Probe unit

Patent metadata

Field	Value
Publication number	US-2021123785-A1
Application number	US-201816963187-A
Country	US
Kind code	A1
Filing date	Dec 18, 2018
Priority date	Jan 19, 2018
Publication date	Apr 29, 2021
Grant date	—

Abstract

Disclosed is a probe unit for a capacitive and/or conductive apparatus for determining and/or monitoring of at least one process variable of a medium in a containment, comprising a rod-shaped probe body, which is embodied in the form of a hollow body, especially with a cylindrical wall, and which has an internal volume, at least one ring-shaped electrode placeable, especially releasably, around the wall of the probe body, and at least one securement unit, which is embodied to secure the at least one electrode, especially releasably, at a predeterminable position on the probe body. Further disclosed is an apparatus for capacitive and/or conductive determining and/or monitoring of at least one process variable of a medium in a containment and having a probe unit of the present disclosure.

First claim

1 - 10 . (canceled)

11 . A probe unit for a capacitive and/or conductive apparatus for determining and/or monitoring at least one process variable of a medium in a containment, the probe unit comprising:
a rod-shaped probe body embodied in the form of a hollow body having a cylindrical wall and an internal volume; at least one ring-shaped electrode releasably placeable around the wall of the probe body; and at least one securement unit embodied to releasably secure the at least one electrode at a predeterminable position on the probe body.

12 . The probe unit as claimed in claim 11 ,
wherein, in the region of the probe body, at least one opening is provided, which is arranged in the region of the at least one electrode and through which an electrical connection is producible between the at least one electrode and at least one additional component of the apparatus, including a printed circuit board, which can be introduced into the internal volume of the probe body.

13 . The probe unit as claimed in claim 12 ,
wherein the at least one electrode includes an electrical contact spring which leads from the at least one electrode into the internal volume of the probe body when the at least one electrode is secured on the probe body.

14 . The probe unit as claimed in claim 11 ,
wherein the at least one securement unit has at least one snap element.

15 . The probe unit as claimed in claim 14 ,
wherein in a first position of the at least one snap element the electrode is placeable around the probe body, and wherein in a second position of the at least one snap element a securement, including an affixing, of the at least one electrode in the predeterminable position on the probe body occurs.

16 . The probe unit as claimed in claim 11 ,
wherein the at least one electrode is a cast part, a turned part, or a ring-shaped, sheet metal part.

17 . The probe unit as claimed in claim 11 , further comprising:
at least two electrodes, wherein a first of the at least two electrodes is securable by means of a first securement unit at a first predeterminable position on the probe body, and wherein a second of the at least two electrodes is securable by means of a second securement unit at a second predeterminable position on the probe body.

18 . The probe unit as claimed in claim 17 ,
wherein the two securement units are arranged and embodied such that the first electrode and the second electrode are electrically insulated from one another and have a predeterminable separation from one another.

19 . The probe unit as claimed in claim 11 ,
wherein the probe body is made of an electrically insulating material.

20 . An apparatus for capacitive and/or conductive determining and/or monitoring of at least one process variable of a medium in a containment, comprising:
a probe unit, including:
a rod-shaped probe body embodied in the form of a hollow body having a cylindrical wall and an internal volume;
at least one ring-shaped electrode releasably placeable around the wall of the probe body; and
at least one securement unit embodied to releasably secure the at least one electrode at a predeterminable position on the probe body.

Assignees

• Endress Hauser Se Co Kg

Inventors

• Liniger Jeannette
• Schmidt Robert
• Ferraro Franco
• Bechtel Gerd
• Huwyler Willy

Classifications

• G01F23/268 Primary

  mounting arrangements of probes · CPC title

• G01N27/226

  Construction of measuring vessels; Electrodes therefor · CPC title

• G01F23/242

  Mounting arrangements for electrodes · CPC title

• G01N27/228

  Circuits therefor (measuring capacitance per se G01R27/26) · CPC title