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  • Sensitive for carbon monoxide
  • Output voltage boosts along with the concentration of the measured gases increases
  • Fast response and recovery
  • Adjustable sensitivity
  • Signal output indicator


  • Power: 2.5V ~ 5.0V
  • Dimension: 40.0mm * 21.0mm
  • Mounting holes size: 2.0mm


  • Carbon monoxide monitor

How to Use

In the case of working with a MCU:

  • VCC: 2.5V ~ 5.0V
  • GND: power supply ground
  • AOUT: MCU.IO (analog output)
  • DOUT: MCU.IO (digital output)


Development resources: demo codes, schematic, datasheets, etc.

Selection Guide

Part NumberSensitive GasApplication
MQ-135 Gas Sensorbenzene, alcohol, smokeAir quality monitor
MQ-2 Gas SensorLPG, propane, hydrogenGas leakage detector
MQ-3 Gas Sensoralcohol, ethanolCar alcohol alarm, breathalyser
MQ-5 Gas SensorLPG, natural gas, coal gasGas leakage detector
MQ-7 Gas Sensorcarbon monoxideCarbon monoxide monitor

Weight: 0.01 kg

Parts List

  • MQ-7 Gas Sensor x 1
  • 4-pin custom connector jumper wire x 1

Gas Sensor (MQ7) - Carbon Monoxide

  • Brand: Waveshare
  • Product Code: WVSHARE-77
  • Reward Points: 7
  • Availability: Out Of Stock
  • £9.58

  • Ex Tax: £7.98
  • Price in reward points: 100

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