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

The MQ-4 Gas Methane CNG Detector Sensor Module is a semiconductor gas sensing module designed to detect methane (CH₄), compressed natural gas (CNG), and natural gas leakage in the surrounding environment. It provides both analog and digital outputs, allowing continuous gas concentration monitoring as well as threshold-based leak detection. Featuring an onboard LM393 comparator and adjustable sensitivity potentiometer, the module interfaces easily with Arduino, ESP32, ESP8266, STM32, Raspberry Pi, and other microcontroller platforms. It is widely used in gas leakage alarms, industrial safety systems, smart homes, and environmental monitoring applications.

Key Features -

• Detects methane (CH₄), CNG and natural gas

• High sensitivity to combustible gases

• Analog and digital output signals

• Adjustable detection threshold

• 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 to 60 Seconds

• 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