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The EMS 775 Turbo Freeze Dryer operates at temperatures down to -140°C and employs a Turbomolecular pumping unit, backed by a Rotary Vacuum pump. The lower temperatures are achieved by using a Liquid Nitrogen fed Cold Stage.
The pre-frozen specimens are admitted into the cooled stage of the drying chamber through a vacuum gate valve which interfaces to the specimen transfer chamber.
The system incorporates both Time and Temperature Control, and at the end of the drying period, the stage may be heated prior to specimen removal. The system also has facilities for purging with Nitrogen Gas.
For extended drying periods, an auto top-up device can be provided as an option to continuously ‘fill’ the chamber’s liquid nitrogen dewar.
The option of a custom designed specimen freezing chamber to produce ‘slushy’ sub cooled liquid nitrogen is available which also interfaces to the specimen transfer chamber.
The option for a carbon or sputter coating attachment without breaking vacuum is available.
Programmable multi-segment sequence control with 10 times and 10 temperatures.
Built-in penning head and gauge. Liquid Nitrogen fed cold stage. Vacuum gate valve to chamber. Vacuum specimen transfer chamber. Accurate time and temperature monitoring. Modular electronics. Clean line design. Polycarbonate safety shield.
Specifications Instrument Case
Work Chamber Plus
Stainless Steel Base Weight
Temperature Monitor Sequence Controller Timer
Vacuum Gauge Range Operating Vacuum
Turbomolecular Pump Cooling
Chamber Dewar Supply
Vacuum Pump Size
450mm(W) x 350mm(D) x 175mm(H) Borosilicate Glass
165mm(Dia.) x 125mm(H) 110mm(Dia.) x 115mm(H)
-140°C to +40°C -140°C to +40°C
10 times and 10 temperatures 0 to 999 Hours 1 x 10-2 1 x 10-2
mbar to 1 x 10-7 mbar to 1 x 10-5
60 litres/Sec (Ultimate vacuum 1 x 10-6 1 Litre Capacity
115V 60Hz (12 Amp Max incl pump) 230V 50Hz (6 Amp Max incl pump)
Complete with vacuum Hose and oil mist filter. 85L/Min
470mm(L) x 150mm(W) x 250mm(H) 20Kg
By liquid nitrogen conductive cooling from 1 liter dewar fitted to the chamber of the unit.