Magnetic field and/or gradient measuring device for testing ferro-magnetic material, has sensor unit with magnetometer, and control unit for controlling sensor electronics, where both units are separably connected in non-elastic manner

摘要

The device has a sensor unit with a magnetometer (7) i.e. giant magneto resistive (GMR)-sensor, and a control unit for controlling sensor electronics and signal processing. The sensor unit and the control unit are separably connected with each other in a non-elastic manner. The control unit comprises a micro-controller (10) with an integrated analog to digital (A/D)-converter. A measuring signal that is measured by the sensor unit is amplified by the control unit. The control unit comprises a signaling device (11) for acoustic display i.e. miniature loud speaker, of measuring result.