MQ-2 Smoke LPG Butane Hydrogen Gas Sensor Detector Module

Looking for a reliable, affordable, and high-sensitivity gas detection module for your electronics or safety projects? The MQ-2 Smoke LPG Butane Hydrogen Gas Sensor Detector Module is one of the most widely used combustible gas sensors for home automation, industrial safety, and IoT-based gas monitoring systems.

Product Overview

The MQ-2 Gas Sensor offers a wide detection range of 300–10,000 ppm, making it ideal for sensing harmful or flammable gases at low concentrations. It operates using a gas-sensitive SnO₂ material, which exhibits low conductivity in clean air and rapidly increases conductivity when exposed to combustible gases such as LPG, methane, hydrogen, propane, smoke, CO, and alcohol vapors.

Designed with simplicity and durability in mind, this sensor includes both analog and digital outputs, allowing it to interface easily with microcontrollers like Arduino, ESP32, Raspberry Pi, or other automation systems. The onboard potentiometer enables adjustable sensitivity, ensuring accurate readings based on application needs.

Why Choose This MQ-2 Gas Sensor Module?

• Wide detection range suitable for safety and automation systems
• High sensitivity to LPG, propane, hydrogen, methane, CO, and smoke
• Fast response time for real-time monitoring
• Supports both analog and digital output signals
• Easy integration with Arduino and IoT microcontrollers
• Low-cost, long-life sensor—ideal for prototypes and production
• Adjustable sensitivity using onboard potentiometer

Common Applications

• Domestic gas leakage detection systems
• Smart home safety and automation
• Industrial combustible gas monitoring
• Portable gas detectors and alarm devices
• IoT-based environmental monitoring systems
• Fire safety and smoke detection projects
• STEM learning & embedded electronics education

Important Usage Precautions

• Avoid long-term exposure to high gas concentrations
• Do not operate or store in extreme humidity or temperature
• Prevent water condensation on sensor surface
• Keep away from excessive vibration or mechanical shock
• After long storage, allow sensor burn-in time for stability

Key Features

• High sensitivity to a wide range of combustible gases
• Detection range: 300–10,000 ppm
• Simple drive and interface circuit
• TTL digital output (0–5V) plus analog output
• Adjustable sensitivity using onboard potentiometer
• Low power consumption with stable sensing characteristics
• Compact, lightweight design for easy installation

Specifications