Wide applicationIt applies to all types of seafood machine, HVAC compressor, freezer, refrigerator, air conditioner, fermentation room, freezer, water cooler and other equipment requiring automatic refrigeration changeover and heating. Calibration functionTemperature calibration, you can calibrate the temperature as needed. The digital temperature controller is worth buying. Good practicabilityYou can choose cooling or heating mode. This temperature controller keeps your environment within the desired temperature range. Temperature regulation range: -50-110C. The control accuracy is 0.1C. Input power supply: AC 110-220V. Safety of useYou can set the maximum maximum / minimum temperature to avoid accidents. High temperature alarm, when the measured temperature reaches the setting temperature, the Controller will give an alarm. Easy to useThe thermostat sensor - switch automatically activates cooling or heating to maintain a constant temperature . A comfortable and convenient experience.Circuit Connection: Refer to the Circuit diagram to connect the power supply and load. At this time, the digital tube (top) displays the measured temperature, and the digital tube (bottom) displays the preset temperature. If the temperature sensor is missing or damaged, the digital tube will display "-- --", and the buyer should check whether the temperature sensor is installed before using. The output of Temperature control is a 10A relay, which can meet various high-power loads. Make sure the circuit is correct. Indicator light: off means the relay is disconnected, and on means the relay is closed. Digital tube: display "-- --", 1. Check if the temperature sensor is missing or damaged. 2. High temperature protection of heating mode 3. Low temperature protection in refrigeration mode The relay in protection mode is automatically disconnected. Using keys: the thermostatic panel has three keys, key +, key -,SET Key Legend +: rapid accumulation of values Key: quickly reduce the value Key restart: button restart