Usage: control the pouring concrete block due to the temperature rise caused by the heat of hydration of cement, the temperature difference between inside and outside and the cooling rate to prevent harmful concrete temperature cracks in concrete construction technology in the construction of mass concrete. The instrument timely test results the feedback actual temperature changes in the field of mass concrete pouring block, as well as the effect of the construction technology adopted measures to provide a scientific basis for the construction and technical personnel to take timely thermostat countermeasures. Technical parameters: 1, temperature range: -50 ℃ -120 ℃ equipment working environment temperature: -20 ℃ -60 ℃ 3. Temperature measurement points: 24 channels (scalable) 4, the maximum length of the sensor is connected: 50 meters Power supply: Terminal 220V/AC, standby power wireless host DC5V 6, means of communication: the local USB communication primitives terminal wireless LAN communication, collection interval :1-99 minutes, test accuracy: 0.5 ° C, the wireless transmission distance: line-of-sight 2km-8km.