Abstract: The present invention relates to a radar level measuring device for non-contact measurement of a level of a product in a container. The device comprises a flange which is mounted on the container in such a way that a lead-through of the flange at least partly covers an opening in the container. The device further comprises a waveguide part, insertable into the flange. When inserted, the insertable waveguide part is arranged to come to a stop at a distance (D) from the surface of the flange intended to face the container, along which distance (D), a waveguide is formed, forming a continuous waveguide together with the insertable waveguide part when inserted.

Abstract: The present invention relates to a device in a level gauging system comprising an antenna using radar waves to gauge a level of a surface of a fluid kept in a container. The antenna is arranged above the fluid surface and comprises a plane surface facing the fluid surface and being substantially parallel with the fluid surface. The plane surface has means for transmitting radar waves towards the fluid surface and means for receiving reflected radar waves from the fluid surface in order to gauge the fluid level. The antenna comprises a radome which at least partially covers the plane surface and is shaped such that condensed fluid is directed away from the antenna by force of gravity. A thermally insulating filling material is provided between the radome and the plane surface.