Food Freeze Dryer (8kg /-40⁰C) Food Freeze Dryer is a device that uses Vacuum Drying Technology to remove moisture from the Food, which can extend the shelf life while remaining nutrients, Flavor and appearance. Freeze drying is a process whereby water or other solvent is removed from frozen materials by converting the frozen water directly into vapour without the intermediate formation of liquid water. The basis for this sublimation process involves the absorption of heat by the frozen sample in order to vaporize the ice; the use of a vacuum pump to enhance the removal of water vapor from the surface of the sample; the transfer of water vapor to a collector; and the removal of heat by the collector in order to condense the water vapor. In essence, the freeze dry process is a balance between the heat absorbed by the sample to vaporize the ice and the heat removed from the collector to convert the water vapor into ice 7" Touch Screen Display SS304 Tray Graph can view Password Protection Easy to move with wheels, locking wheels for stability Quick Mode, Professional Mode, Frozen Mode, Defrost Mode Vacuum Pump (DSVP66) as a Standard Supply Temperature Range is -40°C System can store data of 10recipes Transparent Acrylic door for easy view