MQ-3 Alcohol Gas Sensor

Sold By: HatchnHackSKU: V1701

Sale price₹ 94.00

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This MQ-3 Alcohol gas sensor detects the concentration of alcohol gas in the air and produces an analogue voltage reading. Breathalyzers can detect concentrations ranging from 0.04 mg/L to 4 mg/L. The sensor operates in temperatures ranging from -10 to 50°C and draws less than 150 mA at 5 V. The heater creates the necessary working conditions for sensitive components. The enveloped MQ-3 has six pins, four of which are used to fetch signals and the other two to provide a heating current. The simple analogue voltage interface of the sensor requires only one analogue input pin from your microcontroller. 


  • Very high sensitivity to Alcohol gas
  • MQ3 Sensor is  SnO2


  • Traffic Police Drunk Drive detection system
  • Portable alcohol detector.

Type Gas Sensor
No. of Pin
Input Voltage 5V DC
Input Current 150mA
Diameter 17mm
Height 8.8mm
Make Made in India
Temperatures Range -10 to 50° C
Detection Range 25~500ppm alcohol
Country of Origin China

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