GX18B20 series temperature sensor adopts single-bus communication mode, with single-point temperature measurement and distributed temperature measurement function, each chip has a 64-bit ID number, the maximum temperature measurement range of the chip is -80℃~﹢200℃, and the accuracy range is from ±0.8℃ ~±0.1℃, the chip can be networked, and a single channel can cascade up to more than 500 chips. It can be widely used in intelligent storage, moisture detection, industrial temperature measurement and domestic monitoring and other application fields.