MQ-3 Alcohol Gas Sensor Module for Arduino Breathalyzer and Alcohol Detection Projects

KSh600.00

● In stock (25 available)

SKU	AT-0110
Category	Sensors
Availability	In stock
Shipping	Countrywide delivery · Free on orders over KSh10,000.00

Description

The MQ-3 Alcohol Sensor Module is a highly sensitive gas detection module designed to detect alcohol vapor in the air. It is especially optimized for ethanol and is commonly used in breathalyzer projects, alcohol detection systems, vehicle safety devices, smart monitoring systems, and Arduino-based electronics projects. The module uses a semiconductor gas sensor that changes its resistance when exposed to alcohol vapor. An onboard comparator circuit converts this change into both analog and digital outputs, making it easy to interface with Arduino, ESP32, Raspberry Pi, STM32, and other microcontrollers. The MQ-3 sensor is most sensitive to alcohol and ethanol vapors, but it can also respond

Key Features

Detects alcohol and ethanol vapor
High sensitivity to alcohol gas
Analog and digital output
Adjustable sensitivity using onboard potentiometer
Compatible with Arduino, ESP32, STM32, Raspberry Pi, and other microcontrollers
Fast response and recovery time
Onboard power and output indicator LEDs
Suitable for breathalyzer and gas detection projects

Specifications

Operating voltage	5V DC
Detection range	approximately 0.04–4 mg/L alcohol concentration
Easy 4-pin interface	VCC, GND, AO, DO
Typical module size	approximately 32 × 22 × 27 mm