1
Roger L Frick, Stanley E Rud Jr, David A Broden: Process pressure measurement devices with improved error compensation. Rosemount, Westman Champlin & Kelly P A, October 2, 2001: US06295875 (88 worldwide citation)

A device and method are able to compensate for diaphragm deformation (offset) and varying dielectric constants present in a process field environment. The device can be implemented as a pressure sensor or a transmitter having a pressure sensor. The pressure sensor, filled with a dielectric fill-flui ...


2
Roger L Frick, Dean S Pierce, David A Broden: Modular transmitter. Rosemount, Kinney & Lange, May 30, 1989: US04833922 (88 worldwide citation)

A transmitter provides an output that is indicative of pressure and has two modular transmitter bodies, one including a sensor, and the other having an isolator diaphragm with a substantially non-compressible fluid that transfers movement of the isolator diaphragm to the sensor. The bodies each have ...


3
David A Broden, Kelly M Orth, Dale W Borgeson, Jane B Lanctot, Kevin D Voegele: Multivariable transmitter. Rosemount, Westman Champlin & Kelly, March 5, 1996: US05495769 (87 worldwide citation)

In this invention, a multivariable transmitter providing an output representative of mass flow has a dual microprocessor structure. The first microprocessor compensates digitized process variables and the second microprocessor computes the mass flow as well as arbitrating communications between the ...


4
Bennett L Louwagie, Gregory S Munson, David E Wiklund, Michael J Zweber, David A Broden, Brian J Bischoff, Gary P Corpron: Transmitter having input for receiving a process variable from a remote sensor. Rosemount, Westman Champlin & Kelly P A, February 25, 1997: US05606513 (82 worldwide citation)

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 ...


5
Bennett L Louwagie, Gregory S Munson, David E Wiklund, Michael J Zweber, David A Broden, Brian J Bischoff, Gary P Corpron: Differential pressure measurement arrangement utilizing dual transmitters. Rosemount, Westman Champlin & Kelly P A, May 4, 1999: US05899962 (63 worldwide citation)

A two-wire transmitter senses differential pressure, absolute pressure, and process temperature of a process fluid. The information can be used to provide an output representative of mass flow through a pipe. The transmitter has an electronics module housing attached to a sensor module housing. The ...


6
Gregory C Brown, David A Broden: Differential pressure measurement arrangement utilizing remote sensor units. Rosemount, Westman Champlin & Kelly P A, February 9, 1999: US05870695 (51 worldwide citation)

A master transmitter couples to first and second slave units through a bus. The slave units provide outputs to the bus related to first and second pressures of a process. The bus provides power to the units and carries signals. The master transmitter is adapted to couple to a two-wire process contro ...


7
Robert J Karschnia, Charles R Willcox, David A Broden, Brian L Westfield, Kelly M Orth: Process field device with radio frequency communication. Rosemount, Westman Champlin & Kelly P A, August 28, 2007: US07262693 (39 worldwide citation)

A field device for use in an industrial process control or monitoring system includes terminals configured to connect to a two-wire process control loop. The loop carries data and provides power to the field device. RF circuitry in the field device is provided for radio frequency communication. A po ...


8
David A Broden: Apparatus for coupling a transmitter to process fluid. Rosemount, Westman Champlin & Kelly P A, July 6, 1999: US05920016 (39 worldwide citation)

A transmitter of the type used in the process control industry includes a sensor for sensing a process variable and a transmitter body having a sensor coupling. A sensor extension couples to the sensor coupling and includes a sensor coupling face. A first flange interface has a process face which pr ...


9
David A Broden: Apparatus for coupling a transmitter to process fluid having a sensor extension selectively positionable at a plurality of angles. Rosemount, Westman Champlin & Kelly P A, September 16, 1997: US05668322 (33 worldwide citation)

A transmitter of the type used in the process control industry includes a sensor for sensing a process variable and a transmitter body having a sensor coupling. A sensor extension couples to the sensor coupling and includes a sensor coupling face. A first flange interface has a process face which pr ...


10
David A Broden: Modular transmitter with flame arresting header. Rosemount, Westman Champlin & Kelly, February 22, 1994: US05287746 (32 worldwide citation)

A transmitter with a flame arresting header senses a pressure of a process fluid with a diaphragm which is sealed to the header. The diaphragm transfers the pressure of the process fluid acting an outer surface of the diaphragm to a fill fluid that isolates an inner surface of the diaphragm, and a p ...