Which CO\u2082 Gas sensor do I have?<\/a><\/strong><br \/><small>There have been three versions of wired CO\u2082 Gas Sensors. One model was sold up to about January 2007, then replaced with another model from 2007 until May of 2023.\u00a0 The newest model was introduced in June 2023. Specifications for the different models are listed below.<\/small><\/p>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\">Troubleshooting<\/h3>\n<ul class=\"wp-block-list\">\n<li><strong>Primary Test: <\/strong>Plug in the sensor, start the data-collection program, and allow the sensor to warm up for at least 90 seconds. Blow directly on the shaft of the sensor. You should see an increase in CO\u2082 levels. The pre-2007 model will max out at 5000 ppm. The post-2007 models will max out at approximately 10,000 ppm if set to the Low Range and 100,000 ppm if set to the High Range (although your breath will probably not reach 100,000 ppm).<\/li>\n<li><strong>Secondary Test: <\/strong>If the CO\u2082 Gas Sensor is not giving reasonable readings in the Primary Test, try calibrating it. <strong>Note:<\/strong> If you recently blew into the sensor for the Primary Test, fan it with fresh air to clear it first.<\/li>\n<\/ul>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\">Additional Troubleshooting<\/h3>\n<ul class=\"wp-block-list\">\n<li><a href=\"\/til\/1519\/\">How to get good results with photosynthesis experiments when using a CO\u2082 Gas Sensor.<\/a><\/li>\n<li><a href=\"\/til\/2318\/\">Can I use a dishwasher to wash the Nalgene bottle that shipped with my O2 or CO2 Gas Sensor?<\/a><\/li>\n<li><a href=\"\/til\/2386\/\">How can I insert a CO2 Gas Sensor or O2 Gas Sensor into my own container?<\/a><\/li>\n<li><a href=\"\/til\/2943\/\">The calibration button on my CO2 Gas Sensor is unresponsive.<\/a><\/li>\n<li><a href=\"\/til\/2957\/\">My CO2 Gas Sensor no longer Auto-IDs.<\/a><\/li>\n<li><a href=\"\/til\/1927\/\">Why does my CO<sub>2<\/sub> sensor ID as a Current sensor when used with a Go!Link?<\/a><\/li>\n<li><a href=\"\/til\/3351\/\">Which CO\u2082 Gas sensor do I have?<\/a><\/li>\n<li><a href=\"\/til\/3845\/\">Can CO<sub>2<\/sub> gas concentrations be expressed in units of mg\/m\u00b3?<\/a><\/li>\n<li><a href=\"\/til\/4006\/\">What is the volume of gas displaced by the shaft of the CO<sub>2<\/sub> and O<sub>2<\/sub> Gas Sensor? What is the total volume of the Large and Small BioChambers?<\/a><\/li>\n<li><a href=\"\/til\/4339\/\">Can I autoclave the bottle that comes with my CO2 or O2 sensor?<\/a><\/li>\n<\/ul>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\"><span style=\"font-size: inherit;\">Specifications<\/span><\/h3>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<style>.kt-accordion-id1366_ad9097-1b10 .kt-accordion-inner-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:8px;}.kt-accordion-id1366_ad9097-1b10 .kt-accordion-panel-inner{border-top:1px solid #f79b2e;border-right:1px solid #f79b2e;border-bottom:1px solid #f79b2e;border-left:1px solid #f79b2e;padding-top:10px;padding-right:10px;padding-bottom:10px;padding-left:10px;}.kt-accordion-id1366_ad9097-1b10 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header{border-top:1px solid #cdcdc9;border-right:1px solid #cdcdc9;border-bottom:1px solid #cdcdc9;border-left:1px solid #cdcdc9;border-top-left-radius:2px;border-top-right-radius:2px;border-bottom-right-radius:2px;border-bottom-left-radius:2px;background:#cce8ea;font-size:18px;line-height:24px;color:#007377;padding-top:10px;padding-right:14px;padding-bottom:10px;padding-left:14px;}.kt-accordion-id1366_ad9097-1b10:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle )  > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id1366_ad9097-1b10:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle )  > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap .kt-blocks-accordion-icon-trigger:before{background:#007377;}.kt-accordion-id1366_ad9097-1b10:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-icon-trigger{background:#007377;}.kt-accordion-id1366_ad9097-1b10:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id1366_ad9097-1b10:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-icon-trigger:before{background:#cce8ea;}.kt-accordion-id1366_ad9097-1b10 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header:hover, \n\t\t\t\tbody:not(.hide-focus-outline) .kt-accordion-id1366_ad9097-1b10 .kt-blocks-accordion-header:focus-visible{color:#007377;background:#e6e6e4;border-top:1px solid #66bac0;border-right:1px solid #66bac0;border-bottom:1px solid #66bac0;border-left:1px solid #66bac0;}.kt-accordion-id1366_ad9097-1b10:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle ) .kt-accordion-header-wrap .kt-blocks-accordion-header:hover .