AUTOMATION FIELD DEVICE

Abstract

The present disclosure relates to a process automation field device, comprising: a container for receiving and/or conducting a medium, the container having an outer surface; a measuring apparatus for determining a process variable of the medium; electronic components for operating the measuring apparatus; and a housing including a housing body, wherein: the measuring apparatus and the electronic components are disposed in the housing; the housing body is disposed on the outer surface; the housing body comprises a composite material; the measuring apparatus and the electronic components are at least partly surrounded by the composite material; and the composite material comprises a polymer matrix and an additive, which comprises at least one chemical compound including an oxidized transition metal from the fourth group of the periodic table. The present disclosure also relates to a method for producing the field device and to use of the additive to improve adhesion.

Description

Claims

1-15. (canceled)

16. A process automation field device, comprising: a container configured to receive and/or conduct a medium to be measured, wherein the container includes an outer surface;a measuring apparatus configured to determine a process variable of the medium;electronic components configured to operate the measuring apparatus;a housing configured to protect the measuring apparatus and the electronic components, the housing comprising a housing body, the housing body at least partly comprising a composite material, wherein the composite material comprises a polymer matrix and an additive, wherein: the measuring apparatus and the electronic components are disposed in the housing;the housing body is disposed on the outer surface;the measuring apparatus and the electronic components are at least partly surrounded by the composite material; andthe additive comprises at least one chemical compound including an oxidized transition metal.

17. The field device of claim 1, wherein the transition metal of the oxidized transition metal is of the fourth subgroup of the periodic table.

18. The field device of claim 1, wherein the outer surface comprises a polyolefin.

19. The field device of claim 1, wherein the container is a polyethylene tube.

20. The field device of claim 1, wherein the polymer matrix comprises at least one first component and one second component, wherein the first component comprises an isocyanate, and wherein the second component comprises a polyol.

21. The field device of claim 1, wherein the transition metal is at least one of titanium and zirconium.

22. The field device of claim 1, wherein the at least one chemical compound comprises at least one of a titanate and a zirconate.

23. The field device of claim 22, wherein the at least one chemical compound comprises at least one of an isopropyl chain and a tri(dioctyl)phosphate chain.

24. The field device of claim 1, wherein the field device is a magnetic-inductive flow meter.

25. A method for producing a housing for a field device according to claim 1, the method comprising: incorporating the additive into a first component or a second component of the polymer matrix, wherein the first component comprises an isocyanate, and wherein the second component comprises a polyol;mixing the first and second components to form a potting material;pouring the potting material into a potting mold, wherein the potting mold is arranged to at least partially surround the outer surface of the container; andcuring the potting material to form the composite material at a curing temperature, thereby forming the housing body.

26. The method of claim 25, wherein the additive is incorporated into the second component of the potting material.

27. The method of claim 25, wherein the transition metal of the oxidized transition metal is of the fourth subgroup of the periodic table.

28. The method of claim 25, wherein the curing temperature is less than 50° C.

29. The method of claim 25, wherein the curing temperature is less than 30° C.

30. The method of claim 25, wherein the additive is present in the second component in a weight ratio of at least 0.3% and at most 1%.

31. The method of claim 25, wherein the additive is present in the second component in a weight ratio of 0.4 to 0.5%.

32. The method of claim 25, wherein the outer surface is oxidized at a position at which the housing body is formed.

33. The method of claim 25, wherein the transition metal is at least one of titanium and zirconium.

34. The method of claim 25, wherein the additive comprises at least one of a titanate, a zirconate, an isopropyl chain and a tri(dioctyl)phosphate chain.

35. A method for producing a housing for a field device, the method comprising using an additive comprising at least one of a titanate compound and a zirconate compound as to improve adhesion of a housing body of the housing to a container on which the field device is disposed, wherein the housing body is formed of a polyurethane.