MQ6 LPG Butane Gas Sensing Module


The MQ6 gas sensor belongs to the MQ gas sensor family. The gas-sensitive layer of the MQ6 sensor determines the performance of the gas sensor and its capacity it detects harmful gases (Butane, Isobutane, LPG) effectively and provides adequate warnings proactively. The usage of this sensor is a normal occurrence in industries and workplaces. MQ6 gas sensor can be used in gas leakage detecting equipment in consumer and industry applications, this sensor is suitable for detecting LPG, iso-butane, propane, and LNG. Avoid the noise of alcohol, cooking fumes, and cigarette smoke. 

The core sensing element in MQ6 sensors is SnO2 which allows for quick detection of the harmful concentration of butane/isobutane gases. The sensing threshold of the MQ6 gas sensor is around 300-10000ppm allowing for precise measurement and detection of harmful gases.


MQ6 Gas Sensor Key Features

  • The operating Voltage is +5V
  • Can be used to detect LPG or Butane gas
  • Analog output voltage: 0V to 5V
  • Digital Output Voltage: 0V or 5V (TTL Logic)
  • ESD protection
  • Overvoltage protection
  • Preheat duration 20 seconds
  • Simple drive circuit
  • Fast response
  • Stable and Long life
  • Can be used as a Digital or analog sensor
  • The Sensitivity of the Digital pin can be varied using the potentiometer

MQ6 Gas Sensor Pinout

Pin NamePin No.Description
Vcc4This pin powers the module, typically the operating voltage is +5V
GND3Used to connect the module to the system ground
Digital Out2You can also use this sensor to get digital output from this pin, by setting a threshold value using the potentiometer
Analog Out1This pin outputs 0-5V analog voltage based on the intensity of the gas 

MQ2 Specifications

  • Model No.: MQ-6
  • Sensor Type: Semiconductor
  • Standard Encapsulation: Bakelite (Black Bakelite)
  • Detectable gases: Isobutane, Butane, LPG
  • Detectable concentration: 300-10000ppm ( Butane, Propane, LPG)
  • Loop Voltage (Vc): ≤24V DC
  • Heater Voltage (VH): 5.0V±0.2V AC/DC
  • Heater Resistance (RH): 31Ω±3Ω (Room Temp.)
  • Sensitivity (S): Rs(in air)/Rs(1000ppm C4H10)≥5
  • Slope(α): ≤0.6( R2000ppm/R1000ppm LPG )
  • Storage Temp: -20℃-70℃
  • Standard Detection Temp: 20℃±2℃/Vc: 5V±0.1
  • Standard Detection Humidity: 65%±5%/Vh: 5V±0.1


  • Detect or measure Gases like LPG, and butane
  • Air quality monitor
  • Gas leak alarm
  • Safety standard maintenance
  • Maintaining environmental standards  in hospitals 


You can download the datasheet for MQ6 Butane Gas Sensing Module by clicking the link given below:

See Also: CD4059 Program Divide-by-N Counter | ADXL335 Accelerometer Sensor Module | FC-28 Soil Moisture Sensor Module