Gauge pressure sensor

US8763466B2 · kind B2 · utility

Assignee

• ENDRESS+HAUSER GMBH+CO.KG · DE

Inventors

• Elmar Wosnitza · Glückstadt, DE
• Michael Hugel · Lörrach, DE
• Sergej Lopatin · Lörrach, DE
• Thomas Uehlin · Schopfheim, DE
• Olaf Textor · Bad Kötzting, DE
• Hansjörg Brock · Weil am Rhein, DE

Key dates

• Filing date: Feb 28, 2011
• Grant date: Jul 1, 2014
• Expiry date: Feb 28, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G01L19/0609
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A gauge pressure sensor for determining the pressure of a medium by means of a housing and by means of a measuring element, which is positioned in the housing, wherein an outwards facing side of the measuring element is in contact with the medium and is exposed to the pressure, which is to be measured. A tube for a reference pressure is provided, which conducts ambient air to the measuring element, and by means of at least one dehumidifying chamber, positioned in the housing, for the collection of air moisture. The dehumidifying chamber contains a moisture adsorbing material or is primarily composed of a moisture adsorbing material, in that the moisture adsorbing material is at least, in sections, enclosed by a wall, which is composed of a first moisture permeable material, or is at least, in sections, free from a wall, and in that the reference pressure supply tube is at least, in sections, fabricated from a first or second moisture permeable material or in that the reference pressure supply tube has an aperture.