Differential pressure measuring pickup

US10067023B2 · kind B2 · utility

Assignee

• Endress+Hauser SE+Co. KG · DE

Inventors

• Michael Hugel · Lörrach, DE
• Thomas Uehlin · Schopfheim, DE
• Christian Hahn · Oberböhmsdorf, DE

Key dates

• Filing date: Jan 16, 2015
• Grant date: Sep 4, 2018
• Expiry date: Jul 31, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G01L19/0672
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A differential pressure measuring pickup comprises a measuring pickup body and a differential pressure sensor. The measuring pickup body has a process interfacing surface with a first pressure input opening and a second pressure input opening. The differential pressure sensor can be loaded with a first pressure through the first pressure input opening and with a second pressure through the second pressure input opening. The first pressure input opening is closed by way of a first separating diaphragm and the second pressure input opening is closed by way of a second separating diaphragm. The first separating diaphragm is sealed with respect to the surroundings by way of a first seal, and wherein the second separating diaphragm is sealed with respect to the surroundings by way of a second seal. The differential pressure measuring pickup is tensioned during measuring operation with the process interfacing surface thereof against a process interfacing flange, wherein at least one plate-shaped spacer element with plane-parallel surfaces is clamped in between the process interfacing flange and the process interfacing surface, which spacer element defines the spacing between the process …