Coriolis mass flow/density sensor

US6401548B1 · kind B1 · utility

Assignee

• Endress+Hauser Flowtec AG · CH

Inventors

• Wolfgang Drahm · Erding, DE
• Georg Szaloky · Basel, CH
• Alfred Wenger · Neftenbach, CH
• Ennio Bitto · Aesch, CH
• Ole Koudal · Reinach, CH
• Christian Matt · Lörrach, DE
• Christian Schutze · Basel, CH

Key dates

• Filing date: Oct 7, 1999
• Grant date: Jun 11, 2002
• Expiry date: Oct 7, 2019

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N11/162
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A Coriolis mass flow/density sensor which can be installed in a pipe and through which a fluid to be measured flows during operation is balanced over a wide density range so that accurate measurements are possible. The Coriolis mass flow/density sensor includes a measuring tube, an excitation arrangement for exciting the measuring tube to vibrate in a second fundamental flexural mode of vibration; and a counterbalance member attached to the measuring tube which counterbalances the vibration of the measuring tube. A cantilever can be attached to the measuring tube midway between the inlet end and the outlet end of the measuring tube. First and second sensors sense the measuring tube vibration on the inlet and outlet sides of the measuring tube, respectively.