MQ3 Alcohol Gas Sensor Module

SKU: VM00100

Sale price Rs. 101.69 (excl.18% GST)
Rs. 120.00


Used as a alcohol gas sensing element in this module. It requires no external components just plug in Vcc & ground pins and you are ready to go. For Digital output, the threshold value can be easily set by an on-board potentiometer. Using this module you can easily interface MQ3 Alcohol sensor to any Microcontroller, Arduino or even Raspberry Pi.As this Gas Sensor module has high sensitivity and fast response time to alcohol, it can be used in breathalyzer. MQ3 Sensor also has small sensitivity to Benzine.

Technical Specification:

  • Detection Gas: Alcohol Gas
  • Concentration: 0.4mg/L – 4mg/L
  • Supply Voltage: <24V
  • Heater Voltage: 5.0V ± 0.2V (High), 1.5V ± 0.1V (Low)
  • Load Resistance: Adjustable
  • Heater Resistance: 31Ω ± 3Ω
  • Heater Consumption: <900mW


  • Sensor Type - Semiconductor
  • Easy SIP header interface
  • Compatible with most of the microcontrollers
  • Low-power standby mode
  • Requires heater voltage
  • Good sensitivity to alcohol gas
  • Fast response and High sensitivity  
  • Long life and low cost
  • Requires simple Drive circuit

Pin Description:


  • Gas level over-limit alarm
  • Breathalyser
  • Portable alcohol detector
  • Stand-alone/background sensing device
  • Environmental monitoring equipment
  • Car alcohol alarm

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