Figure 3
Dry-shipping dewars are used to transport cryogenic samples. (a) A hard-shell insulated box holds the shipping dewar. (b) The dewar can hold a sample-transport device for high-capacity pucks (left) or 50 ml tubes can be placed directly into the storage area. The dewar also has a lockable lid (right with pink cap). (c) When performing a vacuum-failure test, any frosting or condensation observed on the outside of the dewar indicates a vacuum failure. This dewar should not be used for shipping. (d) Critical components are indicated in a cartoon schematic of a dewar cross-section. |