Granted Patent B2

US 12,736,385 · App. 18/847,468 · Granted Sep 15, 2026

Inventors: Lars Stolz (Eimeldingen, DE); Robert Schmidt (Schopfheim, DE); Gerd Bechtel (Steinen, DE)

Assignee: Endress+Hauser SE+Co. KG

G01F23/241G01F23/268G01F23/2962G01F23/24G01F23/248G01F23/26

Abstract

Claims (22)

1 . An electrical assembly for an electrical fill level measuring device for measuring a fill level of a medium in a containment, the electrical assembly comprising:

an electrically conductive probe adapted for conducting an electrical signal, wherein the electrically conductive probe is adapted to be immersed into the medium, wherein the electrically conductive probe has in an axial direction a central region and two end regions, wherein the probe has a plastic coating in the central region; and

a process connection that is adapted to seat the electrically conductive probe radially, wherein the electrically conductive probe extends sectionally via an open end of the process connection into a lumen of the process connection;

wherein the electrically conductive probe is held radially relative to the process connection by a rotationally symmetric seal, and wherein the rotationally symmetric seal is connected with the plastic coating by material bonding by a weld method.

2 . The electrical assembly as claimed in claim 1 , wherein the electrically conductive probe is seated by the rotationally symmetric seal radially relative to the process connection.

3 . The electrical assembly as claimed in claim 1 , wherein the rotationally symmetric seal includes a stop that is adapted to act against a stop of the process connection.

4 . The electrical assembly as claimed in claim 1 , wherein the electrically conductive probe is seated radially and/or axially in a medium far end region by a seating means rotationally fixed in at least one rotational direction.

5 . The electrical assembly as claimed in claim 1 , wherein the rotationally symmetric seal includes a thermoplastic or is made of the thermoplastic.

6 . The electrical assembly as claimed in claim 1 , wherein the plastic coating is applied on an electrically conductive probe core of the electrically conductive probe by extrusion.

7 . The electrical assembly of claim 1 , wherein the weld method includes a mechanical friction welding method, rotational friction welding, rotational vibration welding, or ultrasonic welding.

8 . An electrical fill level measuring device for measuring a fill level of a medium in a containment, comprising:

an electrical assembly, including:

an electrically conductive probe adapted for conducting an electrical signal, wherein the electrically conductive probe is adapted to be immersed into the medium, wherein the electrically conductive probe has in an axial direction a central region and two end regions, wherein the probe has a plastic coating in the central region;

a process connection that is adapted to seat the electrically conductive probe radially, wherein the electrically conductive probe extends sectionally via an open end of the process connection into a lumen of the process connection;

wherein the electrically conductive probe is held radially relative to the process connection by a rotationally symmetric seal, wherein the rotationally symmetric seal is connected with the plastic coating by material bonding by a weld method;

an electronic measuring/operating circuit adapted for producing and evaluating electrical signals as well as for providing fill level measured values or a connection for such an electronic measuring/operating circuit; and

a housing in which the electronic measuring/operating circuit or the connection for the electronic measuring/operating circuit is arranged.

9 . The electrical fill level measuring device as claimed in claim 8 , wherein the electronic measuring/operating circuit is adapted to derive the fill level of medium from a measured electrical current, or a measured capacitance or a signal travel time of an electrical pulse.

10 . The electrical fill level measuring device as claimed in claim 8 , wherein the electronic measuring/operating circuit is connected with a housing near end region of the probe via an electrically conductive terminal apparatus.

11 . A method for producing a fill level measuring device, wherein a probe of the fill level measuring device has in the axial direction a central region with a plastic coating, the method comprising:

leading a rotationally symmetric seal over an end of the probe to the central region, wherein seal and the plastic coating form a press fit with one another; and

establishing a relative movement between the seal and the probe such that the seal and the plastic coating become sectionally connected together by material bonding as a result of friction.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (13)