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MQ-3 Alcohol Ethanol Gas Sensor Module For Arduino

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MQ-3 Alcohol Ethanol Gas Sensor Module For Arduino
13 products sold
PKR 250.00

Availability: In stock

Product code : 1561
MQ-3 Alcohol Ethanol Gas Sensor Module For Arduino
Sensitive for alcohol, ethanol
Power requirements: 5 VDC @ ~165 mA (heater on) / ~60 mA (heater off)
Current Consumption: 150mA
DO output: TTL digital 0 and 1 ( 0.1 and 5V)
AO output: 0.1- 0.3 V (relative to pollution), the maximum concentration of a voltage of about 4V
Detecting Concentration: 0.05-10mg/L Alcohol
Interface: 1 TTL compatible input (HSW), 1 TTL compatible output (ALR)
Heater consumption: less than 750mW
Operating temperature: 14 to 122 °F (-10 to 50°C)
Load resistance: 200kΩ
Sensitivity S: Rs(in air)/Rs(0.4mg/L Alcohol)≥5
Sensing Resistance Rs: 2KΩ-20KΩ(in 0.4mg/l alcohol)
Dimensions: 32 x 22 x 16 mm

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Porduct Description:

MQ-3 Alcohol Ethanol Gas Sensor Module For Arduino
This module is made using Alcohol Gas Sensor MQ3. It is a low cost semiconductor sensor which
can detect the presence of alcohol gases at concentrations from 0.05 mg/L to 10 mg/L.
The sensitive material used for this sensor is SnO2, whose conductivity is lower in clean air.
It’s conductivity increases as the concentration of alcohol gases increases. It has high sensitivity to
alcohol and has a good resistance to disturbances due to smoke, vapor and gasoline.
This module provides both digital and analog outputs. MQ3 alcohol sensor module can be easily
interfaced with Microcontrollers, Arduino Boards, Raspberry Pi etc.


  • 5V operation
  • Simple to use
  • LEDs for output and power
  • Output sensitivity adjustable
  • Analog output 0V to 5V
  • Digital output 0V or 5V
  • Low Cost
  • Fast Response
  • Stable and Long Life
  • Good Sensitivity to Alcohol Gas
  • Both Digital and Analog Outputs
  • On-board LED Indicator

Technical Data:

  • Concentration : 0.05 mg/L ~ 10 mg/L Alcohol
  • Operating Voltage : 5V ±0.1
  • Current Consumption : 150mA
  • Operation Temperature : -10°C ~ 70°C

Pin Out:

  • VCC – Input Power Supply
  • GND – Supply Ground
  • DO – Digital Output
  • AO – Analog Output


  • Vehicle Alcohol Detector
  • Portable Alcohol Detector

Package Includes :

1PC MQ-3 Alcohol Ethanol Gas Sensor Module

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