Liquid helium level sensor for use in a cryogenic environment and method for assembling same
US6925873B2 · kind B2 · utility
3Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 16, 2003 |
| Grant date | Aug 9, 2005 |
| Priority date | — |
| Expiry date | May 21, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/22
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention provides a method and apparatus for measuring the level of a liquid cryogen. The invention provides for use of a current source (52), a length, or multiple lengths, of superconducting filament (40) situated within a cryostat (1) containing a cryogenic fluid (2) and a voltmeter (51) for measuring the voltage drop across the filament (40). The invention further provides a method for using said apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.