It is used to detect the leakage of combustible gases. The detector adopts the most advanced semiconductor gas-sensitive element, which has stable operation, long service life and easy installation. The detector is built-in MCU for central control processing, each function module is directly or indirectly connected to the I/O port line of MCU, and the normal work of each function module of the detector is completed by the programme solidified inside the MCU, which makes the detector work more stable, safe and reliable. If add ZigBee control module, it will realise intelligent data management. This product is suitable for safety monitoring in residential areas, villas, hotels, flats and other places where combustible gas exists.