High Capacity Dewar Refrigerator for Cryo Specimen Storage

The High Capacity (HC) Series Dewar Refrigerators by Worthington Industries (formerly Taylor-Wharton) are designed for storing large quantities of a variety of materials at or close to liquid nitrogen temperature. The VHC35 model is convenient for storing frozen samples in a cryo-EM lab. VHC35 dewar features a wide 4.7in diameter neck for better visibility and easier access and six 3.7in wide canisters (with a possibility to add a seventh canister for extra storage capacity), all in a relatively compact form. A 10 or 4 liter dewar flask (#81750-10, 81750-4) can be used to conveniently maintain the level of liquid nitrogen without disturbing the stored samples. A special roller base (#81750-35-1) greatly helps with mobility.

Dry Cryo Shipper

The CX100 Dry Shipper Dewar from Worthington Industries is the only cryo shipper endorsed by a major cryo-electron microscope manufacturer. The unique adsorbent material inside prevents a liquid spill if the dewar is tipped over, while the storage temperature inside the chamber is maintained at -190C. The samples are kept inside a standard Worthington dewar canister. Two outer cases are available for shipping the dewar; the square case is sturdier, more stable and is preferred in most cases.

Complies with IATA regulations for open cryogenic receptacles. The lid can be locked; Temperature loggers are available.

Foam Cryo Dewars

Foam dewars provide a neat and handy alternative to heavier vessels or the commonly utilized styrofoam shipping containers. The special foam material is chemically inert and mechanically durable enough to be exposed directly to liquid nitrogen, without leaking or degrading. Patented design makes the foam vessel easier to handle and safer to use than a traditional low profile glass dewar. Because of its lower thermal mass, a foam vessel will cause less liquid nitrogen boiling when it is filled. The foam surface will also accumulate less frost. As a result, less liquid nitrogen is consumed.

Available as 500ml, 800ml and 1400ml Cryo Cups featuring convenient protruding handle, a Tall (1800ml) vessel, and a Mini (130ml) vessel.

• Efficiency assured by rigid bakeout and evacuation control (evacuated to 10^-5 torr or better).
• Evacuation tip completely shielded for increased protection.
• Weighted bases on all models for stability.
• Optional full length metal housing on most models for added protection.
• No pads between walls on cylindrical dewars eliminating this heat transfer potential.
• Supplied polyethylene stopper tops off dewars to minimize evaporation.
• Holding time 2-6 hours depending on volume.

Standard Base

Full Base

• Aluminum metal housing extends full length of dewar for added protection.
• The dewar lip is extended to facilitate pouring.
• Polyethylene stopper, specially vented, minimizes evaporation.
• Holding time 2 - 6 hours depending on volume.