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FPW55-SL Ultra-Low Refrigerated Circulators

JULABO®FPW55-SL Ultra-Low Refrigerated Circulators

Water-cooled Ultra-low Refrigerated Circulator with 2-stage cascade-cooling and proportional cooling control

JULABO’s Ultra-Low Refrigerated Circulators for heating and cooling are suitable for external temperature tasks. Powerful circulating pump systems and high heating and cooling capacities guarantee short heat-up and cool-down times. ACC ‘Active Cooling Control‘ provides active cooling control across the whole temperature range. An energy saving feature with only minor loss of heat is provided by the proportional cooling capacity control in the ‘FP’ refrigeration units. The inevitable dust accumulation that occurs in refrigeration systems is solved by means of an easily removed venting grill, which allows for easy cleaning. The units are equipped with handles or castors for an easy transportation. All models have a drain tap on the front allowing the fluid to be drained easily. Additionally the instruments are equipped with an improved insulation to help avoid ice-formation, and have a visual liquid level display.


  • VFD COMFORT DISPLAY, resolution 0.01 °C
  • LCD DIALOG DISPLAY backlit for convenient interactive operation
  • Keypad for setpoints, warning/safety values and menu functions
  • ICC (Intelligent Cascade Control), self-optimizing temperature control
  • TCF Temperature Control Features to optimize the control behaviour
  • ATC3 3-Point-Calibration
  • Pt100 External sensor connection for measurement and control
  • SMART PUMP, electronically adjustable pump stages
  • Early warning system for low liquid level (DBGM 203 06 059.8)
  • Adjustable high temperature cut-out, visible via display
  • RS232/RS485 interface for online communication
  • Integrated programmer for 6 x 60 program steps
  • Connections for solenoid valve and HSP booster pump
  • Proportional cooling control
  • Active Cooling Control

Technical Specifications

Working temperature range -60 ... 100 °C   
Temperature control ICC 
Temperature stability ±0.05 °C
Display VFD + LCD    
Display resolution 0.01 °C
Integrated programmer available 
Heater capacity 3000 W   
Cooling capacity
20   0   -20   -40   -60         °C
5500   4100   2200   1000   130         W
Refrigerant R404A 
Pump capacity Pressure:   10.2 psi   
Suction:   5.8 psi
Flow rate: 22-26 lpm
Digital interfaces RS232, RS485, optional Profibus 
External Pt100 sensor connection available
Bath opening / bath depth (W x L / D) Ø = 2.7 / 9.1 inches
Filling volume 27 Liters
Dimensions (W x L x H) 23.2 x 29.9 x 45.7 inches
Weight 423 lbs
Ambient temperature 5...40 °C
Classification according to DIN 12876-1 3 (FL) 


Optional: Electronic module with analog connections for external programming, temperature recorder, standby, alarm (Order no. 8 900 100) Option: bath opening 28 x 23 cm instead of filling port on request. HST booster heater and HSP booster pump for increased heater and pump capacity available (accessories).

BrookfieldJulaboKonica MinoltaPolyscienceConSpecRay-RanMoisture RegisterAsahi Glassplant, Inc.