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I use a raspberry pi with both a SCD30 and MZ-14A, logging to influxdb and visualised with Grafana. The SCD30 generally seems to report higher CO2 levels than

I use a raspberry pi with both a SCD30 and MZ-14A, logging to influxdb and visualised with Grafana. The SCD30 generally seems to report higher CO2 levels than the MZ-14A. I believe it is probably more accurate because of it's calibration technique. Both are NDIR based sensors. * https://sensirion.com/products/catalog/SCD30/ https://sensirion.com/products/catalog/SCD30/ * https://www.winsen-sensor.com/d/files/MH-Z14A.pdf https://www.winsen-sensor.com/d/files/MH-Z14A.pdf

fuzzy2 4y ago
Wanted to do that, too, but had problems with the SCD30’s I2C peculiarities. And now the RP Zero is somewhat broken, bummer. Next I’ll try with a Arduino ESP32 thing. The sensor was expensive, it has to work. :-D
- DeRock 4y ago
  Just use ESPHome: https://esphome.io/components/sensor/scd30.html https://esphome.io/components/sensor/scd30.html
  - fuzzy2 4y ago
    Yeah, saw it in another thread. Wasn’t aware, will definitely give it a look!
ahaucnx 4y ago
We use the MZ, SCD as well as Senseair S8 and in my opinion all of them give a good enough accuracy. The build quality of the S8 and SCD is a lot better though. The most important thing is to stay away from eCO2 (estimated CO2) that some TVOC sensors offer which is very inaccurate.