... Measurement MethodsApplications OccasionSuch as F-typeMagnetic inductionMeasure the thickness of Non-magnetic coating layers on magnetic substrate.Such as: ( ... on steel,iron,alloy and hard-magnetic steel. Conductive or non-conductive coating layer is unimportant, as along as it is ... materials,anodic-oxide layer on copper,aluminum,zinc,tin,non-magnetic stainless steel,gold and silver. Cover layer only ...