Rosemount Inc.

Carl Raymond Gansen

Fred Charles Sittler

Stanley E Rud, Jr

A process transmitter has a housing that contains transmitter circuitry. The transmitter circuitry is configured to provide a display output and is also configured to couple to a process control loop. A LCD display is embedded within a transparent or translucent polymeric layer in the housing. The LCD display is coupled to the display output and is configured to display information through the polymeric layer.

Instrument housing with embedded liquid crystal display within plastic layer

A field device in an industrial process control system having an electrically grounded housing with an electrical circuit located within the housing is described. The electrical circuit includes wireless communication circuitry and is electrically isolated from the housing. The field device also includes an antenna that is attached to the housing and a cable having a shield positioned between the wireless communication circuitry and the antenna. The cable provides electrical communication between the electrical circuit and the antenna. The electrical circuit is electrically isolated from the housing, and the shield of the cable is electrically grounded to the housing.

Link coupled antenna system on a field device having a grounded housing

A capacitive pressure sensor is formed with sensor body and diaphragm components made of near net shapeable sintered ceramic. In one configuration, the differential pressure sensor has two sintered ceramic cell halves with an internal sintered ceramic diaphragm captured between the two cell halves. In another configuration, two side-by-side sintered ceramic cell halves have individual sintered ceramic diaphragms, and the chambers of the two cell halves are connected by metal tubing.

Pressure sensor using near net shape sintered ceramics

A pressure transmitter with first and second absolute pressure sensors receives process pressures from corresponding first and second process inlets. A transmitter circuit coupled to the first and second absolute pressure sensors generates a differential pressure type output. A third absolute pressure sensor coupled to the transmitter circuit receives atmospheric pressure from a third inlet. The transmitter circuit generates a second type of transmitter output that can be a gage or absolute pressure type. Single crystal. sapphire pressure sensors are preferred to provide enough accuracy for measuring accurately over 200:1 pressure range.

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Belle Plaine, MN, United States of America

Carl Raymond Gansen