An automatic liquid nitrogen filling system

Spectroscopic measurements at low temperature require liquid nitrogen in some type of research dewar. Often the research dewar must be refilled from a reservoir dewar several times during the course of an experiment. A system is described which automatically refills a research dewar from a reservoir...

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Bibliographic Details
Published in:Cryogenics (Guildford) 1981-01, Vol.21 (9), p.540-542
Main Authors: Monaghan, C.P., O'Brien Jr, E.J., Good, M.L.
Format: Article
Language:English
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Summary:Spectroscopic measurements at low temperature require liquid nitrogen in some type of research dewar. Often the research dewar must be refilled from a reservoir dewar several times during the course of an experiment. A system is described which automatically refills a research dewar from a reservoir dewar. Two sensors are used for detecting the liquid nitrogen level in the research dewar, and an external nitrogen gas supply is used to provide the pressure to effect the transfer of liquid nitrogen.
ISSN:0011-2275
1879-2235
DOI:10.1016/0011-2275(81)90030-8