When was the last time you had that sensor calibrated properly with a can of test gas and a multimeter?
Take it outside, as long as it measures 400-450 it's probably good.
Metrology calibration is necessary if you want accuracy better than 10%, but most of us don't care at all about that, instead we care about increments of 200ppm or more.
alt Hacker News
Take it outside, as long as it measures 400-450 it's probably good.
Metrology calibration is necessary if you want accuracy better than 10%, but most of us don't care at all about that, instead we care about increments of 200ppm or more.