Abstract: The invention relates to a measuring apparatus comprising a sensing head (15) for determining the position of a primary part (27) on a secondary part. The sensing head (15) is fixedly connected to a primary part (27) or is integrated therein while the primary part (27) and the secondary part form a linear motor (30). Furthermore, the secondary part is embodied as a rack (16) which is provided at least with ferromagnetic material and preferably equidistant teeth (18) in a preferred direction (13), said teeth (18) containing at least ferromagnetic material. The sensing head (15) can be moved in the preferred direction (13) and opposite thereto. An air gap is located between the sensing head (15) and the rack (16) while the sensing head (15) is equipped with at least one sensor (1-12, 19, 31), by means of which magnetic fields can be measured in order to determine a position.

Abstract: A rotary motion detector includes an electrically conducting induction element formed essentially as a hollow cylinder and rotatable about a rotation axis. An excitation assembly applies an inhomogeneous magnetic field and induces an eddy current in the induction element, when the induction element rotates about the rotation axis. A sensor assembly detects a measurement signal that depends on the eddy current. The excitation assembly and the sensor assembly are both arranged radially inside the induction element.

Abstract: A transmitter system for a Ferraris motion transmitter, includes a magnetic measuring arrangement including at least one magnetic field generator for generating a magnetic field and an electrically conductive measuring body, with the magnetic field generator and the measuring body movable relative to one another in operation. Coupled to the magnetic measuring arrangement is a magnetic field sensor for providing an output signal commensurate with a velocity or acceleration of the measuring body. At least one of the magnetic field generator and the magnetic field sensor includes at least two magnetic members interlocking one another in concentric relationship to the measuring body for guiding the magnetic field as a result of eddy currents forming during operation.

Abstract: A transmitter system for a Ferraris motion transmitter, includes a magnetic measuring arrangement including at least one magnetic field generator for generating a magnetic field and an electrically conductive measuring body, with the magnetic field generator and the measuring body movable relative to one another in operation. Coupled to the magnetic measuring arrangement is a magnetic field sensor for providing an output signal commensurate with a velocity or acceleration of the measuring body. At least one of the magnetic field generator and the magnetic field sensor includes at least two magnetic members interlocking one another in concentric relationship to the measuring body for guiding the magnetic field as a result of eddy currents forming during operation.