Patent ID: 7204140

Claim:
A radar level measuring device for non-contact measurement of a level of a product in a container having an opening, which device comprises: a flange having a lead-through; the flange being intended for mounting on an upper mounting part of the container in such a way that the lead-through at least partly covers the opening and a contact surface of the flange rests against the upper mounting part of container; and and a waveguide part, insertable into the flange, wherein the insertable waveguide part, when inserted, is arranged to come to a stop at a distance (D) from that surface of the flange which is intended to face the container, wherein the flange further has a part that extends from the surface towards the intended position of the insertable waveguide part, said part extending at least said distance (D), the part forming a waveguide along said distance (D), thus forming a continuous waveguide, together with the insertable waveguide part when said waveguide part is inserted, wherein the insertable waveguide part is removably insertable in the flange; wherein the device is further adapted for receiving different insertable waveguide parts; wherein each of the insertable waveguide parts together with the same flange waveguide forms a continuous waveguide; and wherein each of the insertable waveguide parts are adapted for different frequency bands by having different inner dimensions and different widening parts.