MEMS CO Sensor GM-702B

The MEMS carbon monoxide gas sensor uses MEMS technology to make a micro-hot plate on a Si-based substrate, and the gas-sensing material used is a metal-oxide-semiconductor material with low conductivity in clean air. When the detected gas exists in the ambient air, the conductivity of the sensor changes. The higher the concentration of the 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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Product Size

Gallery display

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

main application
Carbon monoxide gas leak alarms for household use, carbon monoxide gas alarms for industrial use, and portable carbon monoxide gas detectors, etc.

Technical indicators

Product number			GM-702B
product type			MEMS carbon monoxide gas sensor
standard package			Ceramic package
detect gas			carbon monoxide
Detection concentration			5ppm-5000ppm(CO)
Standard Circuit Conditions	loop voltage	V_c	≤24V DC
	heating voltage	V_H	2.5V±0.1V ACorDC （high temperature） 0.5V±0.1V ACorDC （low temperature）
	Load Resistance	R_L	可调
	heating time	T_L	60s±1s（high temperature），90s±1s（low temperature）
under standard test conditions	heating resistance	R_H	80Ω±20Ω（room temperature）
	Heating power consumption	P_H	≤50mW
	Sensitive body resistance	R_s	1KΩ-30KΩ(in 150ppm CO)
	Sensitivity	S	Ro(in air)/Rs(150ppm CO)≥3
Standard Test Conditions	temperature humidity		20℃±2℃；55%RH±5%RH
Standard Test Conditions	Standard Test Circuit		Vc:5.0V±0.1V； V_H:2.5V±0.1V (high temperature) 0.5V±0.1V (low temperature)

Note: Product parameters are subject to change without prior notice

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patent certificate

You can contact us through the online message and online customer service on the right, or you can call our national service hotline: 086-0371-60932951.