DC 5V MQ137 NH3 Ammonia Gas Sensor Module Ammonia Detector Range 5-500ppm
16,12 €
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.
Jetzt bei Ebay:
