Laboratory Freeze Dryers

	Single-Chamber-System (Process A, only for units with LSC-Controller): Freezing and drying of low freezing and thermosensitive substances on cooled shelves (e.g. at -40°C) inside the ice condenser chamber (see figure 1) Typical drying vessels: dishes injection vials (stoppering under vacuum or inert gas)
	Double-Chamber-System (Process B): Separate pre-freezing (e.g. in a deep freezer) and drying of less sensitive material outside the ice condenser chamber (see figure 2) Typical drying vessels: dishes injection vials (stoppering under vacuum or inert gas) round-bottom-flasks, wide neck filter bottles ampoules
1 vacuum pump 2 ice condenser chamber 3 condenser coil 4 acrylic cover 5 drying chamber 6 heatable shelf 7 vacuum-gauge	8 drain valve 9 engine driven intermediate valve 10 stoppering device 11 pressure control valve 12 aeration valve 13 rubber valve 14 thermal insulation

Special features of Martin Christ freeze dryers:

• Compact and powerful benchtop units with minimized space requirements.
• Modular concept for easy enlargement of the capacity with comprehensive range of accessories.
• Ice condenser chamber with inner condenser coil of high-quality steel allows for efficient vapour deposition.
• High-quality insulation of the ice condenser chamber reduces performance losses and avoids condensate formation.
• Ice condenser can be checked visually; easily accessible; rapid, easy defrosting and cleaning.
• Drying chamber is located directly above the ice condenser chamber with large cross-section provides high sublimation performance and reduced drying times.
• Pressure regulation for exact temperature control of the material analog to the vapour pressure curve for ice and water.
• Process-oriented control interfaces LDplus (Lyo-Display) and LSC (Lyo-Screen-Control) for exact and reproducible measurement and control of all process relevant parameters, like vacuum, shelf temperature.

Controller LDplus (Lyo-Display)	Controller Interface LSC (Lyo-Screen-Control)

Ice condenser capacities for every individual application:

When selecting the suitable freeze dryer the following points have to be considered besides the decision on the accessories and drying vessels:

• The required ice condenser temperature (-55°C for aqueous material, -85°C for products containing solvents or low-eutectic material).
• The maximum ice condenser performance (capacity per 24 hours resp. total capacity until defrosting).

Make your choice out of the comprehensive range of basic units and individual accessories.