Pressure sensor with mineral insulated cable
AssigneeRosemount Inc.
InventorsMark Stephen Schumacher, David Andrew Broden
Life of this patent
Estimating the term…
Abstract
A pressure measurement system is provided. The system includes a pressure sensing probe extendable into a process fluid and having a pressure sensor with an electrical characteristic that varies with process fluid pressure. A mineral insulated cable has a metallic sheath with a distal end attached to the pressure sensing probe and a proximal end. The mineral insulated cable includes a plurality of conductors extending within the metallic sheath and being spaced from one another by an electrically insulative dry mineral. The proximal end of the metallic sheath is configured to be sealingly attached to a process fluid vessel.
Claims28
A pressure measurement system comprising:
- a pressure sensor assembly extendable into a process fluid, the pressure sensor assembly having a pressure sensor with an electrical characteristic that varies with process fluid pressure;
- a mineral insulated cable having a metallic sheath with a distal end attached to the pressure sensor assembly and a proximal end, the mineral insulated cable having a plurality of conductors electrically coupled to the pressure sensor and extending within the metallic sheath spaced from one another by an electrically insulative dry mineral;
- and
- wherein the proximal end of the metallic sheath is configured to be sealingly attached to a process fluid vessel.
The pressure measurement system 1, and further comprising a perforated end cap attached to the pressure sensor assembly.
A method of forming a pressure measurement system, the method comprising:
- providing a length of mineral insulated cable;
- stripping a portion of the mineral insulated cable to access a plurality of conductors therein;
- providing a pressure sensor having a plurality of conductive pads;
- electrically coupling respective conductors of the mineral insulated cable to conductive pads of the pressure sensor to form an interconnect area;
- positioning a sleeve around the interconnect area;
- attaching the sleeve to a metallic sheath of the mineral insulated cable;
- positioning a sensor mounting member at an end of the sleeve and attaching the sensor mounting member to the sleeve;
- and
- brazing the pressure sensor to the sensor mounting member.
Dependencies are inferred from the claim text.