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公开(公告)号：AU2015229218B2
公开(公告)日：2017-12-07
申请号：AU2015229218
申请日：2015-03-13
Applicant: ROSEMOUNT INC
Inventor： HEDTKE ROBERT C , SITTLER FRED C , WILLCOX CHARLES R
Abstract: A corrosion rate measurement system (130) includes a first membrane (160) of a first material configured to be exposed to a corrosive material and deflect in response to corrosion. A second membrane (162) is configured to be exposed to a corrosive material and deflect in response to corrosion. A pressure sensor (134) is operably coupled to at least one of the first and second membranes (160, 162) and configured to measure deflection of at least one of the first and second membranes (160, 162) as a function of a pressure and an amount of corrosion at least one of the first and second membranes (160, 162).
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公开(公告)号：CA2694936C
公开(公告)日：2016-11-29
申请号：CA2694936
申请日：2008-08-05
Applicant: ROSEMOUNT INC
Inventor： SITTLER FRED C , HEDTKE ROBERT C
Abstract: A process variable transmitter (12) for use in an industrial process control or monitoring system includes a transmitter housing and a process variable sensor (72) having a sensor output related to a process variable. An accelerometer (80) is coupled to the transmitter and provides an accelerometer output related to acceleration. Diagnostic circuitry (82) provides a diagnostic output as a function of the sensor output and the accelerometer output.
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公开(公告)号：AU2015229218A1
公开(公告)日：2016-09-08
申请号：AU2015229218
申请日：2015-03-13
Applicant: ROSEMOUNT INC
Inventor： HEDTKE ROBERT C , SITTLER FRED C , WILLCOX CHARLES R
Abstract: A corrosion rate measurement system (130) includes a first membrane (160) of a first material configured to be exposed to a corrosive material and deflect in response to corrosion. A second membrane (162) is configured to be exposed to a corrosive material and deflect in response to corrosion. A pressure sensor (134) is operably coupled to at least one of the first and second membranes (160, 162) and configured to measure deflection of at least one of the first and second membranes (160, 162) as a function of a pressure and an amount of corrosion at least one of the first and second membranes (160, 162).
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公开(公告)号：CA2941012A1
公开(公告)日：2015-09-17
申请号：CA2941012
申请日：2015-03-13
Applicant: ROSEMOUNT INC
Inventor： HEDTKE ROBERT C , SITTLER FRED C , WILLCOX CHARLES R
Abstract: A corrosion rate measurement system (130) includes a first membrane (160) of a first material configured to be exposed to a corrosive material and deflect in response to corrosion. A second membrane (162) is configured to be exposed to a corrosive material and deflect in response to corrosion. A pressure sensor (134) is operably coupled to at least one of the first and second membranes (160, 162) and configured to measure deflection of at least one of the first and second membranes (160, 162) as a function of a pressure and an amount of corrosion at least one of the first and second membranes (160, 162).
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公开(公告)号：CA2916108A1
公开(公告)日：2014-12-31
申请号：CA2916108
申请日：2014-06-03
Applicant: ROSEMOUNT INC
Inventor： HEDTKE ROBERT C , SITTLER FRED C
Abstract: A process fluid pressure measurement probe (100) includes a pressure sensor (112) formed of a single-crystal material and mounted to a first metallic process fluid barrier (130) and disposed for direct contact with a process fluid. The pressure sensor (112) has an electrical characteristic that varies with process fluid pressure. A feedthrough (122) is formed of a single-crystal material and has a plurality of conductors extending from a first end to a second end. The feedthrough (122) is mounted to a second metallic process fluid barrier (116) and is spaced from, but electrically coupled to, the pressure sensor (112). The pressure sensor (112) and the feedthrough (122) are mounted such that the secondary metallic process fluid barrier (116) is isolated from process fluid by the first metallic process fluid barrier (116).
