Rosemount Inc.

Eugene Korolev

John Paul Schulte

David Glen Tyson

Nicholas John Haywood

Dmitry Yuryevich Iosifov

Andrey Yevgenyevich Popov

Peter J Flanagan

Vladimir Viktorovich Repyevsky

An industrial process differential pressure sensing device includes a housing having first and second isolation cavities that are respectively sealed by first and second diaphragms, a differential pressure sensor, a static pressure sensor, an eddy current displacement sensor, and a controller. The static pressure sensor is configured to output a static pressure signal that is based on a pressure of fill fluid in the first isolation cavity. The differential pressure sensor is configured to output a differential pressure signal that is indicative a pressure difference between the first and second isolation cavities. The eddy current displacement sensor is configured to output a position signal that is indicative of a position of the first isolation diaphragm relative to the housing. The controller is configured to detect a loss of a seal of the isolation cavity based on the position signal, the static pressure signal and the differential pressure signal.

Pressure sensing device isolation cavity seal monitoring

A field device includes a housing that contains field device circuitry, a display coupled to the field device circuitry and viewable through the housing, and a movable control positioned around the housing, the movable control including a magnet. The field device further includes a sensing element disposed within the housing and configured to detect movement of the magnet. In addition, the field device includes a processor coupled to the display and the sensing element. The processor is configured to identify a position of the movable control, based on the detected movement of the magnet, and control a user interface on the display, based on the identified position of the movable control.

Local operator interface for a field device

A process variable transmitter includes transmitter circuitry for determining a process variable from a sensor signal produced using a process sensor. The transmitter circuitry has at least one operating parameter. The process variable transmitter also includes a wireless communication module configured to be powered by a two-wire process control loop. The wireless communication module is capable of communicating wirelessly with a general-purpose mobile device using a general-purpose wireless communication standard such that the wireless communication module can instruct the transmitter circuitry to change a value of the at least one operating parameter based on a wireless message received from the general-purpose mobile device.

Process variable transmitter with loop-powered wireless transceiver

A field device for use in an industrial process, includes a process interface element configured to measure or control a process variable. Communication circuitry is configured to communicate with another location. A communication system is configured to provide communications between at least two components in the field device. A signal inverter couples an inverted signal from the communication system to other circuitry to thereby reduce interference received by the other circuitry.

Communication system for process field device

A process transmitter is configured to measure a process variable of an industrial process. The process transmitter includes a process variable sensor which senses the process variable and responsively provides a process variable sensor output. Sensor circuitry is coupled to the process variable sensor. A housing to encloses the sensor circuitry and the output circuitry. The sensor circuitry electrical couples to the housing. The sensor circuitry wirelessly communicates with the output circuitry.

Wireless interface within transmitter

In a process variable transmitter, a sensor signal is sampled, using a clock signal, at a sensor sampling frequency. Interference is also sampled at the sensor sampling frequency. A comparison is made to determine whether the interference at the sensor sampling frequency or harmonics of the sensor sampling frequency exceed a threshold level. If so, the clock signal is changed to adjust the sensor sampling frequency away from the frequency of the interference.

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Maple Grove, MN, United States of America

Eugene Korolev