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Ammonia Gas Sensor - MQ-137

SKU 3843
Save 22%
Original Price £42.92 inc VAT
Current Price £33.40 inc VAT
£27.83 ex VAT
3 in stock.

The MQ-137 is an Ammonia (NH₃) gas sensor from Winsen. The sensing element is SnO2, which has lower conductivity in clean air. When NH₃ (Ammonia) gas exists, the sensor’s conductivity gets higher along with the gas concentration rising. A simple circuit makes measuring this change in conductivity and turning it into data fairly straightforward, but does require some calibration.


  • PCB is not included.