Freeze drying significantly reduces the distortion and shrinkage effects that occur when a wet specimen dries by normal evaporation. Freeze drying overcomes this problem by careful sublimation of frozen specimens under vacuum – a process that avoids the liquid phase and thereby reduces distortion effects. The rate of sublimation is a function of temperature and vacuum with typical drying times being several hours or longer.
The K750X Freeze Dryer operates at rotary pump vacuum (typically down to 1 x 10-2 mbar). using a ‘Peltier thermoelectric stage’. The instrument has the following specifications:
- Specimen stage: -60°C to +60°C.
- Timer: 0-999 hours.
- The instrument provides accurate temperature control with automatic drying cycle, enabling user – friendly operation.
- A microprocessor-controlled 10-segment sequence allows 10 time periods and temperature settings to be programmed to achieve a range of drying protocols. Up to 10 different protocols can be stored for future use.
