The MQ3 Alcohol Gas Sensor Module is a high-sensitivity sensor designed to detect alcohol concentration in the air, commonly used in breathalyzer and safety monitoring systems. It is based on the MQ3 semiconductor sensor, which provides stable and fast detection of ethanol, benzene, and smoke vapors.
This sensor module is compatible with Arduino, ESP32, Raspberry Pi, and other microcontrollers, making it ideal for DIY electronics, IoT safety projects, and alcohol detection systems. With both analog and digital outputs, it’s easy to integrate and calibrate in various environments.
Perfect for educational, experimental, and prototype development, the MQ3 sensor offers a simple way to create alcohol detection systems for vehicle safety, smart helmets, or home automation.
⭐ Key Features:
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🧪 Detects alcohol concentration (ethanol, benzene, smoke)
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⚡ Operating voltage: 5V DC
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📊 Dual output: Analog and Digital
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🧰 Adjustable sensitivity via onboard potentiometer
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🔄 Fast response and recovery time
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📲 Compatible with Arduino, ESP32, Raspberry Pi
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🔧 Easy to interface in DIY or academic projects
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✅ Ideal for breathalyzers, smart helmets, and safety systems
⚙️ Technical Specifications:
| Parameter | Specification |
|---|---|
| Sensor Type | MQ-3 Semiconductor Gas Sensor |
| Detectable Gases | Alcohol, Ethanol, Benzene, Smoke |
| Operating Voltage | 5V DC |
| Output Signal | Analog & Digital |
| Detection Range | 0.05 – 10 mg/L Alcohol |
| Preheat Time | 20 seconds (approx.) |
| Sensitivity Adjustment | Potentiometer (onboard) |
| Dimensions | Approx. 32mm x 20mm |
| Compatibility | Arduino, ESP8266, ESP32, Raspberry Pi |
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