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id1366_ad9097-1b10:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle ) .kt-accordion-header-wrap .kt-blocks-accordion-header:hover .kt-blocks-accordion-icon-trigger:before, body:not(.hide-focus-outline) .kt-accordion-id1366_ad9097-1b10:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle ) .kt-blocks-accordion--visible .kt-blocks-accordion-icon-trigger:after, body:not(.hide-focus-outline) .kt-accordion-id1366_ad9097-1b10:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle ) .kt-blocks-accordion-header:focus-visible .kt-blocks-accordion-icon-trigger:before{background:#007377;}.kt-accordion-id1366_ad9097-1b10:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:hover .kt-blocks-accordion-icon-trigger, body:not(.hide-focus-outline) .kt-accordion-id1366_ad9097-1b10:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible .kt-blocks-accordion-icon-trigger{background:#007377;}.kt-accordion-id1366_ad9097-1b10:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:hover .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id1366_ad9097-1b10:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:hover .kt-blocks-accordion-icon-trigger:before, body:not(.hide-focus-outline) .kt-accordion-id1366_ad9097-1b10:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible .kt-blocks-accordion-icon-trigger:after, body:not(.hide-focus-outline) .kt-accordion-id1366_ad9097-1b10:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible .kt-blocks-accordion-icon-trigger:before{background:#e6e6e4;}.kt-accordion-id1366_ad9097-1b10 .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible,\n\t\t\t\t.kt-accordion-id1366_ad9097-1b10 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header.kt-accordion-panel-active{color:#f79b2e;background:#444444;border-top:1px solid #f79b2e;border-right:1px solid #f79b2e;border-bottom:1px solid #f79b2e;border-left:1px solid #f79b2e;}.kt-accordion-id1366_ad9097-1b10:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle )  > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header.kt-accordion-panel-active .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id1366_ad9097-1b10:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle )  > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header.kt-accordion-panel-active .kt-blocks-accordion-icon-trigger:before{background:#f79b2e;}.kt-accordion-id1366_ad9097-1b10:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-header.kt-accordion-panel-active .kt-blocks-accordion-icon-trigger{background:#f79b2e;}.kt-accordion-id1366_ad9097-1b10:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-header.kt-accordion-panel-active .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id1366_ad9097-1b10:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-header.kt-accordion-panel-active .kt-blocks-accordion-icon-trigger:before{background:#444444;}@media all and (max-width: 1024px){.kt-accordion-id1366_ad9097-1b10 .kt-accordion-panel-inner{border-top:1px solid #f79b2e;border-right:1px solid #f79b2e;border-bottom:1px solid #f79b2e;border-left:1px solid #f79b2e;}}@media all and (max-width: 1024px){.kt-accordion-id1366_ad9097-1b10 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header{border-top:1px solid #cdcdc9;border-right:1px solid #cdcdc9;border-bottom:1px solid #cdcdc9;border-left:1px solid #cdcdc9;}}@media all and (max-width: 1024px){.kt-accordion-id1366_ad9097-1b10 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header:hover, \n\t\t\t\tbody:not(.hide-focus-outline) .kt-accordion-id1366_ad9097-1b10 .kt-blocks-accordion-header:focus-visible{border-top:1px solid #66bac0;border-right:1px solid #66bac0;border-bottom:1px solid #66bac0;border-left:1px solid #66bac0;}}@media all and (max-width: 1024px){.kt-accordion-id1366_ad9097-1b10 .