Ultra-low refrigerated, circulators suitable for external heating and cooling tasks. Powerful circulating pump systems and high heating and cooling capacities guarantee short heat-up and cooling times. The inevitable dust accumulation that occurs in refrigeration systems is solved by means of an easily removed, vent grille. The units are equipped with handles or castors for easy manoeuvring. All models have a drain tap on the front, allowing the fluid to be emptied easily. Additionally the instruments are equipped with improved insulation to help avoid ice-formation, and have a visual liquid level display. VFD Comfort Display, resolution 0.01°C. Keypad for setpoints, warning/safety values and menu functions. PID3 cascade temperature control. ATC3, 3-point calibration. Pt100 external sensor connection for measurement and control. PPC (Pump Pressure Control), electronically adjustable pump capacity. Early warning system for low liquid level (DBGM 203 06 059.8). Adjustable high temperature cut-out, visible via display. RS232 interface. Integral programmer for 10 programme steps. Active Cooling Control. LCD Dialogue Display, backlit for convenient interactive operation. ICC (Intelligent Cascade Control), self-optimising temperature control. TCF Temperature Control Features to optimise control behaviour. RS232/RS485 interface. Integral programmer for 6 x 60 programme steps. Connections for solenoid valve and HSP booster pump.