MQ-4 Methane CNG Gas Sensor Module (CH4 Natural Gas Leakage Detection Sensor)

The MQ-4 Methane CNG Gas Sensor Module is a semiconductor gas detection module designed to detect methane (CH4) and compressed natural gas (CNG) in the surrounding environment. It provides both analog and digital outputs, enabling continuous gas concentration monitoring as well as threshold-based gas leakage detection. The module features an onboard comparator with an adjustable sensitivity potentiometer, making it easy to interface with Arduino, ESP32, ESP8266, STM32, Raspberry Pi, and other microcontroller platforms. It is ideal for gas leakage alarms, industrial safety systems, smart homes, environmental monitoring, and embedded gas detection applications.

Key Features -

• Detects methane (CH4) and CNG gas

• High sensitivity to combustible gases

• Analog and digital outputs

• Adjustable detection sensitivity

• Onboard LM393 comparator

• Fast response and recovery time

• Long service life

• Compact PCB module

• Easy interface with microcontrollers

• Suitable for gas leakage detection systems

Specifications -

• Product type - Gas Sensor Module

• Sensor model - MQ-4

• Sensor type - Semiconductor Gas Sensor

• Operating voltage - 5V DC

• Detection gases - Methane (CH4), CNG and Natural Gas

• Detection range - 200ppm to 10000ppm (Typical)

• Output type - Analog Voltage and Digital Signal

• Sensitivity adjustment - Onboard Potentiometer

• Preheat time - Approximately 20 Seconds (Recommended)

• Operating temperature - Minus 10C to 50C

• Operating humidity - 5 Percent to 95 Percent RH

Applications -

• Natural gas leakage detection

• CNG leakage monitoring

• Methane detection systems

• Home gas alarm systems

• Industrial safety monitoring

• Smart home automation

• Environmental monitoring

• Embedded electronics projects