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible,\n\t\t\t\t.kt-accordion-id1366_ad9097-1b10 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header.kt-accordion-panel-active{border-top:1px solid #f79b2e;border-right:1px solid #f79b2e;border-bottom:1px solid #f79b2e;border-left:1px solid #f79b2e;}}@media all and (max-width: 767px){.kt-accordion-id1366_ad9097-1b10 .kt-accordion-inner-wrap{display:block;}.kt-accordion-id1366_ad9097-1b10 .kt-accordion-inner-wrap .kt-accordion-pane:not(:first-child){margin-top:8px;}.kt-accordion-id1366_ad9097-1b10 .kt-accordion-panel-inner{border-top:1px solid #f79b2e;border-right:1px solid #f79b2e;border-bottom:1px solid #f79b2e;border-left:1px solid #f79b2e;}.kt-accordion-id1366_ad9097-1b10 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header{border-top:1px solid #cdcdc9;border-right:1px solid #cdcdc9;border-bottom:1px solid #cdcdc9;border-left:1px solid #cdcdc9;}.kt-accordion-id1366_ad9097-1b10 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header:hover, \n\t\t\t\tbody:not(.hide-focus-outline) .kt-accordion-id1366_ad9097-1b10 .kt-blocks-accordion-header:focus-visible{border-top:1px solid #66bac0;border-right:1px solid #66bac0;border-bottom:1px solid #66bac0;border-left:1px solid #66bac0;}.kt-accordion-id1366_ad9097-1b10 .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible,\n\t\t\t\t.kt-accordion-id1366_ad9097-1b10 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header.kt-accordion-panel-active{border-top:1px solid #f79b2e;border-right:1px solid #f79b2e;border-bottom:1px solid #f79b2e;border-left:1px solid #f79b2e;}}<\/style>\n<div class=\"wp-block-kadence-accordion alignnone\">\n<div class=\"kt-accordion-wrap kt-accordion-id1366_ad9097-1b10 kt-accordion-has-3-panes kt-active-pane-1 kt-accordion-block kt-pane-header-alignment-left kt-accodion-icon-style-xclose kt-accodion-icon-side-right\" style=\"max-width:none\">\n<div class=\"kt-accordion-inner-wrap\" data-allow-multiple-open=\"false\" data-start-open=\"1\">\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-2 kt-pane1366_3e5010-3412\">\n<div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\" type=\"button\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\"><strong>Post-2023 Model Specs<\/strong><\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div>\n<div class=\"kt-accordion-panel kt-accordion-panel-hidden\">\n<div class=\"kt-accordion-panel-inner\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:75%\">\n<ul class=\"wp-block-list\">\n<li>Response time: 95% of full-scale reading in 120 seconds<\/li>\n<li>Warm-up time: 90 seconds<\/li>\n<li>Pressure effect: 0.19% of reading\/mm of Hg from standard pressure<\/li>\n<li>Input potential: 5 V (\u00b10.25V)<\/li>\n<li>Gas sampling mode: diffusion<\/li>\n<li>Normal operating temperature range: 25\u00b0C (\u00b15\u00b0C)<\/li>\n<li>Operating humidity range: 5\u201395% (non-condensing)<\/li>\n<li>Storage temperature range: \u201340 to 65\u00b0C<\/li>\n<li>Measurement Range:<\/li>\n<li>\u26ac Low range: 0 to 10,000 ppm CO\u2082<\/li>\n<li>\u26ac High range: 0 to 100,000 ppm CO\u2082<\/li>\n<li>Typical Accuracy (at standard pressure, 1 atm):<br \/>\u26ac Low range: 0 to 1,000 ppm: \u00b1100 ppm<br \/>\u26ac Low range: 1,000 to 10,000 ppm: \u00b110% of reading<br \/>\u26ac High range: 0 to 100,000 ppm: \u00b120% of reading<\/li>\n<li>Resolution:<br \/>\u26ac 0 to 10,000 ppm CO\u2082: 3ppm<br \/>\u26ac 0 to 100,000 ppm CO\u2082: 30ppm<\/li>\n<\/ul>\n<\/div>\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:25%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/www.vernier.com\/wp-content\/uploads\/2023\/07\/product.revised.co2-bta._hero._001.jpg\" alt=\"\"\/><figcaption class=\"wp-element-caption\">Post-2023<\/figcaption><\/figure>\n<\/div>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-3 kt-pane1366_d0934b-62\">\n<div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\" type=\"button\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\"><strong>2007 \u2013 2023 Model Specs<\/strong><\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div>\n<div class=\"kt-accordion-panel kt-accordion-panel-hidden\">\n<div class=\"kt-accordion-panel-inner\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:75%\">\n<ul class=\"wp-block-list\">\n<li>Measurement ranges<br \/>\u26ac 0-10,000 ppm<br \/>\u26ac 0-100,000 ppm CO\u2082<\/li>\n<li>Accuracy<br \/>\u26ac \u00b1100 ppm or \u00b110% of reading (low range)<br \/>\u26ac \u00b1200 ppm or \u00b120% of reading (high range)<\/li>\n<li>Response time: 95% of full scale reading in 120 seconds<\/li>\n<li>Warm up time: 90 seconds<\/li>\n<li>Pressure effect: 0.19% of reading\/mm Hg from standard pressure<\/li>\n<li>Output signal range: 0-4.0 V<\/li>\n<li>Input potential: 5 V (\u00b10.25 V)<\/li>\n<li>Gas sampling mode: diffusion<\/li>\n<li>Normal operating temperature range: 25 \u00baC (\u00b15 \u00baC)<\/li>\n<li>Operating humidity range: 5\u201395% (non-condensing)<\/li>\n<li>Storage temperature: \u221240 to 65 \u00baC<\/li>\n<li>Resolution:<br \/>\u26ac 0 to 10,000 ppm CO\u2082: 3ppm<br \/>\u26ac 0 to 100,000 ppm CO\u2082: 