Invensys Systems, Inc.

Schneider Electric Systems Usa, Inc.

Paul F Brosnihan

Stephen B Talutis

Javier Lopera

Joseph J Lewicke

A method of making a sensor assembly for a vortex flowmeter includes securing a vortex sensor to a vortex sensor housing. The vortex sensor housing is secured to a sensor body that is configured to seal a process penetration opening to limit flow of process fluid out of the flowmeter through the process penetration opening. A pair of pressure-responsive diaphragms is secured to the vortex sensor housing such that the pressure-responsive diaphragms face outwardly from opposite sides of the housing and such that the vortex sensor is positioned to detect motion of at least one of the pressure-responsive diaphragms. A mounting hole is made in the sensor body spaced apart from the vortex sensor housing. A temperature sensor housing is secured to the sensor body through the mounting hole. A temperature sensor is inserted in the temperature sensor housing for sensing a temperature of the process fluid.

Method of making a multivariable vortex flowmeter

A sensor assembly for a vortex flowmeter having a flowtube, a bluff body in the flowtube, and a sensor that detects vortices. The sensor assembly extends into contact with the process fluid through a process penetration opening. A sensor body seals the process penetration opening to limit flow of process fluid out of the flowmeter through the process penetration opening. A vortex sensor housing is secured to the sensor body. The vortex sensor housing has a pair of pressure-responsive diaphragms facing outwardly from opposite sides of the vortex sensor housing. A vortex sensor is positioned to detect motion of at least one of the pressure-responsive diaphragms to detect vortices formed in the process fluid. A temperature sensor senses a temperature of the process fluid.

Multivariable vortex flowmeter

A vortex flowmeter and method includes a conduit for process fluid flow and a shedder disposed within the central bore of the conduit. First and second diaphragms are mounted in inner wall portions of the conduit, on opposite sides of the shedder. A sensor is disposed externally to the conduit, and is coupled to each diaphragm with fill tubes. The diaphragms respond to pressure variations generated by vortex shedding, and transmit pulse trains through the fill tubes to a sensor. The pulse trains, which are substantially out of phase with one another, are effectively synchronized with one another by reversing phase of one pulse train.

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Millbury, MA, United States of America

Paul F Brosnihan