MQ-4 Gas Sensor Module

The MQ-4 Gas Sensor is a reliable and low-cost sensor designed to detect methane (CH₄), natural gas, and CNG. It is widely used in gas leakage detection systems, safety alarms, and DIY electronics projects. The module provides both analog and digital outputs, making it easy to interface with microcontrollers like Arduino, Raspberry Pi, ESP32, and more.

 Key Features

• Detects Methane (CH₄), Natural Gas, and CNG

• High sensitivity with fast response time

• Analog output for gas concentration measurement

• Digital output with adjustable threshold (via onboard potentiometer)

• Long life and stable performance

• Built-in heater coil for accurate sensing

• Easy to use with standard development boards

 Technical Specifications

• Target Gases: Methane (CH₄), Natural Gas, CNG

• Operating Voltage: 5V DC

• Output Type: Analog & Digital

• Detection Range: 200 – 10,000 ppm (approx.)

• Heater Resistance: ~33Ω

• Warm-up Time: 20–30 seconds (recommended longer for accurate readings)

• Operating Temperature: -10°C to +50°C

Applications

• Gas leakage detection systems

• Domestic gas safety alarms

• Industrial gas monitoring

• Smart home safety projects

• Arduino & Raspberry Pi projects

• Educational and research experiments

 Why Choose MQ-4 Gas Sensor?

• Cost-effective solution for methane detection

• Simple interfacing and calibration

• Trusted sensor for hobbyists and professionals

• Ideal for safety and automation projects