Gray Dewar:
Manufacture: VBA Cryogenics
Minimum Weight: 78 lbs
White Dewar:
Manufacture: MVE Cryogenics
Minimum Weight: 61 lbs
If dewar in operation reaches the minimum weight, please send a notification to the mailing list 72status@lowell.edu.
Last time the instrument was filled can be located in the Fill Auto-log section on the web page located at
http://lux.lowell.edu/lnweight/