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MQ-3 Alcohol Gas Sensor Module

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This alcohol sensor is suitable for detecting alcohol concentration on your breath, just like your common breathalyzer. It has a high sensitivity and fast response time. Sensor provides an analog resistive output based on alcohol concentration. 


  • Product Name: Gas Sensor Module
  • Model: MQ-3
  • Type: Analog
  • Detecting Type: Alcohol, Ethanol
  • Rated Voltage: DC 3.3 - 5V
  • Detecting Range: 0.04 mg/L to 4 mg/L
  • Pin Quantity: 4
  • Pin Definition : AO - Analog Output, DO - Digital Output, GND - Ground, VCC - Voltage To Current Converter

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