MEMS combustible gas sensor GM-402B

MEMS combustible gas sensor is composed of Si-based micro-hot plate made of MEMS technology and metal oxide semiconductor material with low conductivity in clean air. When the detected gas is present in the ambient air, the conductivity of the sensor changes. The higher the concentration of this gas, the higher the conductivity of the sensor. The change in conductivity can be converted into an output signal corresponding to the gas concentration using a simple circuit.


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Sensor Features
This product adopts MEMS technology, with solid structure and high sensitivity to combustible gas; it has the characteristics of small size, low power consumption, high sensitivity, fast response and recovery, simple driving circuit, good stability and long life.


main application
It is suitable for detecting gas leakage in consumer electronic products such as mobile phones and computers; it is also suitable for combustible gas leakage monitoring devices, gas leak detectors, and fire/safety detection systems for household and commercial use.


Technical indicators

Product number


product type

MEMS combustible gas sensor

standard package

Ceramic package

detect gas

Methane, propane, etc.

Detection concentration


Standard Circuit Conditions

loop voltage


≤24V  DC

heating voltage


2.8V±0.1V AC or DC

Load Resistance



Gas sensor characteristics under standard test conditions

heating resistance


80Ω±20Ω (room temperature)

Heating power consumption



Sensitive body resistance


1KΩ~30KΩ(in 5000ppm CH4)



R0(in air)/Rs(5000ppm CH4)≥2

Concentration slope



Standard Test Conditions

temperature humidity


Standard Test Circuit

Vc:5.0V±0.1V;      VH:2.8V±0.1V

Note: Product parameters are subject to change without prior notice

production workshop


patent certificate

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