Gas Sensor MQ4 Sensitive Methane CNC Gases


MQ4 is a semiconductor sensor which can detect the presence of methane, compressed natural gas(CNC) at concentrations from 200 to 10,000 ppm. The sensitive material used for this sensor is SnO2, whose conductivity is lower in clean air.

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It’s conductivity increases as the concentration of methane gas increases. It has also sensitivity to propane and butane gases. MQ4 Methane CNG gas sensor can be easily interfaced with Microcontrollers, Arduino Boards, Raspberry Pi.



  • Detects: Natural gas and methane



  • High Sensitivity to Methane, Natural Gas
  • Fast Response
  • Stable and Long Life
  • Low Cost
  • Simple drive circuit
  • Analog and Digital Outputs
  • Trigger Level configuration Potentiometer
  • LM393 comparator


Technical Data

  • Detecting Concentration : 200 ~ 10,000 ppm
  • Circuit Voltage : 5V ±0.1 AC or DC
  • Heating Voltage : 5V ±0.1 AC or DC
  • Load Resistance : 20KΩ
  • Heater Resistance : 33Ω ±5%
  • Heating Consumption : < 750mW
  • Operating Temperature : -10°C ~ 50°C
  • Operating Voltage: DC 5V
  • Analog Output (AO): 0~5V analog output voltage
  • Digital Outout (DO): 0V or 5V output
  • Configuration: Through Potentiometer (adjusts the output level transition)
  • Preheat Duration: 20s
  • Weight: 5g
  • Dimensions: 23 x 19 x 19 mm