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Ultra Low Temperature Freezers

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Models:  DF 290 / 490 / 590

The ultimate protection for your samples is ensured by placing the cooling coils inside the shelves to provide the most efficient heat extraction. No reliance on air convection to transfer energy to the walls of the freezer but transfer by conduction with DirectFREEZE™.

When the DF series are used according to instructions, occasionally wiping away the ‘snow’, no ice will form on the door, maintaining efficient cooling.

The chamber of the DF series is designed around the sizes of the most commonly used cryoboxes that account for over 80% of all usage. This means that the maximum numbers of samples are stored in the minimum footprint.

The DF series Ultra Low Temperature Freezers are powered by N-SmArt™ which has internal memory storing temperatures records up to ten years with one hour intervals as digitally and graphically. By means of NuveCloser™ software, The DF series can be controlled via internet. Sample safety is given top priority with audible and visual alarm system and optional NuveWarn™ remote alarm system, plus an optional AlerText™ text message to multiple mobile phones. Sending e-mail up to five e-mail addresses in case of any failure is offered as standard Alarms are independently powered by a permanently recharged battery. The units can be placed in corridors as the door, power switch and optional chart recorder are all key lock protected.


  • Programmable temperature range: -45°C to -90°C
  • Direct and fast freezing with cooling coils entirely situated inside the chamber
  • Independent compartments with insulated doors
  • Programmable microprocessor N-SmArt™ control system
  • Password protected control system
  • 4.3” TFT colourful display for maximum information
  • 5 languages option (Turkish, English, French, Spanish, Russian)
  • Full traceability by keeping the operating parameters digitally and graphically in the memory
  • Internal memory for 10 years data
  • Colour changing error screen
  • Equipped with NuveCom™ communication unit
  • USB port to store the temperature records on memory stick
  • World-wide access via ethernet port with NuveCloser™
  • Rapid support by sending e-mails with the details of the failure
  • RS 232 port for PC or AlerText™
  • Key operated mains power switch to protect your samples
  • Ergonomic door handle with key lock
  • Perfect air tightness with soft gasket and heated surface
  • High density injected polyurethane insulation
  • Alarm for high temperature power failure, temperature sensor failure and open door
  • Programmable temperature alarm range: Set point +5°C to +25°C
  • Re-chargeable battery for control and alarm system
  • Remote alarm outlet
  • Standard outlet for central alarm system

Technical Data:

DF 290 DF 490 DF 590
Minimum Temperature -86 °C**
Freezing System DirectFREEZE™ cooling coils in shelves inside the chamber
Control System N-SmArt™
Display 4,3’’ Colorful TFT Display
Chamber Configuration 3 independent compartments with insulated inner doors 4 independent compartments with insulated inner doors
Temperature Homogeneity ±3°C***
Temperature Stability ±0.5°C***
Temperature Alarm Range Set point +5°C to +25°C
Remote and Central Alarm Contact For all alarm conditions
Alarm Back-up 24-hours with automatically recharged battery
Insulation High density injected polyurethane
Internal Material Stainless steel
External Material Epoxy-polyester powder coated stainless steel
Chamber Volume, Litres 260  (Up to 18,000 cryotubes in cryoboxes) 455  (Up to 32,000 cryotubes in cryoboxes) 560  (Up to 40,000 cryotubes in cryoboxes)
Internal Dimensions (WxDxH) mm 420 x 630 x 995 555 x 630 x 1310 555 x 770 x 1310
External Dimensions (WxDxH) mm 680 x 975 x 1690 820x 975 x 2035 820 x 1120 x 2035
Power Consumption 1600 W 1600 W 1600 W
Power Supply 230 V, 50 Hz
*At 30 °C ambient          **At 20 °C ambient        *** Measured from the samples

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