Diffusion impervious zone separating wall element, has contactless fillup level in container consisting of a non metallic passage permeable for measurement signal surrounded by metal jacket

摘要

The diffusion impervious and zone separating wall element has contactless fillup level in a container consisting of a non metallic passage permeable for measurement signal is surrounded by a metal jacket. The material of the passage has a higher melting temperature than metal of the jacket. The metal jacket has a higher thermal expansion coefficient that the material of the passage. An Independent claim is included for a method for producing a diffusion impervious and zone separating wall element.