Pot Cores

Pot cores are used for inductors with low stray fields. The pot core coil generally consists of a coil former with one or two sections, the pot core halves made of soft magnetic, low-loss and usually high perm materials, the mounting plate and the retaining clamps. Pot core coils can be supplied with defined shearing, the predetermined AL values for the individual materials and pot core geometries being achieved by grinding a defined air gap into the center leg of the pot core halves.

For producing frequency-selective components, materials of different initial permeability, low losses and high thermal and temporal stability are used.

Main applications:

  • Telecommunications
  • Measurement and control engineering
  • Current transformers, power transformers (large pot core coils)
  • Automation technology


Another important area of application for pot ores are proximity sensors.

From a physical point of view, the defined mistuning of LC-resonators in inductive sensors is used to obtain information for controlling industrial processes. Mistuning can be achieved by inserting electrically conductive or magnetic material into a high-frequency electric field.

The advantages of inductive sensors are:

  • very high operating reliability
  • their robustness against dirt
  • high operating frequencies possible
  • large usable temperature range