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Labo Cube External Closed Circulation Cooling Water Circulator, Low-floor Inverter Type


Labo Cube External Closed Circulation Cooling Water Circulator, Low-floor Inverter Type

High power capacity and can be installed under the fume hood or sink.
Model: CFE920 is 2 way circulation type, which enables to perform the cooling operation with 2 rotary evaporator at the same time.

CFE820 CFE920
Operating Temp. Range
-20 deg.C to 20 deg.C
Cooling capacity
Approx. 1100W at liquid temp 0 deg.C
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  • High power and lower power consumption type with inverter. (Up to 35%. Compared with our previous model)
  • Suitable for synthesis tests using rotary evaporators or for cooling external equipment that suddenly changes temperature.
  • Especially at low temperature range (0 to 20 deg.C) to demonstrate its power.
  • Circulation flow control cock and Drain pan for overflow are equipped as standard.

Model CFE820 CFE920
Circulation Type Closed System Circulation By Pump 
Operating Temperature Range -20 deg.C to 20 deg.C
Temp. adjustment accuracy JTM K05/ Temp. fluctuation JIS (Load) ±0.5 deg.C (JTM K05) at -20 deg.C / ±0.8 deg.C ( JIS) at -20 deg.C
Cooling Capacity Approx. 1,100W at Liquid temp. 0 deg.C
Approx. 730W (559kcal/h) at Liquid temp. -10 deg.C
Approx. 270W (215kcal/h) at Liquid temp. -20 deg.C
External circulation capacity
pump max flow
8.2/9.5L/min (50/60Hz) 12/14L/min (50/60Hz)
(2 total system)
External circulation capacity
pump head
9.5/13m (50/60Hz)
External circulation system number 1 system 2 system
External circulation nozzle Nozzle is option (Rc3/8 with stop valves) 
Tank SUS304
Temp. control Refrigerator inverter frequency control, Refrigerator ON/OFF operation (depends on the conditions, 3 minutes) 
Sensor T thermocouple
Temp. setting / display Digital setting/display
Refrigerator  Air cooling sealed rotary type 700W
Coolant R407C
Cooling coil Copper-nickel coated
Circulation pump Magnet pump 125W
Ambient temperature range (during operation) 5 deg.C to 35 deg.C
 Safety Device
Safety Countermeasures Over current electrical leakage breaker, Refrigerator over load relay, Overheating (30 deg.C or more), Refrigerator high pressure relay, Pump thermal protector, Delay timer for protecting refrigerator, H bypass for protecting pump, Inverter overload protecting circuit
Other Functions Drain cock, Dust prevention filter, Water level gauge, Drain pan for overflow/circulation nozzle, Calibration offset function
Water tank Dimension W245 x D315 x H184
Water tank material Stainless SUS304
External Dimension W620 x D440 x H600
Tank capacity 14L (liquid volume 13L)
Power Source (50/60Hz) AC100V 13A 50/60Hz
Weight Approx. 65kg
Accessories Lid, Drain pan for overflow/circulation nozzle

Control panel Water tank

Example of installing under fume hood

When installing under fume hood or lab table,
exhausting the accumulated hot air (minimum 3 m/min) is recommended.




Dimensional drawing (mm)


Cooling curve

Optional Accessories
Description Main Unit
Model No.
Item Code
"Note"External combination terminal CFE820/CFE920 221592
"Note"Temp. output terminal CFE820/CFE920 221593
"Note"External alarm terminal CFE820/CFE920 221594
"Note"Exhaust blower combination terminal CFE820/CFE920 221597
Buchi combination cable CFE820/CFE920 221598
Heat-resistant circulation hose (2m. X 2pcs., 6mm dia, High insulation type) CFE820/CFE920 221595
Heat-resistant circulation hose (2m. X 2pcs., 9mm dia) CFE820/CFE920 221581
Heat-resistant circulation hose (2m. X 2pcs., 9mm dia, High insulation type) CFE820/CFE920 221599
Hose set for Buchi connection CFE820/CFE920 221589
Straight circulation nozzle 8mm dia Rc3/8 CFE820/CFE920 221596
Straight circulation nozzle 10.5mm dia Rc3/8 CFE820/CFE920 221394
Straight circulation nozzle 13.0mm dia Rc3/8 CFE820/CFE920 221399
Straight circulation nozzle 16.0mm dia Rc3/8 CFE820/CFE920 221395
Note: The item marked "Note" shall be ordered together with the main unit.

External combination terminal/Temp.
output terminal/External alarm terminal

Heat-resistant circulation hose

Straight circulation nozzle

Heat-resistant circulation hose
(High insulation type)
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