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US 2014/0109681 A1Published application
Differential pressure transmitter with intrinsic verification
AssigneeAVGI Engineering, Inc.
InventorGeorge E. Sgourakes
Life of this patent
Estimating the term…
Abstract
The present invention provides a dual sensor differential pressure transmitter with a single fill fluid volume that intrinsically eliminates process and environmental performance influences, increases signal level while substantially reducing product costs.
Claims16
1-17. (canceled)
A differential pressure transmitter, comprising:
- a pair of flexible element assemblies each of which is in fluid communication with a respective port,
- each of said flexible element assemblies comprising:
- one or more convolutions and a flexible element end defining a ratio of spring rate to effective area, and
- an electrode capacitively coupled to said flexible element end for sensing a deflection thereof in response to an applied pressure,
- a connector tube containing a fill fluid for hydraulically coupling said flexible element assemblies, and
- means for determining a differential pressure applied to said ports based on the sensed deflections of said flexible element ends of said pair of flexible element assemblies.
3 more elements
The differential pressure transmitter of claim 1, wherein each of the electrodes of said flexible element assemblies is mounted on an insulator attached to a base.
Dependencies are inferred from the claim text.