Deviation by factor 100 upwards

ostaquet / Arduino-MQ131-driver

Arduino driver for gas sensor MQ131 (Ozone / O3)

MIT License

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Deviation by factor 100 upwards #2

Closed Kinick4 closed 5 years ago

Kinick4 commented 5 years ago

Hi! I have been testing your driver with my MQ131 and arduino uno. I got a deviation by a factor of 100 upwards to a validate measuring. Does anybody has a clue for me where it comes from? Greetz Niklas

ostaquet commented 5 years ago

Hi, What do you mean with deviation? Remember that there is at least 3 known version of the MQ131:

Low concentration (black bakelite) commonly used for air pollution control.
High concentration (metal) for industrial purpose.
The "out-of-scope" one (blue bakelite), powered on 6V.

The high concentration version will never give you a valid value as the lower threshold is a concentration that we don't find in common environment. KR, Olivier