MQ-3 Gas Sensor Module for Alcohol Detection
MQ-3 Gas Sensor Module detects alcohol vapors with high sensitivity. Ideal for breath analyzers, safety systems, and Arduino-based alcohol detection projects.
| Parameter | Specification |
|---|---|
| Operating Voltage | 5V DC |
| Sensing Gas | Alcohol vapors (Ethanol, Methanol) |
| Output | Analog & Digital |
| Sensitivity Range | 0.05 mg/L – 10 mg/L Alcohol |
| Response Time | < 10s |
| PCB Size | Approx. 32mm x 22mm |
OVERVIEW
The MQ-3 Alcohol Gas Sensor Module is a reliable and high-sensitivity module designed to detect alcohol vapors in the air. It features a SnO₂ sensing layer that changes resistance with alcohol concentration, producing an analog output proportional to the gas level.
It is widely used in breath analyzer systems, vehicle safety devices, and IoT-based monitoring applications. The module is fully compatible with Arduino, ESP32, NodeMCU, and Raspberry Pi, and includes both analog and digital outputs for flexible use.
⚙️ Features
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Detects alcohol vapors like ethanol, methanol, and smoke
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High sensitivity and fast response time
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Adjustable threshold using onboard potentiometer
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Dual output: Analog and Digital
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Easy to interface with Arduino or ESP32
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Long lifespan and stable performance
📦 Applications
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Alcohol detection systems
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Breath analyzer devices
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Vehicle ignition interlock systems
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IoT-based safety monitoring projects
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