Cryogenic fluid-level sensor
US5744945A · kind A · utility
4Cited by
9References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1994 |
| Grant date | Apr 28, 1998 |
| Priority date | — |
| Expiry date | Nov 8, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/842
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of measuring a cryogenic fluid level utilizing a high temperature ceramic superconductor material driven above its level of critical current density. A high temperature ceramic superconductor is placed in cryogenic fluid and a voltage is applied between two points on the superconductor. The voltage drop is then measured at a third point on the superconductor. This voltage drop corresponds to the change in cryogenic fluid level, and thus can be used to measure the fluid level. Sensitivity of the measurement is increased by driving the high temperature ceramic superconductor above its level of critical current density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.