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ostaquet / Arduino-MQ131-driver

Arduino driver for gas sensor MQ131 (Ozone / O3)
MIT License
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Update MQ131.cpp #32

Closed Kesavaram closed 3 years ago

Kesavaram commented 4 years ago

To add functionality for the MQ131 low concentration Sn02 sensor.

ostaquet commented 3 years ago

Hi @Kesavaram,

I don't understand the difference between the MQ131 low concentration (Black bakelite) and the Sn02 version.

Do you have some data sheet supporting this?

KR, Olivier

Kesavaram commented 3 years ago

Hi @ostaquet

The MQ131 low concentration (Black bakelite) uses WO3 as its sensing material where its Rs/Ro value increases with an increase in Ozone concentration. However, the other low concentration sensor uses SnO2 as its sensing material where its Rs/Ro value decreases with an increase in Ozone concentration.

The datasheet for the MQ131 low concentration SnO2 sensor is given below: http://www.sensorica.ru/pdf/MQ-131.pdf

The datasheet for the MQ131 low concentration (Black bakelite) sensor is given below: https://www.winsen-sensor.com/d/files/PDF/Semiconductor%20Gas%20Sensor/mq131-(low-concentration)-ver1_3-manual.pdf

KR, Kesav

ostaquet commented 3 years ago

@Kesavaram Great! Thanks for your contribution :-)