Julabo CF Cryo-Compact Circulators 3.5 Liter

Category Stirred / Circulating Baths
Manufacturer Julabo
Country of manufacture Germany

The new CF series offers compact refrigerated/heating circulators. With small overall dimensions the units can even be placed on a very small surface or within a complex installation. All models offer a heating capacity of 2 kW and safety class 3 according to DIN12876-1. The maximum ambient temperature of +40°C as well as ventilation air cooling allow installing the units very closely side by side with other units or directly under a fume hood. Furthermore all the models feature pump connections for external temperature applications and a bath opening for temperature control of small objects directly in the circulator bath. Wetted parts are made of high quality stainless steel or plastic. The instruments provide reliable Microprocessor electronics with high temperature stability as well as warning and safety functions.


  • Ergonomic design and easy operation
  • Small overall dimensions for lowest space requirement
  • Splash-proof keypad
  • RS232 interface for PC connection
  • Adjustable high temperature cut-off
  • Classification 3 according to DIN12876-1
  • Pump connections for external temperature applications
  • Bath opening for temperature control of small objects in the bath
  • Front drain

High-tech model offers additional features that allow more precise control than economy models:

  • Bright VFD display and additional interactive LCD dialog display of 3 values,warning functions, high
    temperature cut-off, pump stages (resolution 0.01 °C)
  • Highly precise 'Intelligent Cascade Control', automatic and self optimizing adjustment of PID control parameters
  • TCF Temperature Control Features for individual optimization, additional settings for band limit, limits etc
  • Absolute temperature Calibration for manual compensation of a temperature difference, 3-point calibration
  • Electronically adjustable pump stages for reliable and consistent pump capacity
  • Integrated programmer for the execution of time and temperature dependent profiles, 6 temp profiles with 60 steps max., with real time clock
  • External Pt100 sensor connection for precise measurement
  • Early warning system for low liquid level for maximum safety and for high/low temperature limits
  • 3-point calibration
  • RS232/RS485 interface for PC connection
Key Attributes
Type Stirred / Circulating Baths
Incubation Yes
Refrigeration Yes
Temp Range (°C) Ambient -30 to 200
Capacity (L) 3.5
Circulation Internal & External
Brand Julabo
MaxFlow Rate (l/min) 15, 22-26
Temp Stability (°C) ±0.03, ±0.02
Timer Yes
Alarms Yes
Digital or Mechanical Digital
Data connection Yes
Tank Material Stainless Steel
Sample Agitation No
Media Racks Available No
Warranty (years) 1
Weight (lb) 79
Width (in) 9.4
Depth (in) 18.1
Height (in) 15.7
Manufacturer Specifications
Model No. CF30 CF31
Model series Economy HighTech
Model # CF30 CF31
Working temperature range (°C) -30 ... +150 -30 ... +200
Temperature stability (°C) ±0.03 ±0.02
Setting / display resolution 0.1 °C 0.01 °C
Integrated programmer N/A 6x60 steps
Temperature Display LED VFD , LCD
Heating capacity (kW) 1 1
Cooling capacity (Medium Ethanol)°C 20, 0, -20 20, 0, -20
Cooling capacity (Medium Ethanol) kW 0.32, 0.25, 0.15 0.32, 0.25, 0.15
Pump capacity flow rate (l/min) 15 22-26
Pump capacity flow pressure (psi) 5.1 5.8-10.2
Pump capacity flow suction (psi) N/A 2.9-5.8
Bath opening / bath depth (W x L / D inch) 6.3 x 1.2 / 5.5 6.3 x 1.2 / 5.5
Pump connections M16x1 M16x1
Barbed fittings diameter (inner dia. / mm)  8 / 12  8 / 12
Filling volume (liters) 3.5 3.5
Refrigerant R134a R134a
External Pt100 sensor connection N/A integrated
Digital interfaces RS232, Optional Profibus RS232, RS 485, Optional Profibus
Ambient temperature 5...40 °C 5...40 °C
Dimensions W x L x H (inch) 9.4 x 18.1 x 15.7 9.4 x 18.1 x 15.7
Weight (LBS) 77 79
Classification according to DIN12876-1 Classification III (FL) Classification III (FL)
Included with each unit 2 each barbed fittings for tubing 8 and 12 mm inner dia. (pump connections M16x1 female). 2 each barbed fittings for tubing 8 and 12 mm inner dia. (pump connections M16x1 female).
Cooling of compressor Air Air
Power requirement V / Hz / A 115/60/13 Additional voltage versions available 115/60/14 Additional voltage versions available



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