Demagnetization devices; mobile, stationary and built-in demagnetization devices, in particular hand-held demagnetization devices, plate-shaped and bar-shaped demagnetization devices, demagnetization tunnels and high-performance demagnetization systems comprised of demagnetizers; demagnetization equipment for demagnetizing ferromagnetic metal objects, in particular permanent magnets, bulk goods, large and small parts, hard metal parts, magnetic data carriers, complex structures, vehicles on l...