Magnetic field sensitive proximity sensor has separate coupling element acted upon by magnetic detection field and coupled to oscillator; inductive coupling is affected by detection field

摘要

The device has an inductive proximity sensor (12) with an oscillator that is constant in a magnetic field, whereby the inductive sensor is designed so that at least in a certain distance range a metal object influences the oscillator amplitude by inductive coupling, and a separate coupling element (38) acted upon by a magnetic detection field and coupled to the oscillator, whereby the inductive coupling is affected by the detection field.