Semiconductor Sensor
Henan Hanwei Electronics Co., Ltd
www.hwsensor.com
MQ-4 Semiconductor Sensor for Natural Gas
Sensitive material of MQ...
Description
Henan Hanwei Electronics Co., Ltd
www.hwsensor.com
MQ-4 Semiconductor Sensor for Natural Gas
Sensitive material of MQ-4 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-4 gas sensor has high sensitity to Methane, also to Propane and Butane. The sensor could be used to detect different combustible gas, especially Methane, it is with low cost and suitable for different application.
Character
* Good sensitivity to Combustible gas in wide range * High sensitivity to Natural gas * Long life and low cost * Simple drive circuit
Configuration
Application
* Domestic gas leakage detector * Industrial Combustible gas detector * Portable gas detector
Technical Data
Basic test loop
Model No. Sensor Type Standard Encapsulation Detection Gas
Concentration
Loop Voltage Vc
Circuit
Heater Voltage Load
Resistance
VH RL
Heater Resistance
RH
Character
Heater consumption
Sensing Resistance
PH Rs
Sensitivity S
Slope
α
Tem. Humidity
Condition Standard test circuit
Preheat time
MQ-4 Semiconductor Bakelite (Black Bakelite) Natural gas/ Methane 300-10000ppm ( Natural gas / Methane)
≤24V DC 5.0V±0.2V ACorDC
Adjustable
31Ω±3Ω(Room Tem.)
≤900mW
2KΩ-20KΩ(in 5000ppm CH4 )
Rs(in air)/Rs(5000ppm CH4)≥5 ≤0.6(R5000ppm/R3000ppm CH4) 20℃±...
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