Patent ID: 7540202
Filing Date: 2009-06-02
Classification: G01F

Abstract:
1. An apparatus for measuring flow of a medium flowing through a measuring tube directed along a longitudinal axis of the measuring tube, comprising: an electric motor; a control/evaluation unit; at least one measuring device; a flow measuring arrangement; and a magnet arrangement, which produces an alternating magnetic field at a first location and at a second location, wherein: a magnetic field (φ associated with the measuring tube is at least one measuring electrode in which a measuring current is induced, dependent on flow of the medium; a magnetic field at said second location of said two locations is so developed, that it drives said electric motor; said at least one measuring arrangement registers at least one variable for controlling said magnet arrangement, as required for operating said electric motor and said flow measuring arrangement; and said control/evaluation unit delivers, on the basis of the measuring voltage induced in said measuring electrodes, information concerning volume flow of the medium in the measuring tube.