Do magnets affect Zettlex sensors?

Generally, Zettlex inductive position sensors are unaffected by DC magnetic fields because they are AC devices. However, if the magnets are within the sensor’s Near Field then they will tend to distort the Antenna’s field by providing a ‘short route’ for the magnetic flux.

An additional consideration is the rate of change of the fields, be it by an AC field or a DC field flux-cutting the target.

These factors can be accommodated in the design of the sensor by modifying the arrangement of the Transmit and Receive circuits.