The MQ-3 Alcohol Gas Sensor Module is a high-sensitivity gas detection sensor specifically designed to sense alcohol (ethanol) vapors in the surrounding environment. It uses a semiconductor sensing element (SnO₂) that changes resistance based on alcohol concentration, allowing real-time monitoring using microcontrollers like Arduino, ESP32, and Raspberry Pi. Both analog and digital outputs are provided — the analog output reflects the concentration level, and the digital output changes state when the alcohol level exceeds a set threshold using the onboard potentiometer. This makes the module ideal for use in breathalyzer projects, safety alarms, IoT alcohol detection systems, and educational electronics.
Key Features
- Detects alcohol/ethanol vapors in air (detecting range ~0.05–10 mg/L).
- Power Supply: 5 V DC.
- Dual outputs: Analog (AO) and Digital (DO).
- Onboard potentiometer for digital threshold adjustment.
- Fast response and high sensitivity.
- Works with most common microcontrollers.
Applications
- Alcohol level detection in breathalyzer systems.
- Safety and security monitoring (detect presence of alcohol).
- IoT environmental sensing projects.
- Embedded electronics and DIY maker projects.
- Automotive or industrial alcohol detection systems.
Package Includes
- 1 × MQ-3 Alcohol Gas Sensor Module
Available at Microspark Store – Your Trusted Electronic Component Store! At Microspark Store, we ensure every product is quality-checked and tested before shipping, so you can buy with confidence and start building without worries.
Please Note: Product information has been collected from various sources across the web. While we have made every effort to ensure the accuracy of the information presented, slight variations may still occur. Kindly verify the specifications and compatibility before using this module in your projects.
Disclaimer: Images shown are for illustration only and may not exactly represent the final product. Minor differences may occur due to lighting, display variations, or manufacturer updates. We reserve the right to make changes to the product without prior notice.
