Measuring and testing – Volume or rate of flow – Using differential pressure
Reexamination Certificate
2005-01-18
2005-01-18
Lefkowitz, Edward (Department: 2855)
Measuring and testing
Volume or rate of flow
Using differential pressure
Reexamination Certificate
active
06843139
ABSTRACT:
An instrument used to control fluid flow. The instrument has a flow restrictor between an inlet and an outlet. First and second multisensor have sensing surfaces in the inlet and outlet that sense pressures and temperatures of the fluid flow. A circuit generates a mass flow output based on a difference between the pressure in the inlet and the pressure in the outlet. The mass flow output including a temperature correction as a function of at least one of the sensed temperatures in the inlet and outlet.
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Broden David A.
Schumacher Mark S.
Wiklund David E.
Mack Corey D.
Rosemount Inc.
Westman Champlin & Kelly
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