Interesting video from BigClive
Fake CO2 monitor (party detector) with schematic
Fun fact, one of our customer bought five different models of these cheap CO2 sensors from AliExpress and non contained an accurate NDIR CO2 sensor before he became aware of our kits.
He gave me these junk sensors and I am planning to write an article about it some time.
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This is why I went with airgradient. The more I dug into multiple-in-one air quality sensors the more I realized half of them are bullshit & I had no way of knowing what was legit. I got to a point where I realized I wouldn’t be able to trust any air quality monitors unless I either saw it go under extensive testing, or I built it myself with known good sensors. I’m eternally grateful for airgradient existing, solves my problem exactly.
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