| 摘要 |
<p>The magnetic testing apparatus has a magnet (10) enclosed between two disks (9). The magnetizable disks (9) form polar parts (9") between which are arranged sensors (11) in the area of the magnet (10). These have a sensitivity in the axial direction between the poles and the polar parts. The signals emitted by the sensors are provided through an amplifier to an optical or acoustical signal emitter. </p> |
