Magneto-inductive flow meter including a device for continuous quantitative determination of the degree of filling

US11635320B2 · kind B2 · utility

Assignee

• Endress+Hauser Flowtec AG · CH

Inventors

• Stefan Pflüger · Munich, DE
• Winfried Mayer · Hobrechtsfelde, DE

Key dates

• Filing date: Feb 18, 2019
• Grant date: Apr 25, 2023
• Expiry date: Feb 18, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G01F1/58
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Disclosed is a device for measuring fill level of a liquid comprising: a measuring tube having a tube wall extending between first and second terminal openings and which surrounds a volume for guiding the liquid, wherein a tube axis extends between the two tube openings; a first conductor extending at least sectionally around the volume and is electrically insulated from the volume; a second conductor extending at least sectionally around the volume and is electrically insulated from the first conductor and from the volume, wherein the two conductors extend essentially in parallel with one another and form a waveguide for microwaves; an HF circuit for in-coupling a microwave signal into the waveguide and for receiving reflected microwave signals out-coupled from the waveguide; an operating and evaluating circuit for determining fill level of the liquid in the measuring tube based on received microwave signals.