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Patent Agency Ranking56.发明专利
公开(公告)号：MX2013000351A
公开(公告)日：2013-03-22
申请号：MX2013000351
申请日：2011-06-01
Applicant: ROSEMOUNT INC
Inventor： SITTLER FRED C , BRODEN DAVID A , KLOSINSKI ANDREW J , HEDTKE ROBERT C
Abstract: Un transmisor (36) de variable de proceso para medir una presión de un fluido de proceso incluye un acoplamiento de proceso que tiene una primera lumbrera (90) configurada para acoplarse con una primera presión de proceso y una segunda lumbrera (90) configurada para acoplarse con una segunda presión de proceso. Un sensor (56) de presión diferencial se acopla con la primera y segunda lumbreras y proporciona una salida relacionada con una presión diferencial entre la primera presión y la segunda presión. El primer y segundo sensores (97, 98) de presión se acoplan con la primera y segunda lumbreras respectivas y proporcionan salidas relacionadas con la primera y segunda presiones. La circuitería (72) del transmisor se configura para proporcionar una salida del transmisor de acuerdo con la salida del sensor de presión diferencial y/o el primer y segundo sensores de presión.
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公开(公告)号：DE19882225B4
公开(公告)日：2009-07-09
申请号：DE19882225
申请日：1998-03-06
Applicant: ROSEMOUNT INC
Inventor： SITTLER FRED C
Abstract: A process control transmitter includes a transmitter housing and transmitter circuitry adapted for providing a transmitter output related to a sensed pressure. A sensor coupling in the housing defines a pressure sensor cavity which is filled with isolation fluid. An isolation diaphragm separates the sensor cavity from a process fluid and is adapted to transmit pressure therebetween. The pressure sensor is mounted in the sensor cavity and provides an output related to pressure to the transmitter circuitry. A thermal compensation member is coupled to the sensor cavity and has a thermal expansion coefficient which is different than a thermal expansion coefficient for the sensor coupling. The compensation member is adapted to compensate for pressure changes due to thermal expansion of the components or isolation fluid.
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公开(公告)号：CA2694936A1
公开(公告)日：2009-02-12
申请号：CA2694936
申请日：2008-08-05
Applicant: ROSEMOUNT INC
Inventor： SITTLER FRED C , HEDTKE ROBERT C
Abstract: A process variable transmitter (12) for use in an industrial process control or monitoring system includes a transmitter housing and a process variable sensor (72) having a sensor output related to a process variable. An accelerometer (80) is coupled to the transmitter and provides an accelerometer output related to acceleration. Diagnostic circuitry (82) provides a diagnostic output as a function of the sensor output and the accelerometer output.
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公开(公告)号：DE10392623T5
公开(公告)日：2005-07-07
申请号：DE10392623
申请日：2003-04-17
Applicant: ROSEMOUNT INC
Inventor： SITTLER FRED C , NORD CHRISTINA A , ROMO MARK G
Abstract: A pressure sensor assembly includes an elongate pressure sensor mounted to a sensor mounting block. A protective element covers the elongate pressure sensor to prevent the pressure sensor from contacting process fluid.
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公开(公告)号：AU2443201A
公开(公告)日：2001-07-16
申请号：AU2443201
申请日：2000-12-20
Applicant: ROSEMOUNT INC
Inventor： LUTZ MARK A , FRICK ROGER L , SITTLER FRED C , TOY ADRIAN C
Abstract: A pressure sensor integrally formed in the shape of a beam around a central channel. The beam has an integral blind end that is pressurized by the fluid. The beam has an opposite end that is shaped to provide a stepped corner with a gap opening at the base of the stepped corner, where the gap and isolated from the fluid. A sensing film in the channel adjacent the blind end has an electrical parameter that varies with pressure and electrical leads that extend from the channel and out the gap. A seal fills the gap around the leads and the seal fills a portion of the stepped corner. The sensor is preferably formed by direct bonding of single crystal alumina layers. Applications include industrial pressure transmitters, aerospace and turbine engine pressure sensing.
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