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MQ3 Alcohol Sensor Module
Original price was: ₹130.00.₹102.00Current price is: ₹102.00.
(-22%)The MQ3 Alcohol Sensor Module is designed to detect alcohol concentration in the air and is highly sensitive to ethanol vapors. It provides analog and digital outputs, making it suitable for breath analysis, safety monitoring, and alcohol detection systems.
Product details
The MQ3 Alcohol Sensor Module uses a semiconductor gas-sensitive material (SnO₂) that changes resistance when exposed to ethanol or alcohol vapors. As alcohol concentration increases, the sensor’s conductivity rises and generates an analog voltage signal proportional to the intensity of detected alcohol.
The module includes a comparator circuit with an adjustable potentiometer to set a detection threshold and provide a digital output alarm signal when the concentration exceeds the predefined level. LED indicators are provided for power and alert status visualization.
Due to its strong sensitivity to ethanol and lower sensitivity to smoke and other gases, it is widely used in alcohol breath analyzers, vehicle safety systems, industrial monitoring, access control systems, and smart automation platforms. It can interface easily with Arduino, ESP, STM, and Raspberry Pi.
Specifications
- Sensor TypeMQ3 Alcohol / Ethanol Gas Sensor
- Gas DetectedAlcohol vapors (primarily Ethanol)
- Operating Voltage5V DC
- Output TypeAnalog AO & Digital DO
- SensitivityVery high sensitivity to alcohol vapors
- Warm-up Time≈ 20 seconds initial, optimal after warm-up
- Sensitivity AdjustmentOnboard potentiometer
- Indicator LEDsPower LED & Digital Alarm LED
- Operating Temperature-10°C to +50°C
- ApplicationsAlcohol breath analyzer, vehicle safety systems, access control, industrial safety, smart sensing & IoT alcohol monitoring
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