CO,CO2 Semiconductor Gas Sensor for Combustible Gas Quality Choice

Specifications

1. Domestic gas leakage detector,
2. Industrial CO detector,
3. Portable gas detector.

MQ series gas sensors                                                                 

1. Features

 

*Good sensitivity to Combustible gas in wide range                                                 

 

* High sensitivity to Natural gas                                      

 

* Long life and low cost                                          

 

* Simple drive circuit

 

Application:                        

 

* Domestic gas leakage detector

 

* Industrial Combustible gas detector

 

* Portable gas detector

 

2. Applications

 

Sensitive material of MQ-4 gas sensor is SnO_2, 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.

 

 

The sensor could be used to detect different combustible gas, especially Methane; it is with low cost and suitable for different application.

Product Parameter:                                                                       

 

Model No.			MQ-4
Sensor Type			Semiconductor
Standard Encapsulation			Bakelite (Black Bakelite)
Detection Gas			Natural gas/ Methane
Concentration			300-10000ppm
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 5000ppm CH4 )
	Sensitivity	S	Rs(in air)/Rs(5000ppm CH4)≥5
	Slope	α	≤0.6(R5000ppm/R3000ppm CH4)
Condition	Tem.  Humidity		20°C±2°C;65%±5%RH
	Standard test circuit		Vc:5.0V±0.1V;                         VH: 5.0V±0.1V
	Preheat time		Over 48 hours

 

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