MQ-3 Alcohol Gas Sensor Module

The MQ-3 Alcohol Gas Sensor Module is a high-sensitivity gas detection module designed to detect alcohol vapors (ethanol) in the surrounding environment. Featuring the reliable MQ-3 gas sensor and onboard signal conditioning circuitry, it provides both analog and digital outputs for easy interfacing with Arduino, ESP32, STM32, Raspberry Pi, and other microcontroller platforms. The module is widely used in alcohol detection systems, breath analyzer projects, safety monitoring, smart automation, and IoT applications. The MQ-3 Alcohol Gas Sensor Module is available at Directronics and is ideal for students, hobbyists, makers, educators, and professional engineers.

Features:

• Detects Alcohol (Ethanol) Vapors

• High Sensitivity and Fast Response

• Analog and Digital Output

• Adjustable Digital Output Threshold via Onboard Potentiometer

• Onboard Power and Status LEDs

• LM393 Comparator for Stable Digital Output

• Standard 4-Pin Interface

• Easy Integration with Microcontrollers

• Compact and Durable PCB Design

• Suitable for Alcohol Detection Applications

• Compatible with Arduino, ESP32, STM32, Raspberry Pi, and Other Controllers

• Ideal for Robotics, IoT, and Embedded Projects

Why Choose MQ-3 Alcohol Gas Sensor Module?

• Optimized for alcohol vapor detection

• Provides both analog and digital outputs for flexibility

• Adjustable sensitivity for various applications

• Easy to interface with popular development boards

• Reliable performance for alcohol sensing projects

• Suitable for beginners, students, hobbyists, and professionals

Applications:

• Alcohol Detection Systems

• Breath Analyzer Projects

• Smart Safety Systems

• Industrial Monitoring

• IoT Monitoring Projects

• Environmental Monitoring

• Educational Electronics Projects

• Robotics Applications

• Prototype Development

• STEM Learning Projects

Technical Specifications:

• Product Type: Alcohol Gas Sensor Module

• Sensor Model: MQ-3

• Detectable Gas: Alcohol (Ethanol)

• Operating Voltage: 5V DC

• Operating Current: Approximately 150mA (Including Heater)

• Output Type: Analog (AO) and Digital (DO)

• Digital Output: TTL Logic Level

• Comparator IC: LM393

• Sensitivity: Adjustable via Onboard Potentiometer

• Warm-Up Time: Recommended for Accurate Measurements

• Operating Temperature: -10°C to +50°C

• Module Dimensions: Approximately 32 × 22mm

Package Includes:

• 1 × MQ-3 Alcohol Gas Sensor Module

Related Products:

• Arduino Uno

• ESP32 38Pin Development Board

• Raspberry Pi Pico W

• MQ-2 Gas Sensor Module

• MQ-7 Carbon Monoxide Gas Sensor Module

• MQ-135 Air Quality Sensor Module

• Breadboard

• Jumper Wire Kit

• 5V DC Power Supply Module

• LCD Display Module

Why Buy from Directronics?

Directronics provides quality development boards, communication modules, sensors, electronic components, robotics modules, power management solutions, and IoT products for students, makers, educational institutions, startups, and industry professionals. Explore our complete range of Arduino, ESP32, ESP8266, Raspberry Pi, power modules, motor drivers, programming tools, and embedded development products to bring your ideas to life.

Note:

Product images are for illustration purposes only. Actual PCB color, component placement, and module dimensions may vary depending on the manufacturing batch. The MQ-3 sensor requires a warm-up period before providing stable readings and is intended primarily for alcohol (ethanol) vapor detection. It is not a calibrated breathalyzer sensor and should not be used for medical, legal, or law enforcement purposes. For accurate gas concentration measurements, proper calibration and controlled operating conditions are recommended. Avoid exposing the sensor to water, corrosive gases, or excessive dust for optimal performance.