MQ4 Natural Gas, Methane Gas sensor module

This is very simple to use, suitable for sensing natural gas (composed of mostly Methane [CH4]) concentrations in the air. The MQ-4 can detect natural gas concentrations anywhere from 200 to 10000ppm.

This sensor has a high sensitivity and fast response time. The sensor’s output is an analog resistance. The drive circuit is very simple; all you need to do is power the heater coil with 5V, add a load resistance, and connect the output to an ADC.

• Characteristics of gas: 5000 PPMM methane
• Sensitivity: R in air/Rin typical gas >=5
• Sensitive resistance: 1k ohm to 20k ohm in 5000 PPM methane
• Response time: <=10s
• Recovery time: <=30s
• Heat resistance: 31ohm +/- 3ohm
• The heating current: <=180mA
• The heating voltage: 5.0V +/- 0.2V
• Heating power: <=900mW
• Measure the voltage: <=24V
• Working conditions:
  • Ambient temperature: -20℃ ~ + 55℃
  • Humidity: <=95%RH
• Storage conditions:
  • Temperature: -20℃~ +70℃
  • Humidity: <=70%RH