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Ask an Expert Forum How do I choose a suitable CO₂ sensor replacement like in this guide?
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How do I choose a suitable CO₂ sensor replacement like in this guide?

bidrohini
bidrohini 12 days ago

Hi everyone,

I found this blog post explaining how to find and replace a CO₂ sensor in a car. I'm trying to understand how to pick a compatible CO₂ sensor from options like those listed here on element14.
What key parameters should I match when selecting a replacement CO₂ sensor for automotive or similar use? Should I focus on voltage ranges, sensor response time, or compatibility with the ECU?
Are environmental CO₂ sensors appropriate for vehicle diagnostics, or should I only consider automotive-grade sensors?
How can I tell if a sensor supports real-time feedback needed for emission control systems?
Any recommendations on robust and reliable models for harsh automotive environments?

Thanks in Advance. 

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Top Replies

  • michaelkellett
    michaelkellett 12 days ago +1
    The first thing you need to do is work out if you want to replace an O2 sensor or a CO2 sensor - two completely different things. The O2 (oxygen) sensor typically is measuring the working of the catalytic…
  • bidrohini
    bidrohini 12 days ago in reply to michaelkellett +1
    Thanks for pointing that out — you're absolutely right, O₂ and CO₂ sensors serve different roles. To clarify my question: I'm exploring the idea of using CO₂ gas sensors (like those sold on Element14…
  • dougw
    dougw 12 days ago +1
    I have done a couple of CO2 sensor projects on element14. When I did my Invisible Hazards Project , I used a SenseAir S8 to measure CO2 (because it had a good price/performance ratio and I could program…
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  • dougw
    0 dougw 12 days ago

    I have done a couple of CO2 sensor projects on element14. When I did my Invisible Hazards Project, I used a SenseAir S8 to measure CO2 (because it had a good price/performance ratio and I could program it to be sensitive to small changes in CO2 concentration). I also did an Amphenol air quality road test if you prefer a pre-programmed ready-made test rig.

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  • dougw
    0 dougw 12 days ago

    I have done a couple of CO2 sensor projects on element14. When I did my Invisible Hazards Project, I used a SenseAir S8 to measure CO2 (because it had a good price/performance ratio and I could program it to be sensitive to small changes in CO2 concentration). I also did an Amphenol air quality road test if you prefer a pre-programmed ready-made test rig.

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