The product is a wall-mounted high protection grade shell, protection grade IP65, rain and snow protection and good air permeability. The circuit adopts industrial grade microprocessor chip imported from the United States and imported high-precision temperature sensor to ensure excellent reliability, high precision and interchangeability. This product uses particle sintering probe sheath, the probe and shell directly connected with beautiful appearance. Output signal type are divided into RS485, can communicate up to 2000 meters, standard modbus protocol, support secondary development.