Patent ID: 9103857
Filing Date: 2015-08-11
Classification: G01N,G01R

Abstract:
1. A gradiometer for determining electrical conductivity of a first medium contained in a containment, wherein the first medium is liquid, wherein a second medium is located outside the containment, wherein said gradiometer is connected with said containment by screwing, adhesive, interlocking, via a tubular nozzle with a flange arrangement, or as part of a retractable assembly, wherein the containment is formed by a containment wall which is composed of a metal or a resistant synthetic material, wherein the containment wall comprises an electrically non-conductive region, said gradiometer comprising: at least a first electrical coil, a second electrical coil and a third electrical coil, wherein said first coil is embodied as a transmitting coil to transmit electromagnetic waves, and wherein said second and said third coils are embodied as receiving coils; and a holding apparatus, wherein: said holding apparatus is arranged in said electrically non-conductive region of said containment wall and said holding apparatus is arranged with its principal axis perpendicular to said containment wall; said first, said second and said third coils are wound on said holding apparatus; said holding apparatus is arranged through a containment opening in a containment wall in such a manner that said first coil is positioned centrally with respect to said containment wall; said second and said third coils are arranged mirror symmetrically to said first coil and are inductively coupled with said first coil, and said second coil is arranged outside the first medium and the third coil is arranged in the first medium, wherein said electromagnetic waves couple via the first medium in the containment and the second medium outside the containment wherein a different voltage is induced in the third coil than in the second coil due to different electrical properties of the first and second medium; and the electrical conductivity of said first medium is ascertained based on said different voltage.