The temperature controllers of the TDR 4020 series working with a microprocessor are characterized by the high control accuracy. The controller is designed for rail mounting. Digital 4-digit display of the actual value and simultaneous display of the setpoint. Range, input type and control function selectable via keypad. Control function: heating/cooling, three-step control and continuous control. PID self-tuning (autotuning), soft start -time temperature profile. When ordering, always specify 2 positions, control unit and sensor.