CO2 - Does Calibration Drift?

[NateroniPizza]

Hello, all,

Just received my AirGraident One a couple days back and have it set up with ESPHome on Home Assistant.

I saw a CO2 sensor calibration option, and have been looking into it. It sounds like it calibrates itself every 2 weeks too the lowest CO2 value, but that there’s a way to manual calibrate if you want it outside.

My question: if I take it outside and calibrate it, then disable the automatic calibration, does the calibration drift? (i.e. would I need to re-calibrate it periodically) Or should I just let it do its thing, even though it’ll be indoors all the time?

Thank you

[MallocArray]

On this thread, Achim stated that the manufacturer reports 5-15 ppm accuracy loss per month

Model number for CO2 calibration?

I had a good meeting with SenseAir. They have some long term studies about the drift of the sensor when ABC is switched off. On average it looses only 5-15 ppm per month. So it means a longer baseline calibration eg 6 months would be totally doable.