Process measurement technology sensor

Patent metadata

Field	Value
Publication number	US-11268836-B2
Application number	US-201916700070-A
Country	US
Kind code	B2
Filing date	Dec 2, 2019
Priority date	Dec 3, 2018
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

Process measurement technology sensor, comprising a sensor housing having a sensor head, wherein the sensor head has at least one sensor element for determining a measurand of a measured medium which is arranged inside the sensor housing, and wherein the sensor has electronic measuring equipment which is arranged inside the sensor housing, wherein the sensor housing has, at a distance from the electronic measuring equipment and from the sensor element, a condensation trap in the form of a local region of a wall of the sensor housing with reduced wall thickness.

First claim

The invention claimed is:

1. A process measurement technology sensor, comprising:
a sensor housing having a sensor head;
a sensor element for determining a measurand of a measured medium, wherein the sensor element is disposed in the sensor head and is arranged inside the sensor housing; and
electronic measuring equipment which is arranged inside the sensor housing,
wherein the sensor housing has, at a distance from the electronic measuring equipment and from the sensor element, a condensation trap in the form of a local region of a wall of the sensor housing having reduced wall thickness.

2. The process measurement technology sensor according to claim 1 , wherein the wall thickness of the condensation trap is at least 20% less than a wall thickness of adjacent regions of the sensor housing.

3. The process measurement technology sensor according to claim 1 , the wall of the sensor housing has a grooved or corrugated surface in the local region of the condensation trap.

4. The process measurement technology sensor according to claim 1 , wherein the sensor housing includes a tubular sensor shaft which is connected to the sensor head, wherein the condensation trap is designed as a local region running circumferentially along an inner wall of the sensor shaft.

5. The process measurement technology sensor according to claim 1 , wherein the sensor head has an end face, and wherein the condensation trap is arranged in the region of the end face.

6. The process measurement technology sensor according to claim 1 , wherein the condensation trap is designed as an indentation which is arranged along an inner side of the wall of the sensor housing.

7. The process measurement technology sensor according to claim 6 , wherein the sensor housing is locally hardened, including surface-hardened, in the region of the indentation.

8. The process measurement technology sensor according to claim 1 , further comprising:
a humidity sensor,
wherein the condensation trap includes the humidity sensor, or wherein the humidity sensor is arranged adjacent to the condensation trap.

9. The process measurement technology sensor according to claim 1 , further comprising:
a heating unit, wherein the condensation trap has the heating unit, or wherein the heating unit is arranged adjacent to the condensation trap.

10. The process measurement technology sensor according to claim 1 , wherein the electronic measuring equipment and the sensor element are arranged at least 8 mm from the condensation trap.

11. The process measurement technology sensor according to claim 1 , further comprising:
a moisture-binding material, wherein the condensation trap has this material, or wherein this material is arranged adjacent to the condensation trap.

Assignees

• Endress Hauser Conducta Gmbh Co Kg

Inventors

• Oser Julian
• Weber Frank

Classifications

• G01D11/245 Primary

  Housings for sensors · CPC title

• G02B27/0006

  with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation (G02B1/18 takes precedence; cleaning in general B08B) · CPC title

• G01D3/036

  on measuring arrangements themselves · CPC title

• F16T1/48

  Monitoring arrangements for inspecting, e.g. flow of steam and steam condensate · CPC title