The FreeZone Triad Benchtop Stoppering Tray Dryer and Lyophilizer from Labconco has four valves to allow lyophilization in flasks simultaneously with samples in the tray dryer, making this a true multi-purpose freeze dry system. The chamber pre-freezes samples on the shelves, eliminating the need for a separate freezer and product transfer. The collector reaches -85 C and has a 2.5 liter ice-holding capacity. The Tray Dryer has a built-in pneumatic stoppering mechanism that stoppers vials under vacuum. Compressed gas is not required. One temperature probe monitors product temperature. The shelf temperature ranges from -75 C in pre-freeze mode to 50 C for secondary drying. A one-eighth inch OD backfill port introduces sterile air or inert gas before vials are stoppered thereby protecting samples from atmospheric moisture and contaminants. Two ½-CFC-free and HCFC-free refrigeration systems are used in series to cool the collector to -85 C (-121 F), ideal for samples with low eutectic points. They work in concert with a 1,000-watt heater to cool and heat fluid medium circulating through channels in the shelf. A rear-mounted RS-232 port transmits data to a user-supplied computer. Transmission intervals may be user-configured for 10, 20, 60, 300 or 600 minutes.
Labconco, 800-821-5525, www.labconco.com.