Detector and locator of ferromagnetic inclusions in a continuously passing environment

The M and M includes a primary excitation coil (A) through which the medium (M) passes and further comprising at least two pick-up coils (B1 to Bn) which are arranged in a plane perpendicular to the primary plane the excitation coil (A). All scanning coils (B1 to Bn) are vinyl in any sense. In the plane of the scanning coils (B1 to Bn), at least one secondary excitation coil is arranged