Julabo FP51-SL


Julabo FP51-SL

JULABO 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.


Order No. 9352751
Model Series HighTech
Working Temperature Range (°C) -51°... +200°
Temperature Stability (°C) ±0.05
Temperature Control ICC intelligent cascade control, TCF temperature control features, Absolute temperature calibration 3-point
Display Resolution 0.01 °C
Integrated Programmer 6x60 steps
Temperature Display VFD, LCD
Heating Capacity (kW) 3
Cooling Capacity 0.26 kW @ -40 °C, 1 kW @ 20 °C,
1.5 kW @ 0 °C, 2 kW @ 20 °C
Pump capacity Flow Rate (l/min) 22-26
Pump Capacity Flow Pressure (psi) 5.8-10.2
Pump Capacity Flow Suction (psi) 2.9-5.8
Pump Connections M16x1
Filling Volume Liters 11
Bath opening / bath depth (W x L / D inch) 7.1 x 4.7 / 7.9
Barbed fittings diameter (inner dia. / mm) 8/12
Refrigerant R507
External Pt100 Intergrated
Digital Interface RS232, RS485, Optional Profibus
Ambient Temperature 5…40 °C
Noise Level (dBA) 53
Classification Classification III (FL)according to DIN 12876-1
Included with 2 barbed fittings for tubing 8 and 12mm inner dia (pump connections M16x1)
Analog Connection Input/Output Optional
Cooling Coil optional Accessory (8970243)
Cooling of Compressor Air
Power requirement V / Hz / A 3x 230/60/14
Heaters 3kW
Cooling capacity °C 2kW (@ 20°C), 1.5kW (@ 0°C), 1kW (@ -20°C), 260W (@ -40°C)
Alarm Signal acoustically & optical
Temperature Selection / Display °C / °F
Volumetric Capacity Liters 11
Outer dimensions W x L x H inch 18.1 x 23.6 x 35.4
Available Voltage Versions
  • 230V/3Ph/50Hz 
  • 400V/3Ph/50Hz 
  • 230V/3Ph/60Hz 
  • 230V/3Ph/60Hz  (Canadian and US NRTL Certified) 
Other Characteristics Optional: Electronic module with analog connections for external programming, temperature recorder, standby, alarm (Order no. 8 900 100).
Characteristics / Display Additional plain text
information: LCD dialog display for interactive operation with plain text
display, Easy to read VFD Comfort display for simultaneous display of 3 values, warning functions, high temperature cut-off, pump stages (resolution 0.01 °C), Pump stage and liquid level: Backlit indicator for selected pump stages and filling volume
Characteristics / Operation Comfortable and detailed: Comfortable keypad with additional menu functions for pump stages, calibration, control parameters, programmer, warnings, etc.
Characteristics / Temperature Control For perfect results: Intelligent Cascade Control, automatic & self optimizing adjustment of PID control parameters, temperature stability ±0.005 °C internal,
Characteristics / Refrigeration Technology 100 % Cooling capacity: Active Cooling Control for cooling available throughout the entire working temperature range, fast cool-down even at higher temperatures, Condensation and ice protection: A heated cover plate prevents condensation or ice build-up in the bath, Consistent cooling capacity: Easily removable venting grid for quick and easy cleaning, Energy saving cooling: Proportional cooling control for automatic adjustment of cooling power or temporary switch-off of compressor as needed to save up to 90 % energy in comparison to unregulated co.
Characteristics / Technical Features Clever pump system: Reliable and consistent pump capacity, electronically adjustable pump stages, Control from the external application: External Pt100 sensor connection for precise
measurement and control directly in the external application, Connection compliant to standard: RS232/RS485 dual-interface for serial data transmission according to EIA-485 industry standard (2-wire bus technology), upgradable with Profibus DP, Optimal program control: For the execution of time and temperature dependant profiles, 6 temperature profiles with 60 steps max., with real time clock, Automatic control of operating time: Electronic countdown-timer function for timer-programmed unit shut-down, standby mode after programmed time expires.
Characteristics / Warning & Safety Functions Early warning system for high/low temperature limits: Maximum safety for applications, optical and audible alarm, convertible to automated cut-off function, Early warning system for low liquid level: Maximum safety for applications, optical and audible alarm, allows user to refill bath fluid before the unit shuts down, Enhanced protective functions : Maximum safety, adjustable high temperature cut-off or dry-running protection, additional display of setpoints permits easy and precise adjustments, For flammable bath fluids: Classification III (FL) according to DIN 12876-1

Julabo FP51-SL

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SKU: 9352751.16.N


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