Semiconductor smoke sensor

Semiconductor Sensors for Combustible Gas Good sensitivity to Combustible gas in wide range

Semiconductor Sensors for Combustible Gas

 

Sensitive material of MQ-2 gas sensor is SnO2, which with lower conductivity in clean air. When the target combustible gas exist, The sensor’s conductivity is more higher along with the gas concentration rising. Please use simple electrocircuit, Convert change of conductivity to correspond output signal of gas concentration.

MQ-2 gas sensor has high sensitity to LPG, Propane and Hydrogen, also could be used to Methane and other combustible steam, it is with low cost and suitable for different application.

 Character

*Good sensitivity to Combustible gas in wide range                                                  

* High sensitivity to LPG, Propane and Hydrogen                                     

* Long life and low cost                                          

* Simple drive circuit

Application                        

* Domestic gas leakage detector

* Industrial Combustible gas detector

* Portable gas detector

Model No.			MQ-2
Sensor Type			Semiconductor
Standard Encapsulation			Bakelite (Black Bakelite)
Detection Gas			Combustible gas and smoke
Concentration			300-10000ppm( Combustible gas)
Circuit	Loop Voltage	Vc	≤24V  DC
	Heater Voltage	VH	5.0V±0.2V ACorDC
	Load Resistance	RL	Adjustable
Character	Heater Resistance	RH	31Ω±3Ω(Room Tem.)
	Heater consumption	PH	≤900mW
	Sensing Resistance	Rs	2KΩ-20KΩ(in 2000ppm C3H8 )
	Sensitivity	S	Rs(in air)/Rs(1000ppm  isobutane)≥5
	Slope	α	≤0.6(R5000ppm/R3000ppm CH4)
Condition	Tem.  Humidity		20°C±2°C 65%±5%RH
	Standard test circuit		Vc5.0V±0.1V   VH5.0V±0.1V
	Preheat time		Over 48 hours

Semiconductor smoke sensor