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Are the sensors pre-calibrated? I found that you can easily get cheap air quality sensors from China, the problem is that they could do better with calibration,

Are the sensors pre-calibrated? I found that you can easily get cheap air quality sensors from China, the problem is that they could do better with calibration, which may require expensive (in relation to the sensor itself) equipment.

whiskers 7y ago
We have a calibration guide coming, of course it can't compare to high end equipment but it's plenty good enough for most people's uses!
F_r_k 7y ago
You can easily calibrate co2 , 02 and n2 sensors by going outside in a "wild/nature" place
- polskibus 7y ago
  Depends on the sensor, also full auto mode usually means (for example MH-Z19) that it recalibrates every X hours, which means you'd have to go to the woods fairly often ;)
  - gsich 7y ago
    can be disabled. But then I'd recalibrate them after a few months. (I do it after 6 months usually)
    - polskibus 7y ago
      Which sensors do you use? Are you happy with them overall?
      - gsich 7y ago
        MH-Z14 and MH-Z19. Yes, for the price absolutely.
        polskibus 7y ago
        Are you using hass.io? Its plugin for MH-Z does not support switching auto calibration off, and in not sure how to do it.
        gsich 7y ago
        No.