MQ137, MQ137 Ammonia Gas Sensor, MQ137 Pinout, MQ137 Datasheet, MQ137 Working, MQ137 Features, MQ137 Specifications, MQ137 Applications Hi readers! Welcome to the next article on the MQ series gas sensors. Today, our motto is to learn about the basic information of the MQ137 ammonia gas sensor. We know that ammonia gas is extensively used in industries, agricultural lands, Environmental Monitoring, Health and Public Safety, etc. In ...