MQ-4 Methane Gas Sensor Module

GST

MQ-4 gas sensor module used to detect methane and natural gas in the air. Suitable for gas leakage detection, safety systems, and microcontroller-based projects.

The MQ-4 Gas Sensor Module is designed to detect methane (CH₄) and natural gas in the environment. It is commonly used in gas leakage detection systems, safety monitoring devices, and industrial gas sensing applications.

The module provides both analog and digital outputs, making it easy to interface with microcontrollers such as Arduino, ESP8266, and ESP32. It includes an onboard comparator and adjustable potentiometer for setting the detection threshold.

Due to its reliable gas sensing capability, the MQ-4 module is widely used in IoT projects, smart home safety systems, and educational electronics experiments.

Key Features

Detects methane (CH₄) and natural gas
Adjustable sensitivity using onboard potentiometer
Analog and digital output signals
Onboard LED indicators
Easy interface with microcontrollers
Suitable for Arduino and IoT projects

Technical Specifications

Parameter	Value
Sensor Type	MQ-4 Gas Sensor
Operating Voltage	5V
Detectable Gas	Methane (CH₄), Natural Gas
Output Type	Analog and Digital
Comparator	LM393
Preheat Time	~20 seconds
Interface Pins	VCC, GND, DO, AO