MQ-4 Gas Sensor Module – Methane & Natural Gas Detection

The MQ-4 Gas Sensor Module is a high-sensitivity sensor designed for detecting methane (CH₄), natural gas, and LPG present in the air. It is widely used in gas leak detection and safety systems due to its reliable performance, quick response, and long-term stability. This module is suitable for both residential and industrial environments where early gas detection is critical.

The sensor provides both analog and digital output signals, allowing easy and flexible interfacing with popular microcontrollers such as Arduino, Raspberry Pi, ESP32, ESP8266, PIC, and STM32. This makes it an excellent choice for beginners, students, and professionals working on embedded systems, automation, and IoT-based projects.

Operating at a standard 5V DC supply, the MQ-4 module can detect gas concentrations ranging from approximately 200 ppm to 10,000 ppm. The detection range can be adjusted using the onboard load resistor, enabling customization based on specific application requirements. Its fast response and recovery time allow for real-time gas monitoring and timely alerts.

The sensor element is durable and designed for long-lasting use, ensuring stable and consistent readings over extended periods. The compact module includes a pin header, making it easy to connect directly to development boards or breadboards without complex wiring, which simplifies installation and prototyping.

The MQ-4 Gas Sensor Module is commonly used in gas leak detectors, home automation and safety systems, industrial gas monitoring setups, IoT-based smart sensors, robotics, automation projects, environmental monitoring systems, and DIY electronics safety applications.

Choosing the MQ-4 sensor module means selecting a dependable, sensitive, and easy-to-integrate solution for gas detection. Its balance of performance, durability, and compatibility makes it an ideal choice for anyone developing effective methane and natural gas monitoring systems.