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公开(公告)号：US10520383B2
公开(公告)日：2019-12-31
申请号：US15281723
申请日：2016-09-30
Applicant: Rosemount Inc.
Inventor： Charles Edwin Hunt , Daniel Alan Norberg
Abstract: A differential pressure transmitter configured to provide an absolute pressure measurement is presented. The differential pressure sensor comprises a first process fluid inlet. The differential pressure sensor also comprises a second process fluid inlet. The differential pressure sensor also comprises a differential pressure sensor operably coupled to the first and second process fluid inlets. The differential pressure sensor also comprises an absolute pressure cap coupled to the second pressure inlet. The cap comprises a volume of gas within an expansion feature. The volume of gas has a reference pressure. The expansion feature is configured to allow for expansion of the volume of gas in response to a temperature increase, such that the volume of gas maintains the reference pressure.
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公开(公告)号：US20180094997A1
公开(公告)日：2018-04-05
申请号：US15281723
申请日：2016-09-30
Applicant: Rosemount Inc.
Inventor： Charles Edwin Hunt , Daniel Alan Norberg
Abstract: A differential pressure transmitter configured to provide an absolute pressure measurement is presented. The differential pressure sensor comprises a first process fluid inlet. The differential pressure sensor also comprises a second process fluid inlet. The differential pressure sensor also comprises a differential pressure sensor operably coupled to the first and second process fluid inlets. The differential pressure sensor also comprises an absolute pressure cap coupled to the second pressure inlet. The cap comprises a volume of gas within an expansion feature. The volume of gas has a reference pressure. The expansion feature is configured to allow for expansion of the volume of gas in response to a temperature increase, such that the volume of gas maintains the reference pressure.
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