[shortdesc]Application:Mostly used in the fixed or portable smoke detector or alamers for domestic and industrial application.
Feature:MEMS technology, Strong construction,High sensitivity to combustible gases,Small sizes and low power consumption
[/shortdesc]
Production Description:
MEMS smoke 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.
Feature:

MEMS technology, Strong construction
High sensitivity to combustible gases
Small sizes and low power consumption
Fast response and resume
Simple drive circuit, Long lifespan

Application:
Mostly used in the fixed or portable smoke detector or alamers for domestic and industrial application.
Technical Parameters：

Part No.			GM-202B
Sensor Type			MEMS
Standard Encapsulation			Ceramic
Detection Gas			CH4, C3H8 &etc.
Detection Range			1~5000ppm (C3H8)
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 C3H8)
	Sensitivity	S	R0(in air)/Rs(in 5000ppmCH4)≥1.5
	Concentration Slope	α	≤0.6(R100ppm/R30ppmC3H8)
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

10 pcs Winsen GM-202B MEMS Smoke Gas Sensor