Fastening device for filling liquid level meter

The invention relates to a fastening device (1) for fixing a radar-based filling level gauge (5) to an outer grille (22) of an IBC tank. For this purpose, the device comprises the following components: a clamping holder (11) which can be clamped to the grid bars of the outer grid (22); the invention relates to a filling material (2) for filling a liquid level meter (5), comprising a filling material (2) and an adapter (12), which has a first fastening means (121, 121 '), by means of which the filling material (2) can be detachably mounted on the adapter (12), and which adapter (12) has a cut-out (122), through which radar signals (SHF, RHF) of the filling material (2) can be transmitted in the mounted state. Furthermore, the device comprises a second fastening means (13), by means of which the filling level gauge (1) can be indirectly fastened to the clamping holder (11). According to the invention, the outer grille (22) is thus used to fasten the filling level gauge (5) to the container (2). As a result, the