Probe system for measuring a measured variable of fluid contained in a process container, especially for sterile applications

US8578798B2 · kind B2 · utility

Assignee

• Endress+Hauser Conducta Gesellschaft fuer Mess- und Regeltechnik mbH + Co. KG · DE

Inventors

• Thomas Pfauch · Leipzig, DE
• Ingrid Wunderlich · Radebeul, DE

Key dates

• Filing date: Nov 10, 2010
• Grant date: Nov 12, 2013
• Expiry date: Aug 27, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/283
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A probe system for measuring a measured variable of a fluid, comprising: A probe body, which is connectable to the process container by means of a process connection; axially shiftable in a guiding passageway of the probe body between a measuring position and at least two different treatment positions; an immersion tube, which has a protective cylinder on its front end immersible in the fluid; a measuring probe held in the immersion tube, having a measuring head, wherein the measuring head is arranged within a region of the protective cylinder having openings; a first treatment chamber formed between the guiding passageway and the immersion tube; a second treatment chamber formed between the guiding passageway and the immersion tube and adjoining the first treatment chamber on a side of the first treatment chamber facing away from the process connection; and a seal arranged between the first and second treatment chambers, wherein the immersion tube has a first section with a first outer diameter and a second section adjoining the first section and having a second outer diameter smaller than the first outer diameter, so that, through axial shifting of the immersion tube, the seal ar…