Level transmitter

US6310574A · kind A · utility

Assignee

• VEGA Grieshaber KG · DE

Inventors

• Josef Fehrenbach · Lenzkirch, DE
• Karl Griessbaum · Nettetal, DE

Key dates

• Filing date: Aug 5, 1999
• Grant date: Oct 30, 2001
• Expiry date: Aug 5, 2019

Classification

• Technology area (CPC G): Physics
• CPC primary: G01F23/284
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A level transmitter for use in a process application measures the height of a product level in a container, e.g., in a tank. The level transmitter includes an electromagnetic wave antenna directed into the tank. An electromagnetic wave source sends an electromagnetic wave signal through the electromagnetic wave antenna. An electromagnetic wave receiver receives the reflected electromagnetic wave signal. Measurement circuitry coupled to the source and receiver initiates transmitting of the electromagnetic wave signal and determines product level height based upon the received, reflected signal. Output circuitry transmits information related to product height. The device is suitable for use with containers having very small orifices for antenna insertion.