Temperature sensor

Patent metadata

Field	Value
Publication number	US-11435236-B2
Application number	US-201716472384-A
Country	US
Kind code	B2
Filing date	Dec 6, 2017
Priority date	Dec 22, 2016
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

Abstract

The present disclosure relates to an apparatus for determining and/or monitoring temperature of a liquid. The apparatus includes at least one temperature sensor arranged in a sensor head. Furthermore, the present disclosure relates to a method for manufacturing the apparatus. At least one internal volume of the sensor head is at least partially filled with at least one first material and at least one second material. The first material serves for affixing at least one component of the temperature sensor within the sensor head, and the second material serves for heat conduction within the sensor head.

First claim

The invention claimed is:

1. An apparatus for determining and/or monitoring temperature of a liquid, including:
at least one temperature sensor arranged in a sensor head;
wherein at least one internal volume of the sensor head is at least partially filled with at least one first material and at least partially with at least one second material;
wherein the first material serves for affixing at least one component of the temperature sensor within the sensor head;
wherein the first material is embodied to stabilize mechanically at least one component of the at least one temperature sensor within the sensor head, and to protect the at least one component against vibrations;
wherein the first material is a ceramic, a magnesium oxide, an aluminum oxide, or a curable ceramic potting compound;
wherein the second material serves for heat conduction within the sensor head; and
wherein the second material is carbon nanotubes.

2. The apparatus of claim 1 , wherein the temperature sensor includes at least one temperature sensitive sensor element and at least one connection wire for contacting the sensor element.

3. The apparatus of claim 2 , wherein the at least one internal volume of the sensor head has at least two subregions, wherein a first subregion of the at least one internal volume is filled with the first material and wherein a second subregion of the at least one internal volume is filled with the second material.

4. The apparatus of claim 3 , wherein the first subregion is arranged at least partially in a region of the at least one connection wire, and wherein the second subregion is arranged at least partially in a region of the at least one temperature sensitive sensor element.

5. The apparatus of claim 1 , wherein the first material is further embodied to provide electrical insulation of the at least one component.

6. The apparatus of claim 1 , wherein the second material has a thermal conductivity λ of λ>100W/(mK) at 0° C.

7. The apparatus of claim 1 , wherein the second material is selected in such a manner that a thermal time constant (τ) for a cube shaped body of the second material with a volume of 1 mm 3 is less than 0.1 s.

8. The apparatus of claim 1 , wherein the at least one internal volume of the sensor head is filled with a mixture including at least the first material and the second material.

9. The apparatus of claim 1 , wherein the sensor head includes a cylindrical lateral surface and a circular floor element.

10. The apparatus of claim 1 , wherein the temperature sensor includes a resistance element or a thermocouple.

11. A method for manufacturing an apparatus for determining and/or monitoring temperature of a liquid, including steps of:
introducing at least one component of a temperature sensor into a sensor head; and
filling an internal volume of the sensor head at least partially with at least one first material and at least partially with at least one second material;
wherein the first material serves for affixing at least one component of the temperature sensor within the sensor head;
wherein the first material is embodied to stabilize mechanically at least one component of the at least one temperature sensor within the sensor head, and to protect the at least one component against vibrations;
wherein the first material is a ceramic, a magnesium oxide, an aluminum oxide, or a curable ceramic potting compound;
wherein the second material serves for heat conduction within the sensor head; and
wherein the second material is carbon nanotubes.

12. The method of claim 11 , wherein at least one internal volume of the sensor head is filled with a mixture including at least the first material and the second material.

13. The method of claim 12 , wherein the first material is filled into a first subregion, and wherein the second material is filled into a second subregion.

Assignees

• Endress Hauser Wetzer Gmbh Co Kg

Inventors

• Saecker Dietmar
• Umkehrer Alfred

Classifications

• G01K1/16 Primary

  Special arrangements for conducting heat from the object to the sensitive element · CPC title

• G01K7/02

  using thermoelectric elements, e.g. thermocouples · CPC title

• G01K7/22

  the element being a non-linear resistance, e.g. thermistor (G01K7/26 takes precedence) · CPC title

• G01K7/16

  using resistive elements · CPC title

• G01K1/08

  Protective devices, e.g. casings · CPC title