Methane Gas Sensor MQ-4

This top - notch semiconductor gas sensor is designed to detect methane (CNG) gas. It can sense gas concentrations ranging from 300 ppm to 10,000 ppm, making it perfect for detecting gas leaks. With a simple analog voltage interface, it only needs one analog input pin from your microcontroller.

Using this Methane Gas Sensor MQ - 4 is easy. First, connect it to your microcontroller using the analog input pin as described. Then, power it up and let it start detecting methane gas. When the gas concentration is within the 300 - 10,000 ppm range, it will send signals to your microcontroller. As for maintenance, keep it clean and dry. Avoid exposing it to extreme temperatures or strong chemicals. If you notice any issues, check the connections first. If the problem persists, it might need to be replaced.