Product Code: SN-MQ3-MOD
Availability: In Stock
Ex Tax: $2.10

The MQ-3 Alcohol Gas sensor can detect or measure gasses like alcohol. It is very sensitive to alcohol and slightly sensitive to benzine. It is suitable to be use as alcohol checker and breathalyser The module version of this sensor comes with a Digital Pin which makes this sensor to operate even without a microcontroller and that comes in handy when you are only trying to detect one particular gas. When it comes to measuring the gas in ppm the analog pin has to be used, the analog pin also TTL driven and works on 5V and hence can be used with most common microcontrollers.


  • Built in Power Indicator LED and Low TTL Indicator LED
  • Operating Voltage is +5V
  • Highly sensitive to alcohol
  • Slightly sensitive to benzine
  • Analog output voltage: 0V to 5V
  • Digital Output Voltage: 0V or 5V (TTL Logic)
  • Preheat duration 20 seconds
  • Can be used as a Digital or analog sensor
  • The Sensitivity of Digital pin can be varied using the potentiometer
  • Dimension (mm): 32 (L) x 22 (W) x 18 (H)
  • Weight : 10 g


  • Alcohol checker
  • Breathalyzer (Blood Alcohol level detector from breath)

Packing List:

  • 1 x MQ3 Alcohol Sensor Module
s***4 30/05/2023
lovee itt!
f***a 30/05/2023
Very nice
j***4 30/05/2023
Good same a picture
d***t 29/05/2023
A***h 28/05/2023
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