Post #3033337
2025-05-04 17:56 UTC
Great write-up, I'd never even heard of this type of photo acoustic sensor before. Is it really spectroscopy if it's a monochromatic IR emitter though?
Replies (1)
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@Sal@mander.xyz 2025-05-04 18:51
Probably not! That was a mistake on my part. The better term would be photoacoustic sensing I believe, so I have edited the post to use that term instead. Although the response is proportional to the absorbance value at a narrow wavelength range, and CO2 is detected selectively because its molar absorption coefficient is high at that specific wavelength. I think the argument can be made that this is an action spectroscopy method limited to a single point. But I am not quite sure, so 'photoacoustic sensing' wins. Thanks!