30ppm<\/li>\n<\/ul>\n<\/div>\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:25%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2019\/11\/product.co2-bta._hero.001-scaled.jpg\" alt=\"\" style=\"width:130px;height:auto\"\/><figcaption class=\"wp-element-caption\">2007 to 2023<\/figcaption><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-1 kt-pane1366_447a21-8a11\">\n<div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\" type=\"button\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\"><strong>Pre-2007 Model Specs<\/strong><\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div>\n<div class=\"kt-accordion-panel kt-accordion-panel-hidden\">\n<div class=\"kt-accordion-panel-inner\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:75%\">\n<ul class=\"wp-block-list\">\n<li>Measurement range: 0-5000 ppm CO\u2082<\/li>\n<li>Accuracy (at standard pressure, 1 atm)<br \/>\u26ac \u00b1100 ppm in the range of 0\u20131000 ppm<br \/>\u26ac \u00b110% of reading in the range of 1000\u20135000 ppm<\/li>\n<li>Typical resolution: 20 ppm<\/li>\n<li>Response time: 95% of full-scale reading in 120 seconds<\/li>\n<li>Warm-up time (connected to powered interface): 90 seconds<\/li>\n<li>Output signal range: 0\u20132.5 V<\/li>\n<li>Output impedance: 1 k\u03a9<\/li>\n<li>Input potential: 5 V (\u00b10.25 V)<\/li>\n<li>Gas sampling mode: diffusion<\/li>\n<li>Normal operating temperature range: 25 \u00baC (\u00b15 \u00baC)<\/li>\n<li>Storage temperature range: \u221240 to 65 \u00baC<\/li>\n<\/ul>\n<\/div>\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:25%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/www.vernier.com\/til\/wp-content\/uploads\/sites\/2\/2014\/11\/image-5.png\" alt=\"\"\/><figcaption class=\"wp-element-caption\">Pre-2007<\/figcaption><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\">Calibration<\/h3>\n<p class=\"wp-block-paragraph\">Calibration is usually not necessary, but if needed, it is best to calibrate outdoors in fresh air. <\/p>\n<p class=\"wp-block-paragraph\">To calibrate, use a paper clip to press and release the &#8220;Cal&#8221; button on the sensor. The red LED should begin to flash. If you hold it so long that it is a solid red, you have reset the factory calibration. If this happens, simply press and release again. You may have to repeat this two or three times for the CO\u2082 value to adjust to around 400 ppm. Remember that the accuracy is \u00b1100 ppm at this range, so it may not read exactly 400 ppm. While calibration is best performed in outside air, which is around 400 ppm in unpolluted air, it can be done in inside air for a quick test of the sensor.\u00a0 <strong>Note:<\/strong> If the button feels like it&#8217;s not depressing and the red light does not flash, the button may be stuck under the edge of the plastic. Use the paper clip to free the button and try calibrating again.<\/p>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\">Related Products<\/h3>\n<ul class=\"wp-block-list\">\n<li><a href=\"\/product\/250-ml-nalgene-bottle-w-lid\/\">250 mL Nalgene Bottle w\/Lid<\/a> (<nobr>CO2-BTL<\/nobr>)<\/li>\n<li><a href=\"\/product\/biochamber-250\/\">BioChamber 250<\/a> (<nobr>BC-250<\/nobr>)<\/li>\n<li><a href=\"\/product\/biochamber-2000\/\">BioChamber 2000<\/a> (<nobr>BC-2000<\/nobr>)<\/li>\n<li><a href=\"\/product\/grommets-for-co2-gas-sensor\/\">Grommets for CO<sub>2<\/sub> Gas Sensor<\/a> (<nobr>CO2-GROM<\/nobr>)<\/li>\n<li><a href=\"\/product\/go-direct-co2-gas-sensor\/\">Go Direct<sup>&reg;<\/sup> CO<sub>2<\/sub> Gas Sensor<\/a> (<nobr>GDX-CO2<\/nobr>)<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Specifications and User Guide There have been three versions of wired CO\u2082 Gas Sensors. One model was sold up to about January 2007, then replaced&#8230;<\/p>\n","protected":false},"author":31,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[],"tags":[1691,860,1182,188,1690,720],"class_list":["post-1366","post","type-post","status-publish","format-standard","hentry","tag-carbon-dioxide","tag-co2","tag-co2-bta","tag-co2-din","tag-co2main","tag-maintil"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/1366","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/users\/31"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/comments?post=1366"}],"version-history":[{"count":0,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/1366\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/media?parent=1366"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/categories?post=1366"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/tags?post=1366"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}