MQ-4 Methane Natural Gas Sensor Module

MQ-4 Methane Natural Gas Sensor Module

MQ-4 Methane Natural Gas Sensor Module


In stock


MQ-4 Methane Natural Gas Sensor Module.
Note: Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE

Availability: 6 in stock SKU: STC-00197 Categories: , Tags: ,
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The gas sensing material used in the MQ-4 gas sensor is tin dioxide (SnO2) with low conductivity in clean air.  When there is a flammable gas in the environment where the sensor is located, the conductivity of the sensor increases as the concentration of flammable gas in the air increases.

A simple circuit can be used to convert the change in conductivity into an output signal corresponding to the gas concentration.

The MQ-4 gas sensor has high sensitivity to butane, propane and methane, and has a good balance between methane and propane.

This sensor detects a wide range of flammable gases, especially natural gas, and is a low cost sensor for a variety of applications.  It is suitable for monitoring equipment for liquefied gases, natural gas and gas in the home or industry. Excellent resistance to ethanol and smoke.

  • It adopts high quality double panel design with power indication and TTL signal output indication;
  • It has DO switch signal (TTL) output and AO analog signal output;
  • The TTL output valid signal is low. (When the output is low, the signal light is on, it can be directly connected to the MCU or relay module)
  • The voltage of the analog output, the higher the concentration, the higher the voltage.
  • It has good sensitivity to gas and natural gas detection.
  • There are four screw holes for easy positioning;
  • Product dimensions: 32 (L) * 20 (W) * 22 (H)
  • It has a long service life and reliable stability
  • Fast response recovery characteristics
Electrical Performance:
  • Detection of gas: Natural gas/Methane
  • Detection of Concentration:300-10000ppm
  • Input voltage: DC 5V
  • Power consumption (current): 150mA
  • DO output: TTL digital quantities 0 and 1 (0.1 and 5V)
  • AO output: 0.1-0.3V (relatively non-polluting), the highest concentration voltage is about 4V
  • Using the chip: AT89S52
  • Crystal: 11.0592MHZ
  • Baud rate: 9600
  • Compilation environment: Keil
Special Reminder:
After the sensor is energized, it needs to be preheated for about 20S, and the measured data is stable. The heating of the sensor is a normal phenomenon, because there is a heating wire inside, if it is hot, it is not normal.

Additional information

Weight 10 g
Dimensions 3.2 × 2 × 2.2 cm



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