MQ137 Ammonia detection sensor NH3 Gas Sensor Module


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Size: 32mm x 22mm x 30mm


Main chip: LM393, NH3 gas-sensing probe


Working voltage: DC 5V



               1, with the signal output LED indication;

               2-way signal output (analog output, and TTL-level output);

               3, TTL output valid signal is low; (low output signal light, which can be accessed microcontroller IO port)

               4, analog output increases with the concentration, the higher the voltage the higher the concentration;

               5, ammonia has a high sensitivity and selectivity;

               6, with a long life and reliable stability;

               7, Fast response characteristics;

               8, with mounting holes for easy permanent installation;

               9, the probe can plug design for easy testing.



     For the family, the environment of hazardous gas detection device, suitable for the detection of ammonia vapor, ammonia gas sensors tested concentration range: 10 to 300ppm


Provide a reference routines, circuit diagrams and Other relative information.


Package Included:


MQ137 Ammonia detection sensor Module x1pcs

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  • Model: SH460488
  • Shipping Weight: 70 gram