The difference between F, N and FN in coating thickness gauge
F stands for ferrous ferromagnetic substrate. The F-type coating thickness gauge uses the principle of electromagnetic induction to measure non-ferromagnetic coatings and coatings on ferromagnetic metal substrates such as steel and iron, such as: paint, powder, plastic, rubber , synthetic materials, phosphating layer, chromium, zinc, lead, aluminum, tin, cadmium, porcelain, enamel, oxide layer, etc.
N stands for Non-ferrous non-ferrous substrate, and N-type coating thickness gauge adopts the principle of eddy current; to measure the enamel, rubber, paint, plastic layer, etc. on copper, aluminum, zinc, tin and other substrates with eddy current sensors.
The FN type coating thickness gauge adopts both the principle of electromagnetic induction and the principle of eddy current. It is a two-in-one coating thickness gauge of F type and N type.
