Micromotion Gmbh

Mobrey Limited

George Macdonald

Craig Brainerd Van Cleve

Tinghu Yan

David Malcolm Campbell

A vibrating meter comprises a vibrating element with a longitudinal direction and a cross-sectional area in a plane perpendicular to the longitudinal direction. The vibrating element moves between a first position and a second position in a plane perpendicular to the longitudinal direction of the vibrating element. An electronics is operable to drive the vibrating element between the first position and the second position. A boundary element and the vibrating element define a fluid velocity boosting gap having an average gap distance between the boundary element and the vibrating element. The vibrating element includes a gap-facing perimeter section facing the fluid velocity boosting gap having a gap perimeter length. In embodiments, a ratio of the gap perimeter length to the average gap distance is at least 160. In further embodiments, the average gap distance is 0.25 mm or less.

Vibrating meter with gap

An apparatus is provided that comprises a vibrating member (). The vibrating member () is for a vibrating densitometer (). The vibrating member () includes one or more apertures (). The one or more apertures () are sized and located in the vibrating member () to increase a frequency separation between a resonant frequency of a desired vibrational drive mode and a resonant frequency of one or more undesired vibrational modes.

Vibrating densitometer including an improved vibrating member

The invention provides a method of calibrating a vibrating tube densitometer intended to operate at combined elevated temperatures and pressures.

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Wokingham, United Kingdom

George Macdonald