MQ-3 Alcohol Sensor Module | Ethanol & Breath Alcohol Detection Sensor | Compatible with Arduino, Raspberry Pi & IoT Projects

Technical Specifications

• Product Type: Alcohol Gas Sensor Module
• Sensor Model: MQ-3
• Detectable Gases: Alcohol (Ethanol), Breath Alcohol
• Operating Voltage: 5V DC
• Heater Voltage: 5V
• Output Type: Analog & Digital
• Comparator IC: LM393
• Sensitivity Adjustment: Onboard potentiometer
• Response Time: Fast response & recovery
• Preheat Time: Approx. 20–30 seconds
• Interface Compatibility: Arduino, Raspberry Pi, ESP8266, ESP32, IoT platforms
• Indicators: Power LED and Digital Output LED
• Mounting: PCB mount with fixing holes

Product Description

The MQ-3 Alcohol Sensor Module is a high-sensitivity ethanol and alcohol detection sensor specially designed for breath analyzer applications, safety systems, and DIY electronics projects. It detects alcohol vapors in the air with high accuracy and fast response.

Operating on 5V DC, the MQ-3 module is fully compatible with Arduino, Raspberry Pi, ESP8266, ESP32, and other microcontroller boards. It provides both analog and digital outputs, allowing flexible use for measurement, alerts, and automation systems. The onboard LM393 comparator and adjustable potentiometer make it easy to fine-tune sensitivity as per project needs.

Ideal for DIY breathalyzer projects, vehicle safety systems, alcohol detection alarms, smart security solutions, and educational experiments, the MQ-3 Alcohol Sensor Module is a reliable choice for students, hobbyists, and developers.