Methane CNG Gas Sensor - MQ-4

The Sparkfun Methane CNG Gas Sensor - MQ-4 is a convenient and easy-to-use sensor designed for detecting compressed natural gas (CNG) concentrations in the air. It is capable of identifying natural gas levels anywhere from 200 to 10,000ppm, offering a high degree of sensitivity and a rapid response time. The MQ-4 sensor outputs an analog resistance, with a simple drive circuit that requires only a 5V power supply for the heater coil, a load resistance, and an ADC connection.

The MQ-4 sensor is housed in a package that is similar to the MQ-3 alcohol sensor from Sparkfun. It is compatible with a breakout board for ease of use. This compact sensor is an ideal choice for those who require a reliable and efficient means of monitoring natural gas concentrations.

One of the key benefits of using the MQ-4 sensor is its high sensitivity and fast response time. This ensures that users can quickly detect and respond to changes in natural gas levels, which is especially important in situations where safety is a concern. The sensor's simple drive circuit also makes it easy to set up and use, even for those who may not have extensive technical knowledge or experience.

Another unique property of the MQ-4 sensor is its versatility. While it is primarily designed to detect natural gas, it can also be used to monitor other types of gases. This makes it a valuable tool for a wide range of applications, from industrial monitoring to home safety systems.

For more information, please refer to the datasheet and wiring example provided. These resources offer detailed instructions and guidance on how to use the MQ-4 sensor, ensuring that users can make the most of its features and capabilities.