The invention relates to a filling level indicator, comprising a retainer (1), a bow (5) rotatably supported on the retainer and having a lever arm fastened thereto, a float fastened to the lever arm, a filling level sensor (2) arranged in the retainer (1), wherein the filling level sensor (2) has a substrate (4), a resistance network arranged thereon, a contact spring structure, and a cover connected to the substrate, which cover covers the resistance network and the contact spring structure, a magnet, which is connected to the bow (5) or the lever arm and acts on the contact spring structure in such a way that an electrical signal corresponding to the filling level can be generated according to the pivoting range.; The bow has a mount (12) for the magnet, wherein the mount (2) has a wall thickness that can be penetrated by the magnetic field of the magnet, and so metal particles are held on the outside of the mount (12) by the magnetic field of the magnet.