Superconductor technology: apparatus – material – process – High temperature devices – systems – apparatus – com- ponents,... – Measuring or testing system or device
Patent
1994-05-31
1997-01-14
Gutierrez, Diego F. F.
Superconductor technology: apparatus, material, process
High temperature devices, systems, apparatus, com- ponents,...
Measuring or testing system or device
73295, 73304R, 338 80, 505842, 505847, G01F 2324, H01L 3904
Patent
active
055939490
ABSTRACT:
Method and arrangement for detecting the level of a liquid cryogen having a predetermined boiling point and which is being held in a container relative to the bottom of the container. The arrangement includes a container which receives the liquid cryogen and a longitudinal extending sensing member having a length extending from the bottom of the container to a level that is greater than any depth experienced for the liquid cryogen. The sensing member is vertically disposed in the container with one end in contact with the bottom of the container and the other end extending out of the liquid cryogen. The sensing member is composed of a high temperature superconductor material having a critical temperature that is higher than the predetermined boiling point of a selected cryogen. An electrical current is passed through the sensing member and the voltage drop across the sensing member is measured. The voltage drop is representative of the portion of the sensing member extending above the level of the liquid cryogen and thereby is indicative of the level of the liquid cryogen presently contained within the container.
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Dawson Kenneth R.
Leung Eddie M.
Duncan John R.
Gilliam Frank D.
Gutierrez Diego F. F.
Lockheed Martin Corporation
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