The MQ-3 Alcohol and Ethanol Gas Sensor Module is a highly effective device designed for detecting the presence of alcohol vapor in the air. Its core sensing element is made of tin dioxide (SnO2), which has low conductivity in clean air. When alcohol vapor is present, the sensor's conductivity increases in proportion to the gas concentration. This module is easy to integrate into any project, offering both a real-time analog voltage output and a digital output. The digital output's trigger level can be easily adjusted via an onboard potentiometer, making it simple to interface with microcontrollers like Arduino, ESP32, or Raspberry Pi.

Key Features:

• High Sensitivity to Alcohol: Specifically designed for excellent sensitivity to alcohol (ethanol) vapor with good resistance to gasoline, smoke, and other interfering gases.

• Fast Response and Recovery: Quickly detects changes in alcohol concentration and returns to a baseline state promptly.

• Dual Output Signal: Provides both an analog output for precise concentration measurement and a digital output for simple threshold-based detection.

• Adjustable Sensitivity: An integrated potentiometer allows you to fine-tune the digital output trigger point for your specific application needs.

• Long Lifespan: Built for stable and reliable operation over an extended period.

Technical Specifications:

• Operating Voltage: 5V DC

• Detection Range: 0.05 mg/L to 10 mg/L alcohol

• Sensing Material: Tin Dioxide (SnO2)

• Outputs: Analog (A0) and Digital (D0)

• Dimensions: 32mm x 20mm x 22mm

• Preheat Time: Approximately 20-30 seconds for stable readings

Common Applications:

• DIY Breathalyzers: The most popular application for creating personal or portable alcohol breath testers.

• Automotive Safety Systems: Can be integrated into vehicles to detect alcohol on a driver's breath.

• Environmental and Air Quality Monitoring: Useful for monitoring alcohol vapor in industrial or laboratory settings.

• Robotics: Enable robots to "smell" and identify the presence of alcohol for various tasks.

• Educational Projects: An excellent tool for teaching students about gas sensors, analog-to-digital conversion, and microcontroller interfacing.

Extra Description

Package Includes:

• 1 x MQ-3 Alcohol and Ethanol Gas Sensor Module

Why Choose This MQ-3 Alcohol Sensor? At Hitech Electronics & Hardware, we stand by the quality of our components. This MQ-3 sensor is carefully selected for its reliability and stable performance, ensuring your projects get accurate data you can trust. It's the ideal, cost-effective choice for both prototyping and final builds.

Pro Tip: For best results, calibrate the sensor by taking a baseline reading in clean air. The sensor's resistance varies with temperature and humidity, so allowing it to preheat and stabilize in its operating environment will significantly improve accuracy.