GAS SENSOR - MQ-4

The MQ-4 Gas Sensor is a semiconductor gas sensor designed to detect methane (CH₄) and natural gas concentrations in the surrounding environment. It operates by changing its electrical resistance when exposed to combustible gases, producing analog and digital output signals that can be easily interfaced with microcontrollers such as Arduino, ESP32, STM32, Raspberry Pi, and PIC. The sensor offers high sensitivity to methane, fast response time, stable performance, and long operational life. Due to its reliable gas detection capability, the MQ-4 sensor is widely used in gas leakage detection systems, industrial safety monitoring, smart home gas alarms, environmental monitoring, and IoT-based gas sensing applications.