MEMS alcohol gas sensor GM-302B

The MEMS alcohol gas sensor uses the MEMS process 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 sensor is in a gas environment, the conductivity of the sensor changes with the concentration of the detected gas in the air. 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 good shock resistance; 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 ethanol vapor in places where consumer sub-products such as mobile phones and computers are applied and tested; it is also suitable for drinking supervision of motor vehicle drivers and other risky workers.

Technical indicators

Product number			GM-302B
product type			MEMS alcohol gas sensor
standard package			Ceramic package
detect gas			Ethanol vapor
Detection concentration			1ppm～500ppm
Standard Circuit Conditions	loop voltage	V_c	≤24V DC
	heating voltage	V_H	2.5V±0.1V AC or DC
	Load Resistance	R_L	adjustable
Gas sensor characteristics 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 50ppm Ethanol)
	Sensitivity	S	Rs(in air)/Rs(in 50ppm Ethanol)≥3.0
	Concentration slope	α	≤0.9(R_200ppm/R_{50ppm Ethanol)}
Standard Test Conditions	temperature humidity		20℃±2℃；55%RH±5%RH
	Standard Test Circuit		V_H:2.5V±0.1V； Vc:5.0V±0.1V
	Preheat time		Not less than 48 hours

Note: Product parameters are subject to change without notice

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