sigmasternchen/MH-Z-CO2-Sensors
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2018-04-22 21:19:35 +02:00
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README.md

MH-Z19B CO2 Module

Arduino implementation for the MH-Z19B sensor (as I didn't find all info in one place). The sensor is available for ~20 bucks at the usual places.

Resources:

Datasheet: http://www.winsen-sensor.com/d/files/infrared-gas-sensor/mh-z19b-co2-ver1_0.pdf

More info about the sensor: https://revspace.nl/MHZ19

Implementation

C ppm = 5000 * (T_high - 2 ms) / (T_high + T_low - 4ms)

The implementation is mostly based on https://forum.arduino.cc/index.php?topic=525459.msg3587557#msg3587557

Further reading:

(russuian, but google translate does a good job)