MQ4 Methane Gas Sensor

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CreateLabz StoreSKU: 20-035

₱95 ₱195

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In stock (15 units), ready to be shipped


MQ-4 gas sensor sensitive material used in clean air conductivity is lower in tin titanium dioxide (SnO2). If the sensor is present in the environment in which the flammable gas, the sensor's conductivity increases with the concentration of flammable gases in the air increases. With a simple circuit, the change in conductivity of the gas concentration can be converted with the corresponding output signal. MQ-4 methane gas sensor for high sensitivity, propane, butane, and has good sensitivity. The sensor can detect a wide variety of flammable gases, especially natural gas, is a low-cost sensor for a wide variety of applications. Once connected with an Arduino board, it needs a little time to heat up. Through its potentiometer, the sensitivity is adjustable.


  • With the high-quality dual-panel design, with power indicator and TTL signal output instructions;
  • With a DO switch signal (TTL) output and AO analog signal output;
  • TTL output valid signal is low. (When the starting low signal light can be directly connected to microcontroller or relay module)
  • The analog output voltage, the higher the concentration, the higher the voltage.
  • Methane, natural gas has better detection sensitivity.
  • There are four screw holes for easy positioning;
  • Product dimensions: 32 (L) * 20 (W) * 22 (H)
  • With a long service life and reliable stability
  • Quick response and recovery properties


  • Input voltage: DC5V 
  • Power consumption (current) : 150 mA 
  • DO output: TTL digital 0 and 1 (0.1 and 5V)
  • AO output: 0.1-0 .3V (relatively clean)
  • Highest concentration of voltage: Approx 4 V 
  • Detection range of methane: detection range of 300 ~ 1000 PPM

Special note: The sensor is powered, needs to be warm up to around 20S, measured data will be stable, the sensor fever is a normal phenomenon because the internal heating wire when hotter is not normal.

Connection mode: 

  • VCC: Positive (5 v) 
  • GND: Connect power negative 
  • DO: TTL switch signal output
  • AO: Analog signal output

Package Included:
 1X MQ4 Methane Gas Sensor

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