公开(公告)号：DE10196145T1

公开(公告)日：2003-04-17

申请号：DE10196145

申请日：2001-05-01

Applicant: ROSEMOUNT INC

Inventor： NORD CHRISTINA A ,  HORKY DAVID A ,  GUTTSEN KENNETH G ,  JOHNSON THOMAS E ,  SHERIN MATTHEW G ,  SZAFRANSKI KEVIN P ,  BALLOT WILLIAM J ,  PATRICK RENAE M ,  HARASYN DONALD E ,  EIDENSCHINK RYAN R ,  SCHANSBERG TODD W ,  ROMO MARK G ,  BEHM STEVEN M ,  LOUWAGIE BENNETT L ,  HEDTKE ROBERT C ,  RUD JUN STANLEY E ,  BREKKEN JEFFREY C

IPC: G01L19/06 ,  G01L19/00 ,  G01L9/00

Abstract: A pressure transmitter with a fluid isolator that includes a sensor tube and a fill tube that have "D" 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.

公开(公告)号：BR9609144A

公开(公告)日：1999-02-17

申请号：BR9609144

申请日：1996-05-31

Applicant: ROSEMOUNT INC

Inventor： ANDERSON STEPHEN D ,  WESTFIELD BRIAN L ,  LOUWAGIE BENNETT L ,  PIECHOWSKI TODD A

IPC: G05B11/36 ,  G05B19/042 ,  G05B19/418 ,  H04L25/02

公开(公告)号：BR9407594A

公开(公告)日：1997-01-07

申请号：BR9407594

申请日：1994-07-29

Applicant: ROSEMOUNT INC

Inventor： LOUWAGIE BENNETT L ,  MUNSON GREGORY S ,  WIKLUND DAVID E ,  ZWEBER MICHAEL J ,  BRODEN DAVID A ,  BISCHOFF BRIAN J ,  CORPRON GARY P

IPC: G01F1/36 ,  G01F1/88 ,  G01F15/06 ,  G01F23/14 ,  G01F23/18 ,  G01L7/08 ,  G01L9/04 ,  G01L19/00 ,  G01L19/08

Abstract: A two-wire transmitter senses a pressure using an internal pressure sensor. The transmitter includes an input for receiving a process variable from a remote sensor which is separated from the transmitter. Circuitry in the transmitters transmits information on a two-wire process control loop which is related to the sensed pressure and the process variable.

公开(公告)号：CA2212384A1

公开(公告)日：1996-09-06

申请号：CA2212384

申请日：1996-02-22

Applicant: ROSEMOUNT INC

Inventor： TOY ADRIAN C ,  FRICK ROGER L ,  LOUWAGIE BENNETT L

IPC: G01L9/00 ,  G01L9/12 ,  G01L13/06 ,  G05D16/20

Abstract: First capacitance pressure sensor (70A, B) has a fusion bonded single crystal structure (sapphire with cavity). Second one (70A, B) has an elongated and thick single crystal structure. Third one (70A, B) uses the electric field emanating from the back sides of the capacitor plates. First differential pressure transmitter uses a process barrier (71) and an elongated member as a sensor (70A, B). Second differential pressure transmitter uses single crystal structures with stress isolation members as sensors (70A, B). Basically thick slab cavity capacitance sapphire sensors are directly exposed to a process fluid. Slab: 15x3x2 cubic mm, cavity cross section: 1mm x 0.5 micro m, capacitance: 42 pF.

公开(公告)号：AU7408394A

公开(公告)日：1995-04-10

申请号：AU7408394

申请日：1994-07-29

Applicant: ROSEMOUNT INC

Inventor： LOUWAGIE BENNETT L ,  MUNSON GREGORY S ,  WIKLUND DAVID E ,  ZWEBER MICHAEL J ,  BRODEN DAVID A ,  BISCHOFF BRIAN J ,  CORPRON GARY P

IPC: G01F1/36 ,  G01F1/88 ,  G01F15/06 ,  G01F23/14 ,  G01F23/18 ,  G01L7/08 ,  G01L9/04 ,  G01L19/00 ,  G01L19/08

Abstract: A two-wire transmitter senses a pressure using an internal pressure sensor. The transmitter includes an input for receiving a process variable from a remote sensor which is separated from the transmitter. Circuitry in the transmitters transmits information on a two-wire process control loop which is related to the sensed pressure and the process variable.

公开(公告)号：CA2105483A1

公开(公告)日：1992-09-30

申请号：CA2105483

申请日：1992-03-24

Applicant: ROSEMOUNT INC

Inventor： BRODEN DAVID A ,  BISCHOFF BRIAN J ,  LOUWAGIE BENNETT L

IPC: G01L7/08 ,  G01L9/00 ,  G01L9/12 ,  G01L13/00

Abstract: A metal thin film bonds a semiconductor bonding region of a diaphragm layer to a ceramic bonding region of a high modulus support block. The arrangement isolates a pressure sensing diaphragm from undesired strain, improving sensor accuracy. A passageway through the support block couples the fluid pressure to the sensing diaphragm to deflect it. Capacitive coupling between the diaphragm and a capacitor plate on the support block sense the deflection and provide an output representative of pressure.