Principle Introduction:
Winsen Electronics, manufacture original and new LPG gas sensor, CH4 Sensor, and C3H8 Gas Sensor with long lifespan and low price for domestic gas leakage alarm.
Sensitive material of MQ-5 gas sensor is SnO2, which with lower conductivity in clean air. When the target flammable gas exist, the sensor’s conductivity gets higher along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit.
MQ-5 gas sensor has high sensitivity to butane, propane, methane and can detect methane and propane at the same time. It also can detect kinds of flammable gases, especially LPG(propane).It is a kind of low–cost sensor for many applications.

Applications :
It is widely used in domestic gas leakage alarm, industrial flammable gas alarm and portable gas detector.

Technical parameters :

Tips:For more parameter information, please refer to the latest manual provided by salesman.

Model			MQ-5
Sensor Type			Semiconductor
Standard Encapsulation			Bakelite, Metal Cap
Target Gas			LPG,CH4
Detection range			300～10000ppm（CH4,C3H8）
Standard Circuit Conditions	Loop Voltage	Vc	≤24V DC
	Heater Voltage	VH	5.0V±0.1V AC or DC
	Load Resistance	RL	Adjustable
Sensor character under standard test conditions	Heater Resistance	RH	26Ω±3Ω(room tem.)
	Heater consumption	PH	≤950mW
	Sensitivity	S	Rs(in air)/Rs( in 2000ppm C3H8)≥5
	Output Voltage	Vs	2.5V～4.0V (in 2000ppm C3H8)
	Concentration Slope	α	≤0.6(R3000ppm/R1000ppm C3H8)
Standard test conditions	Tem. Humidity		20℃±2℃；55%±5%RH
	Standard test circuit		Vc:5.0V±0.1V； VH:5.0V±0.1V
	Preheat time		Over 48 hours

Reference Circuit :

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