MQ3-Alcohol Detector Gas Sensor Module

The MQ3 Alcohol Detector Gas Sensor Module is a highly sensitive sensor specifically designed for detecting alcohol vapors in the air. This module is ideal for creating breathalyzers, vehicle safety systems, and various applications requiring alcohol detection. Thanks to its ease of use and compatibility with microcontrollers, the MQ3 sensor is popular in both DIY electronics projects and professional safety systems.

Key Features:

• Alcohol Vapor Detection: Specially designed to detect alcohol vapors, making it ideal for breathalyzers and alcohol monitoring.
• Dual Output Options:
  • Analog Output: Provides a variable voltage output proportional to the alcohol concentration, allowing real-time monitoring.
  • Digital Output: Outputs a HIGH or LOW signal when the alcohol concentration exceeds a set threshold, which can be adjusted using an onboard potentiometer.
• Fast Response and High Sensitivity: Quickly detects alcohol vapors with high sensitivity, making it suitable for a range of real-time monitoring applications.
• Wide Detection Range: Can detect alcohol levels from approximately 25 ppm to 500 ppm.
• Operating Voltage: Works on 5V DC, making it compatible with common microcontrollers such as Arduino, Raspberry Pi, and other development boards.

Technical Specifications:

• Power Supply: 5V DC
• Sensitivity Range: 25 ppm to 500 ppm (alcohol)
• Preheat Time: Requires around 24 hours of preheating for the most accurate results.
• Temperature Range: Operates between -10°C and 50°C
• Output Types:
  • Analog voltage output (A0) for real-time concentration measurement
  • Digital output (D0) with adjustable threshold
• Size: Compact and mountable on PCB boards for easy integration

How It Works:

The MQ3 sensor module utilizes a tin dioxide (SnO₂) semiconductor material that reacts to alcohol vapors. When exposed to alcohol, the sensor’s resistance decreases, which causes a change in output voltage. This change can be read by a microcontroller to determine the alcohol concentration in the air.

Integration and Usage:

Connecting the MQ3 module to microcontrollers is straightforward, with both analog and digital output options to suit various application needs. It provides reliable, stable measurements, making it a practical solution for developers and DIY enthusiasts alike.

Applications:

• Breathalyzers: Widely used in personal and law enforcement breathalyzers to detect blood alcohol levels.
• Automobile Safety Systems: Used in vehicles to detect alcohol in the air inside the cabin, helping reduce the risk of drunk driving.
• Workplace Safety Systems: Monitors alcohol levels in sensitive areas of workplaces where the presence of alcohol may be hazardous.
• Industrial Monitoring: Ensures compliance with safety regulations by preventing alcohol exposure in designated areas.
• Drunk Driver detection system
• Portable alcohol detector.

Important Notes:

• Calibration: For the best accuracy, calibrate the sensor in a clean-air environment before use.
• Warm-Up Period: Allow the sensor to preheat for at least 24 hours to stabilize for precise measurements.
• Ventilation: Proper airflow around the sensor ensures more accurate readings.

The MQ3 Alcohol Detector Gas Sensor Module is a practical, reliable, and affordable solution for any project requiring alcohol detection, offering versatile applications in safety, automotive, and IoT projects.

Package Includes:

• 1Piece-MQ3-Alcohol Detector Gas Sensor Module