MQ-137 NH3 NOx Ammonia Gas Sensor Detector Module Range 5-500ppm For Arduino
16,10 €
Concentration: 5-500ppm (ammonia). 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.
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