Patent · US Expired

Filling level gage

US6606904B2 · kind B2 · utility

19Cited by

8References

14Claims

0Family size

Assignee

Endress+Hauser Inc. · DE

Inventors

Roland Muller · Weiling, DE
Wolfram Lutke · Inzlingen, DE

Key dates

Filing date	Aug 8, 2001
Grant date	Aug 19, 2003
Priority date	—
Expiry date	Aug 8, 2021

Classification

Technology area (CPC G)Physics
CPC primaryG01F23/284
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A filling level gage operating with microwaves, for measuring a filling level of a filling material (5) in a container (1), is provided which functions with a single antenna (7) constructed as simply as possible, and in which a minimum distance required for measurement between the filling material (5) and the antenna (7) is as small as possible, having a microwave generator (9), and an antenna (7) with planar antenna structure, which is used to transmit the microwaves in the direction of the filling material (5) and to receive microwaves reflected from a filling material surface, in which the planar antenna structure has at least two transmission and/or reception elements (11, 13, 33, 35, 37, S, E).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.