MQ-3 Alcohol detector sensor Module for Ethanol and Breath Analyze

The MQ-3 Alcohol and Ethanol Gas Detector Sensor Module is a high-sensitivity electrochemical device engineered for real-time breath analysis and industrial vapor tracking. Driven by a rugged SnO2 (Tin Dioxide) semiconductor layer, this sensor boasts exceptional sensitivity to alcohol vapor and ethanol concentrations, with minimal cross-sensitivity to gasoline fumes or cooking smoke. The onboard carrier breakout board incorporates a versatile dual-signal layout: a 0-5V Analog Output (AO) for real-time concentration tracking and logging, and a TTL Digital Output (DO) driven by an onboard LM393 voltage comparator with an adjustable threshold potentiometer for immediate safety relay or buzzer triggers. Operating on a standard 5V power supply, it is the definitive hardware pick for DIY digital breathalyzers, smart ignition interlock grids, distillery safety monitoring, and student robotics projects using Arduino, ESP32, or Raspberry Pi.

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Tags MQ-3 alcohol sensor India gas sensor MQ3 mq3 gas sensor alcohol detector module breathalyzer sensor mq-3 arduino sensor ethanol detector sensor board mq 3 mq3 gas sensor

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Product Details :

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Made In :	India

The MQ-3 Alcohol Sensor Module is specifically designed to detect ethanol (alcohol) vapors in the air, making it ideal for breath analysis and alcohol detection systems. It offers high sensitivity to alcohol while minimizing interference from other gases. With both analog and digital outputs, the MQ-3 module can be easily interfaced with Arduino, ESP32, and other microcontrollers for real-time monitoring and alert systems.

Key Features

High sensitivity to alcohol (ethanol) vapors
Suitable for breath alcohol detection
Dual output: Analog (A0) and Digital (D0)
Adjustable sensitivity via onboard potentiometer
Fast response and recovery time
Onboard comparator (LM393) for digital output
LED indicators for power and detection
Easy integration with Arduino and IoT platforms

Technical Specifications

Parameter	Specification
Sensor Type	MQ-3 Gas Sensor
Detectable Gas	Alcohol (Ethanol)
Operating Voltage	5V DC
Output Type	Analog + Digital
Preheat Time	~20 seconds (recommended longer for stability)
Sensitivity	Adjustable
Interface	4-pin (VCC, GND, A0, D0)
Comparator IC	LM393