Ammonia Gas Sensor - MQ-137 SAFECROSS runs 20 hours (CR123A)

runs 20 hours (CR123A)

370 lumens of intense bright light while drawing 450 watts @ 37

  Long tear drop shaped beam pattern

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Ammonia Gas Sensor - MQ-137 SAFECROSS runs 20 hours (CR123A)The MQ 137 is an Ammonia (NH) gas sensor from Winsen. The sensing element is SnO2, which has lower conductivity in clean air. When NH (Ammonia) gas exists, the sensors conductivity gets higher along with the gas concentration rising. A simple circuit makes measuring this change in conductivity and turning it into data fairly straight forward, but does require some calibration. For easy Solderability; use our [Gas Sensor Breakout Board](https: www.