Mq3 Alcohol Sensor Detector Gas Sensor Module

Input voltage: DC5V
Power consumption (current) : 150 mA
DO output: TTL digital 1 and 0 (0.1 and 5 V)
AO output: 0.1-0.3 V (pollution-free)
Highest concentration of voltage: Approx 4 V
Detection range of alcohol: detection range of 10 ~ 1000 PPM

MQ3 Alcohol Sensor Detector Gas Sensor Module

The MQ3 Alcohol Sensor Detector Gas Sensor Module is a highly sensitive and cost-effective sensor designed to detect alcohol, ethanol, and other volatile gases in the air. It is widely used in breathalyzer systems, vehicle safety circuits, embedded electronics, and IoT-based applications for monitoring alcohol levels. Ideal for students, hobbyists, and engineers, this module provides both analog and digital outputs for flexible integration.

Equipped with a SnO₂ semiconductor sensor and a built-in heater, the MQ3 offers fast response time and accurate readings of alcohol concentrations. Its compact design and compatibility with popular microcontrollers like Arduino make it a go-to component for safety-focused electronics projects.

Key Features & Technical Specifications:

Target Gases: Alcohol, Ethanol, Benzine
Operating Voltage: 5V DC
Detection Range: 0.05 mg/L to 10 mg/L (Alcohol)
Analog Output Voltage: 0.1V – 4.0V
Digital Output: Adjustable threshold using onboard potentiometer
Load Resistance: 200Ω – 10KΩ
Heater Resistance: 33Ω ± 5%
Response Time: <10 seconds
Preheat Time: ~20 seconds
Indicators: Power & Signal LEDs
Form Factor: Compact PCB module

Applications:

Alcohol breath analyzers
Smart ignition control in vehicles
Workplace safety monitoring
IoT-based air quality & gas detection systems
Arduino & microcontroller learning kits
Home safety devices
Robotics and automation projects
STEM education tools

Microcontroller Compatibility:

The MQ3 sensor is fully compatible with Arduino, ESP32, ESP8266, STM32, Raspberry Pi, and other microcontroller platforms. Its dual output system (analog and digital) ensures smooth operation across diverse projects.

Explore more sensors at ElectroWay Sensor Collection.

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