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Lab Expo offers a variety of freeze dryers, including benchtop, large scale, pilot, and floor standing units. They have variable condenser capacities and work at low temperatures for efficient drying. They use oil mist filtering systems and vacuum pump oil return mechanisms to maintain vacuum pressure and avoid leaks. They have clear acrylic doors that indicate the sample temperature, vacuum curve, and cold trap temperature. These include external USB connections for data export and alerts for extreme temperatures. Our freeze dryers are easy to clean, featuring anti-corrosion cold traps and working tables.
FAQ for Freeze Dryers
1: What is a freeze dryer, and how does it work?
Freeze dryers remove moisture from frozen samples via sublimation under vacuum, first freezing the sample, then drying it under low pressure, preserving structure and sensitive compounds.
2: Why is a vacuum pump required?
A vacuum pump lowers chamber pressure so ice sublimes directly to vapor without melting, essential for efficient primary and secondary drying.
3: How to choose between a benchtop and a manifold freeze dryer?
Benchtop (shelf-based) models suit bulk tray drying; manifold models allow drying of individual flasks or vials and flexible sample removal.
4: How cold should the collector be?
For aqueous samples, a collector at 50?°C is sufficient. For solvent-based samples like acetonitrile or methanol, colder temperatures are recommended to prevent melt-back.
5: How long does a freeze-drying cycle typically take?
Lab freeze-drying cycles generally take 20–40 hours for most samples, depending on sample type, volume, and thickness.
