Taking a break

 We're taking a break moving shop and hope to be back soon. We will ship orders on 2018-07-25. 

The analog gas sensor - MQ3 is suitable for detecting alcohol, this sensor can be used in a Breathalyser.It has a high sensitivity to alcohol and small sensitivity to Benzine. The sensitivity can be adjusted by the potentiometer.


  • Standard assembling structure (Times-of-5mm Center distance between four 3mm mounting holes)
  • Easily recognitive interfaces of sensors ("A" for analog and "D" for digital)
  • Icons to simplely illustrate sensor function 
  • High quality connector & potentiometer
  • Immersion gold surface


  • Power supply: 5V
  • Interface type: Analog
  • High sensitivity to alcohol and small sensitivity to Benzine
  • Fast response and High sensitivity
  • Stable and long life
  • Simple drive circuit
  • Size: 36.4 x 26.6 mm

Parts List

  • Analog Gas sensor (MQ3) x1
  • Analog Cable x1
  • Acrylic Base(with nylon screws) x1
Notice: The new version of analog sensor port pin mapping has been changed as the following two features.Please check the tips for changing sensor cable pin mapping while using the I/O Expansion shield. We will continue to update. For the inconvenience caused, please understand.

Alcohol Sensor (MQ3) - Analog

  • Brand: DFRobot
  • Product Code: DFR-SEN0128
  • Reward Points: 8
  • Availability: 1
  • £9.36

  • Ex Tax: £7.80
  • Price in reward points: 100

Alcohol Sensor (Grove)

Alcohol Sensor (Grove)


Alcohol sensor is semiconductor sensor for alcohol detection. It has good sensitivity and fast ...

Qty: 3

Alcohol Sensor - MQ303A

Alcohol Sensor - MQ303A


MQ303A is a semiconductor sensor for Alcohol detection with good sensitivity and fast response.

Qty: 5