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MQ-4 Methane Gas Sensor/ Nature Gas Detection Gas Sensor

  • • Target Gas: Methane/CH4/ LNG
  • • Detection range: 300～10000ppm
  • • Application:Domestic gas leakage alarm, Nature Gas Detection Gas Sensor/ Semiconductor Gas Sensor

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  • Principle Introduction
Principle Introduction:
Winsen Electronics, manufacture original and new methane gas sensor, nature gas sensor, LNG gas detection sensor with long lifespan and low price.
Sensitive material of MQ-4 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-4 gas sensor has high sensitivity to methane, also has anti-interference to alcohol and other gases.
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-4
Sensor Type Semiconductor
Standard Encapsulation Bakelite, Metal cap
Target Gas Methane
Detection range 300～10000ppm(CH4)
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 5000ppmCH4)≥5
Output Voltage Vs 2.5V～4.0V (in 5000ppm CH4)
Concentration Slope α ≤0.6(R5000ppm/R1000ppm CH4)
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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