Rosemount Inc.

Kenneth Guttsen

Robert Carl Hedtke

Mark George Romo

Bennett L Louwagie

David Matthew Strei

Stanley E Rud, Jr

Steven M Behm

William J Ballot

David Anthony Horky

Donald Edward Harasyn

Jeffrey C Brekken

Christina A Nord

Todd W Schansberg

Thomas Earl Johnson

Renae M Patrick

Kevin P Szafranski

Matthew G Sherin

Ryan R Eidenschink

David M Strei

A pressure transmitter has a pressure sensor, an isolator diaphragm, and a fill tube. Interior passages in the pressure sensor module body are filled with isolator fluid and provide fluid connections. The isolator fluid couples pressure from the first isolator diaphragm assembly to the pressure sensor. A first crimp portion of the fill tube radially narrows into a substantially solid circular cylindrical cross section to form a first primary seal that is resistant to high pressure cycling.

Pressure transmitter with fill tube

A pressure transmitter with a fluid isolator that includes a sensor tube and a fill tube that have &ldquo;D&rdquo; shaped ends that connect together in a port internal to the transmitter. The shaped ends can be brazed into the port for sealing. Fitting both the sensor tube and the fill tube in the same port provides a low cost isolator with reduced isolator liquid volume. The fluid isolator has an isolator diaphragm with a central diaphragm region overlying a central backing plate that includes a annular groove. The annular groove avoids slow response of the isolator after an overpressure condition.

Pressure transmitter with improved isolator system

Growing community of inventors

Chaska, MN, United States of America

Kenneth Guttsen