The Planted Tank Forum - View Single Post - Affordable CO2 sensor?

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post #30 of (permalink) Old 11-11-2012, 05:05 PM
Hoppy
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Does this work by shining a beam of IR light through a length of air gap, and measuring the absorption in the wave length band that CO2 absorbs? If so, it must require a flow of air through the air gap. And, if that's the case there would be a minimum volume of air around the sensor that would be needed to refresh the air in the gap so it can follow the fluctuations in CO2 content. Or, am I off on a tangent here?

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