GM-302B MEMS Alcohol Gas Sensor

For consumer electronics products alcohol detector and drink supervision

Applications :

*consumer electronics products alcohol detector
*drink supervision to motorists and other risk operators

Product Advantages:

*MEMS technology, Strong construction
*Good shock resistance
*Small sizes and low power consumption
*Fast response and resume
*Simple drive circuit, Long lifespan

Product Description:

MEMS alcohol gas sensor is using MEMS micro-fabrication hot plate on a Si substrate base, gas-sensitive materials used in the clean air with low conductivity metal oxide semiconductor material. When the sensor exposed to gas atmosphere, the conductivity is changing as the detected gas concentration in the air. The higher the concentration of the gas, the higher the conductivity. Use simple circuit can convert the change of conductivity of the gas concentration corresponding to the output signal.

Technical Parameters:

Part No.			GM-302B
Sensor Type			MEMS
Standard Encapsulation			Ceramic
Detection Gas			Ethanol vapor
Detection Range			1~500ppm
Standard Circuit Conditions	Loop Voltage	Vc	≤24V DC
	Heater Voltage	VH	2.5V±0.1V AC or DC
	Load Resistance	RL	Adjustable
Sensor character under standard test conditions	Heater Resistance	RH	80Ω±20Ω（room temperature）
	Heater consumption	PH	≤50mW
	sensitive materials resistance	RS	1KΩ～30KΩ(in 50ppm Ethanol)
	Sensitivity	S	R0(in air)/Rs(in 5000ppm Ethanol)≥3.0
	Concentration Slope	α	≤0.9(R100ppm/R30ppm Ethanol)
Standard test conditions	Temp. Humidity		20℃±2℃；55%±5%RH
Standard test conditions	Standard test circuit		VH:2.5V±0.1V；VC :5.0V±0.1V