Product Description:

MQ137 Ammonia Detection Sensor Module NH3 Harmful Gas Detection

Features:

Module with level signal output, with alarm signal indicator;

Sensor module with analog signal output, voltage range: 0-5V;

Level signal output low level effective, can drive PNP transistor, can also be connected to MCU IO port

Analog output voltage increases with the increase of concentration, the higher the concentration, the higher the voltage;

High sensitivity to ammonia, trimethylamine, ethanolamine gas;

Long service life and reliable stability;

Module with temperature compensation function, more reliable adaptability.

Fast response recovery after preheating;

With mounting hole, easy to fix installation;

The probe can be inserted and removed, easy to test;

Gas sensitive material used in the MQ137 gas sensor is tin dioxide (SnO2), which has a low conductivity in clean air. When there is ammonia in the environment of the sensor, the conductivity of the sensor increases with the increase of the concentration of ammonia in the air. A simple circuit can be used to convert the change in conductivity into an output signal corresponding to the concentration of that gas. The MQ137 gas sensor has a high sensitivity to ammonia and is ideal for monitoring other organic amines (such as trimethylamine, ethanolamine, etc.). This sensor can detect a wide range of ammonia containing gases, making it a low-cost sensor suitable for a variety of applications.

Main application

It is widely used in household ammonia alarm, industrial ammonia leak alarm and portable ammonia detector

Specifications: