A field sensor (1) comprising means for measuring a magnetic field and an electric field, wherein at least six capacitor plates (5, 6, 7, 15, 16, 17, 25, 26, 27, 35, 36, 37)are provided which are arranged in a cube and in that in the space thus formed the means for measuring the magnetic field is provided,...http://www.google.de/patents/US6242911?utm_source=gb-gplus-sharePatent US6242911 - Field sensor and device and process for measuring electric and/or magnetic fields
