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Exhaust gas analyzer
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<p>An exhaust gas analyser or exhaust carbon monoxide (CO) analyser is an instrument for the measurement of <a href="/facts/Carbon_monoxide/CKuLtEMJ">carbon monoxide</a> among other gases in the exhaust, caused by an incorrect combustion, the Lambda coefficient measurement is the most common. </p><p>The principles used for CO sensors (and other types of gas) are infrared gas sensors and chemical gas sensors. <i>Carbon monoxide sensors are</i> used to assess the CO amount during an <a href="/facts/MOT_test/GvPWhwCT">Ministry of Transport test</a>. In order to be used for such test it must be approved as suitable for use in the scheme. In the UK, a list of acceptable exhaust gas analysers for use within the MOT test is available via the <a href="/facts/Driver_and_Vehicle_Standards_Agency/Pj1f0lhx">Driver and Vehicle Standards Agency</a> website. </p>