# US 9,752,945 B2 · Coplanar process fluid pressure sensor module > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,752,945 B2 - Document ID: US9752945B2 - Status: Granted - Kind: B2 - Application number: 14/282,367 - Filed: 2014-05-20 - Published: 2014-09-11 - Granted: 2017-09-05 - Earliest claimed: 2011-10-31 - Assignees: Rosemount Inc. - Applicants: Rosemount Inc. - Inventors: Robert C. Hedtke; David A. Broden - Web page: https://patentgrep.com/patent/US9752945B2 ## CPC - G01L 13/026: {involving double diaphragm} - G01L 9/00: Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements {(G01L11/004 takes precedence)}; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means (measuring differences of two or more pressure values G01L13/00; measuring two or more pressure values simultaneously G01L15/00) - G01L 9/0044: {Constructional details of non-semiconductive diaphragms} - G01L 13/025: {using diaphragms} - G01L 19/0038: {being part of the housing (other details about the housing G01L19/14)} - G01L 19/142: {Multiple part housings} - G01L: MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE (weighing G01G) ## Abstract A coplanar process fluid pressure sensor module is provided. The module includes a coplanar base and a housing body. The coplanar base has a pair of process fluid pressure inlets, each having an isolator diaphragm. The housing body is coupled to the coplanar base at an interface between the coplanar base and the housing body. A differential pressure sensor is operably coupled to the pair of process fluid pressure inlets, and is disposed proximate the coplanar base within the housing body. ## Claims ### Claim 1 A coplanar process fluid pressure sensor module, the module comprising: a rectangular coplanar base having a pair of process fluid pressure inlets, each having an isolator diaphragm adjacent an outer face, the coplanar base having a flat surface opposite the inlets which includes a recess formed therein; a housing body coupled to the coplanar base at an interface between the coplanar base and the housing body, the interface arranged on the coplanar base opposite the outer face; a differential pressure sensor operably coupled to the pair of process fluid pressure inlets, and being disposed adjacent the coplanar base within the housing body and positioned at least partially in the recess; and a stiffener plate having an aperture through which the housing body passes, the stiffener plate configured to clamp the housing body between itself and the coplanar base. ### Claim 2 (depends on 1) The coplanar process fluid pressure sensor module of claim 1, wherein the coplanar base is formed of a first metal and the housing body is formed of a material different than the first metal. ### Claim 3 (depends on 2) The coplanar process fluid pressure sensor module of claim 2, wherein the housing body is formed of a different grade of material than the first metal. ### Claim 4 (depends on 3) The coplanar process fluid pressure sensor module of claim 3, wherein the first metal is stainless steel. ### Claim 5 (depends on 4) The coplanar process fluid pressure sensor module of claim 4, wherein the coplanar base and the housing body are coupled at the interface by a weld. ### Claim 6 (depends on 2) The coplanar process fluid pressure sensor module of claim 2, wherein the housing body is formed of a different metal than the first metal. ### Claim 7 (depends on 6) The coplanar process fluid pressure sensor module of claim 6, wherein the different material is aluminum. ### Claim 8 (depends on 6) The coplanar process fluid pressure sensor module of claim 6, wherein the coplanar base is coupled to the housing body at the interface via a shrink fit. ### Claim 9 (depends on 6) The coplanar process fluid pressure sensor module of claim 6, wherein the coplanar base is coupled to the housing body at the interface by swaging. ### Claim 10 (depends on 2) The coplanar process fluid pressure sensor module of claim 2, wherein the coplanar base is formed using metal injection molding. ### Claim 11 (depends on 2) The coplanar process fluid pressure sensor module of claim 2, wherein the housing body is formed from casting. ### Claim 12 (depends on 2) The coplanar process fluid pressure sensor module of claim 2, wherein the housing body is forged. ### Claim 13 (depends on 2) The coplanar process fluid pressure sensor module of claim 2, wherein the housing body is drawn. ### Claim 14 (depends on 2) The coplanar process fluid pressure sensor module of claim 2, wherein the housing body is screw machined. ### Claim 15 (depends on 2) The coplanar process fluid pressure sensor module of claim 2, wherein the housing body is formed from pipe stock. ### Claim 16 (depends on 2) The coplanar process fluid pressure sensor module of claim 2, wherein the differential pressure sensor is coupled directly to a circuit board disposed in an electronics housing separate from the housing body. ### Claim 17 (depends on 2) The coplanar process fluid pressure sensor module of claim 2, and further comprising a temperature sensor disposed within the housing body. ### Claim 18 (depends on 1) The coplanar process fluid pressure sensor module of claim 1, wherein the housing body includes a lip having a diameter greater than the aperture. ### Claim 19 (depends on 1) The coplanar process fluid pressure sensor module of claim 1, wherein the housing body includes an o-ring surface to maintain an o-ring therein. ### Claim 20 A coplanar process fluid pressure sensor module, the module comprising: a rectangular steel coplanar base having a pair of process fluid pressure inlets, each having an isolator diaphragm adjacent an outer surface, the coplanar base having a flat surface opposite the inlets which includes a recess formed therein; a cylindrical housing body coupled to the coplanar base at an interface between the steel coplanar base and the housing body, the cylindrical housing body having an externally threaded portion, the interface arranged on the steel coplanar base opposite the outer surface; a differential pressure sensor operably coupled to the pair of process fluid pressure inlets, and being disposed proximate the coplanar base within the housing body and positioned at least partially in the recess; and a stiffener plate having an aperture through which the housing body passes, the stiffener plate configured to clamp the housing body between itself and the coplanar base.