
I am building a project to measure air quality among other things and this sensor works very well. C02 takes about 15-25 seconds to stabilize and provide a reading. I recommend some anti-aliasing, but it seems to work for the tests I've tried so far. wide range of sensitivity. The C02 is not calibrated and I wouldn't use it for scientific purposes, but it gives a good indication of the expected C02 level in the room and isn't too far off. You can definitely see if the levels are too high with this one.

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