Generally, a metal exclusion zone is required in the gap between the sensor Target and Antenna.
In principle, a metal shield may be inserted between these components however the skin depth through which the excitation signals can permeate limits the thickness of the metal shield. The lower the excitation frequency, the greater the thickness of permissible metal. The maximum thickness of metal depends on the actual metal. If a metal shield is to be used then non-magnetic stainless steel is most preferred with aluminum, steel, copper, or brass least preferred. Practically, metal thicknesses of <1.6mm would be necessary.
Please note that resolution and accuracy would be limited in such an arrangement.< Back to FAQs