The present disclosure discloses a connection element comprising an essentially cylindrical core, a primary coil for transmission and reception of data and/or for transmission of energy from or to a secondary coil, wherein the primary coil surrounds the core, and a first coupling body with a first segment and a second segment, wherein the second segment comprises the primary coil. In the connection element, the core at one end comprises a first magnetic body that is greater in diameter than the core and extends into the first segment. The present disclosure likewise discloses a sensor, as well as a sensor connection element including such a sensor and such a connection element.
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