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Detailed Description:

Enhance your safety projects with the MQ-4 CNG Gas Detector Sensor Module, a highly sensitive and reliable component for detecting flammable gases. This sensor is specifically engineered to sense methane (CH4​), the primary component of both Natural Gas and CNG (Compressed Natural Gas). Its high sensitivity to methane makes it an indispensable tool for building effective gas leakage detection and safety systems for homes, industries, and vehicles. The module is built around a robust tin dioxide (SnO2​) sensing material that changes its conductivity in proportion to the gas concentration, providing a stable and accurate measurement.

The module’s versatility is a key feature, as it offers both analog (AO) and digital (DO) outputs. The analog output provides a continuous voltage signal that allows you to measure and log the precise concentration of gas in the air. For simple warning systems, the digital output provides a straightforward HIGH/LOW signal, triggered when the gas concentration exceeds a preset threshold. This threshold can be easily calibrated using the on-board potentiometer, allowing you to customize the sensitivity to your specific application.

Operating on a standard 5V DC supply, the MQ-4 module is fully compatible with popular microcontrollers like Arduino, ESP32, and Raspberry Pi. It is widely used in a variety of projects, from DIY gas leak alarms and portable gas detectors to educational science fair projects and smart home automation systems. With a detection range of 300 to 10,000 ppm, the MQ-4 is a low-cost, high-performance solution for ensuring safety and peace of mind. Whether you are a student, hobbyist, or a professional developer, this gas sensor is an essential component for any project, that requires reliable and accurate gas sensing.

The MQ-4 Gas Sensor Module uses the MQ-4 sensor element to detect methane (CH₄) and other natural gas compounds. The sensor is capable of detecting gas concentrations between 200 ppm to 10,000 ppm, with fast response and recovery time.

It provides both analog output (A0) for gas concentration readings and a digital output (D0) that triggers at a preset threshold, adjustable via the onboard potentiometer. The module is suitable for residential safety devices, smart kitchen appliances, portable gas detectors, and industrial safety projects.

Key Features:

• Detects methane (CH₄), natural gas, and combustible gases

• Dual output: Analog (A0) and Digital (D0)

• Onboard potentiometer for sensitivity adjustment

• Fast response time and high gas sensitivity

• Long operational life and stable performance

• Works with Arduino, Raspberry Pi, ESP8266, ESP32, STM32

• Ideal for gas leak detection, safety systems, and automation

Technical Specifications:

How to Use:

1. Connect VCC to 5V, GND to GND, and A0/D0 to analog/digital pins on your microcontroller.

2. Allow the sensor to preheat (1–2 minutes) for accurate readings.

3. Use analogRead() to measure gas levels or digitalRead() to detect a threshold breach.

4. Use the potentiometer to fine-tune the digital trigger point.

Applications:

• Methane leak detection in homes or factories

• Smart kitchen appliances and safety systems

• Natural gas leak detection systems

• Industrial gas sensing and alarms

• IoT-based gas monitoring solutions

• DIY safety projects and embedded learning

• Portable or battery-powered gas detectors

Package Includes:

• 1 x MQ-4 Gas Sensor Module (Methane/Natural Gas Detector)