The MQ-3 Alcohol Ethanol Gas Sensor Module is a highly sensitive gas detection sensor designed to detect alcohol vapor, ethanol, and smoke in the surrounding air. With its high sensitivity and fast response time, the MQ-3 is commonly used in breath analyzers, alcohol testers, safety systems, and DIY electronics projects.
This module provides both analog output (AO) for variable concentration measurement and digital output (DO) for threshold-based detection using an onboard comparator. It can be easily interfaced with Arduino, ESP32, STM32, and Raspberry Pi for creating custom projects.
The MQ-3 sensor uses a SnO₂ semiconductor layer that changes resistance when exposed to alcohol gases, making it reliable and efficient for alcohol detection applications.
🔹 Also known as: Alcohol Sensor Module, Ethanol Gas Sensor, MQ3 Arduino Sensor, MQ-3 Breathalyzer Module, Alcohol Detection Sensor
If you are looking for an MQ-3 alcohol sensor price in Bangladesh, this module is an affordable and effective choice for gas detection and alcohol measurement projects.
📌 Applications:
Breath analyzers and alcohol testers
Alcohol level monitoring systems
Safety systems and alarms
DIY electronics and Arduino projects
Smart vehicles and driver safety projects
Robotics and automation requiring gas sensing
Sensor Model: MQ-3 Gas Sensor
Detection Gases: Alcohol, Ethanol, Smoke
Operating Voltage: 5V DC
Output Signals:
Analog Output (AO): Continuous voltage proportional to gas concentration
Digital Output (DO): HIGH/LOW signal with adjustable sensitivity (via onboard potentiometer)
Concentration Detection Range: 0.05 mg/L – 10 mg/L Alcohol (approx.)
Response Time: <10s
Preheat Time: 20 seconds (recommended)
Interface Compatibility: Arduino, ESP8266, ESP32, STM32, Raspberry Pi
Module Features: Power LED, status indicator LED, sensitivity adjustment potentiometer
