Changes to GEN2 1841 Cryogenic Freezer

The larger part of the changes to the 1841 cryogenic freezer from Gen1 to Gen2 involves changes to the plumbing. The latest back enclosure is alike to those used on the 611 and 1411 cryogenic freezer models. As the 611 and 1411 cryogenic freezer models, the enclosure contains the same plumbing, battery backup, power, and gas bypass assemblies. Furthermore, as on the 611 and 1411 cryogenic freezer models, the mounting brackets are the same.  On the exterior, the lid has been modified to account for the slightly deeper rear enclosure. As the inner and outer shells remain the same, the capacity remains the same.