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.

🎥Watch Learning Video:

Watch MQ3 Sensor in Action on YouTube

📍 Available now at ElectroWay – Johar Town, Lahore
ElectroWay is your trusted source for electronics, sensors, and DIY components across Pakistan.