MQ2 Gas Sensor for Arduino/Raspberry Pi

MQ-2 Gas Sensor Module (Smoke, LPG, Hydrogen Detector)

The MQ-2 Gas Sensor Module is a reliable and cost-effective solution for detecting a wide range of combustible gases including LPG, propane, hydrogen, methane, alcohol, carbon monoxide, and smoke. With a detection range of 300–10000 ppm, it offers higher sensitivity compared to many basic gas sensors, making it ideal for safety and monitoring applications.

This module is easy to integrate with platforms like Arduino, Raspberry Pi, and ESP32. It provides both analog and digital outputs, allowing flexible use in different types of projects.

Key Features

• Wide Gas Detection: Detects LPG, methane, propane, hydrogen, CO, alcohol, and smoke
• Detection Range: 300 to 10000 ppm
• High Sensitivity: Especially responsive to LPG, propane, and hydrogen
• Dual Output: Analog and digital signal support
• Adjustable Sensitivity: Onboard potentiometer for calibration
• Fast Response Time: Quick detection for safety applications
• Durable & Low Cost: Long life with simple and robust design

Applications

• Domestic Gas Leakage Detection
  Used in kitchens and homes for safety monitoring
• Industrial Gas Monitoring
  Detects combustible gases in factories and plants
• Portable Gas Detectors
  Suitable for handheld and mobile sensing devices
• Smart Home Safety Systems
  Integrates with alarms and IoT-based monitoring
• DIY Electronics Projects
  Ideal for projects using Arduino and embedded systems

Working Principle

The MQ-2 sensor uses tin dioxide (SnO₂) as the sensing material. In clean air, it has low conductivity. When combustible gases are present, the conductivity increases proportionally to the gas concentration. This change is converted into an electrical signal that can be read by a microcontroller.

Important Usage Guidelines

• Avoid Water Condensation
  Moisture on the sensor surface can reduce sensitivity
• Avoid High Gas Exposure
  Prolonged exposure to high concentrations may affect performance
• Proper Storage
  Store in clean, dry air for stability
• Stable Environment
  High humidity, temperature, or pollution can degrade performance
• Minimize Vibration & Shock
  Mechanical stress can damage internal connections

Package Includes

• 1 × MQ-2 Gas Sensor Module

Why Choose MQ-2 Sensor?

The MQ-2 offers a versatile, sensitive, and affordable solution for detecting multiple combustible gases. With easy interfacing, adjustable sensitivity, and robust performance, it is an essential component for safety systems, IoT applications, and DIY electronics projects.