Level and interface detection
US4471223A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 1982 |
| Grant date | Sep 11, 1984 |
| Priority date | — |
| Expiry date | Mar 9, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/288
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method and apparatus to determine the position of a liquid/liquid or liquid/vapor interface in a remote inaccessible location, for example in undersea oil storage tanks, by exposing the liquids or liquid and vapor to gamma-radiation from a source adjacent to or within the vessel containing the liquid(s) and monitoring the gamma-radiation issuing from the liquids or liquid and vapor, and using long lengths of optical fibre to convey the signals received to a measuring instrument. The invention employs optical fibres which may be up to several hundred meters long and among its advantages is the need for no moving parts, electrical supply or electronics at the remote location.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.