MQ-3 Alcohol Gas Sensor Module
PACKAGE INCLUDES
- 1 × MQ-3 Alcohol Detector Gas Sensor Module
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Description
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
| Parameter | Value |
| Operating Voltage | 5V |
| Current Consumption | ~150mA |
| Operating Temperature | -10°C to +70°C |
| Detectable Concentration | 0.05 mg/L ~ 10 mg/L Alcohol |
| Load Resistance | 200 kΩ |
| Module Dimensions | 36 × 20 × 16 mm |
| Module Weight | 5 g |
| Shipping Weight | 0.01 kg |
| Shipping Size | 5 × 5 × 4 cm |
APPLICATIONS
- Breathalyzers
- Automotive safety systems
- Alcohol leak detection
- Home/office alcohol monitoring
- Smart home projects
- Robotics & IoT systems
- Environmental monitoring instruments
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