Guided wave radar level gauge with improved sealing arrangement
US8842039B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 2012 |
| Grant date | Sep 23, 2014 |
| Priority date | — |
| Expiry date | Apr 20, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A radar level gauge for determining a filling level of a product contained in a tank. The gauge has a sealing arrangement comprising a hollow housing, a conductor and a dielectric sleeve arranged inside the housing and surrounding the conductor. At least one gap is formed between the dielectric sleeve and an adjacent, electrically conducting surface, the gap having a first end which is open to an interior of the tank, so that in use, tank atmosphere may enter and condensate in the gap. The sealing arrangement further comprises an electrically conducting coating provided on a surface of the dielectric sleeve facing the gap, and in electrical contact with said adjacent, electrically conducting surface, so that an impedance between the electrically conducting coating and the adjacent electrically conducting surface is sufficiently low at an operating frequency of the gauge to reduce an influence of any medium present in the gap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.