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MQ-3 Alcohol Gas Sensor

MQ3 Alcohol Gas Sensor Specifications and Features:

  • Model No.: MQ-3
  • Dimensions: 36 x 20 x 21 mm (LxWxH)
  • Weight: 6gm
  • Heater voltage: 5±0.2V (AC•DC)
  • Loop voltage: ≤24V (DC)
  • Load resistance: Adjustable
  • Heating Resistance: 31Ω±3Ω (Room temperature)
  • Heating Power: ≤ 900mW
  • Surface thermal resistance: 2Kohm-20Kohm (0.4mg/L alcohol)
  • Sensitivity: Rs (in the air)/Rs (0.4mg/L alcohol) ≥ 5
  • Working temperature: 20 degrees ±2 degree
  • Humidity: 65%±5%RH
  • Signal output light indicator.
  • Analog and level signal output.
  • TTL output valid signal is low. (When the output low signal light can be directly connected microcontroller or relay module).
  • The carbon monoxide detection with better sensitivity.
  • Has a long service life and reliable stability.
  • Rapid response recovery features.



MQ3 Alcohol Gas Sensor Module is a simple-to-use MQ-3 Alcohol Detector Gas Sensor Module which can sense the presence of Alcohol in the air. The module uses our MQ-3 sensor. It simplifies the interface to the odd pin spacing of the sensor and provides an interface through standard 4 x 0.1″ header pins. It provides an analog output corresponding to the concentration of the gas in the air and an easy-to-use digital output.

MQ3 Alcohol Gas Sensor

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