MQ-3 Gas Sensor (Alcohol Ethanol)

WaveshareSKU: WAV-9530
Sale price £4.58
incl. VAT
excl. VAT
Only 4 units left

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Monitor alcohol ethanol with this MQ-3 gas sensor from Waveshare!

Comes complete with a 4-pin sensor cable.

Note: Please do not use this sensor for critical home/industrial/commercial gas sensing applications. Intended for development and learning/hobby purposes only.


  • Sensitive for alcohol ethanol
  • Output voltage boosts along with the concentration of the measured gases increases
  • Fast response and recovery
  • Adjustable sensitivity
  • Signal output indicator
  • Sensor only - no cable


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

Package Contents

  • 1x MQ-3 sensor
  • 1x 4-pin sensor cable


In the case of working with an MCU:

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

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