EKC 101 is a temperature controller for refrigeration and air conditioning systems. It can be used for temperature control, defrost control, and more. The device can be set up and programmed using just two buttons, and it can also be quickly programmed via a serial interface. The device also displays the actual room temperature, and it uses a three-digit display to show the temperature to an accuracy of 0.1°C. EKC 101 is a panel-mounted device that is specifically designed for temperature control in refrigeration and heating systems. Its operation, setup, and programming have been optimized and simplified as much as possible. The device is used to control room temperature and defrost operations by controlling the flow of refrigerant or the start/stop of the refrigeration compressor.