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Exactly. Recently I bought a very cheap CO2 meter. It is inaccurate, but still accurate enough for 99% of the people.

Referring to acetone detectors with lousy linear lookup feature as “eCO2 sensor” is infuriating but do I must admit it’s an okay reminder for room occupants to open windows…

Which CO2 meter did you get, how accurate is it and how much did it cost? Agreed people just need a meter good enough to tell them when air quality isn’t good.

The brand is Simr, but I think there are only 3 or 4 meters that are sold as whitelabel and rebranded a thousand times. I think it was around $30.

Outside it measures around 400ppm so the base point is good. Inside it measures 480ppm with good ventilation. When someone farts it goes to 2000ppm for a while. So I think it measures 'alright'.

I'd pay $30 for a fart detector. CO2 accuracy would just be a bonus

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