MQ-137 NH3 NOx Ammoniakgassensor Detektor Modul Bereich 5-500 ppm für Arduino
17,86 €
The MQ137 module is a sensor board designed to detect NH3 ammonia and other gases. The sensitive material of the MQ137 gas sensor is SnO2, which has low conductivity (high resistance) in clean air. When the target sensitive gas is present, the conductivity of the sensor increases with the gas concentration.
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