MINIMUM TECH FEATURES

• Operating Voltage: 5V
• Power Consumption: 0.75W
• Operating Temperature: -10°C to +50°C
• Detection Range: 0.04 mg/L to 4 mg/L Alcohol in air
• Response Time: ≤10 seconds

DESCRIPTION

• The MQ-3 Gas Sensor is designed for detecting alcohol vapors, with high sensitivity to ethanol.
• It outputs an analog voltage proportional to the alcohol concentration in the surrounding air.
• Many MQ-3 sensor modules also include a digital output using a comparator (e.g., LM393) with an adjustable threshold.
• Easy to interface with Arduino, ESP32, Raspberry Pi, and other microcontrollers.
• Simple pinout: VCC, GND, AO, and sometimes DO (digital output).
• Features an internal heating element to maintain optimal sensing temperature.
• Provides rapid response and recovery, enabling quick measurement updates.
• Offers stable, long-life operation suitable for continuous monitoring.
• Commonly used in breath analyzers, automation, and alcohol detection systems.

TECHNICAL SPECIFICATIONS

APPLICATIONS

• Breathalyzers
• Automotive safety systems
• Alcohol leak detection
• Home/office alcohol monitoring
• Smart home projects
• Robotics & IoT systems
• Environmental monitoring instruments