The meaning of the English letters of the coating thickness gauge
What are the differences between F, N and FN in the 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, N-type coating thickness gauge adopts the principle of eddy current; to measure enamel, rubber, paint, plastic layer, etc. on copper, aluminum, zinc, tin and other substrates with eddy current sensor. 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. Use see above.
Magnetic thickness gauge with one F probe; FN refers to magnetic and eddy current 2-in-1 coating thickness gauge with two probes. Function: Measuring the thickness of non-magnetic coatings on magnetically permeable objects and non-conductive coatings on non-magnetic metal substrates Application: Use magnetic sensors to measure non-ferromagnetic coatings and coatings on ferromagnetic metal substrates such as steel and iron , such as: lacquer, powder, plastic, rubber, synthetic material, phosphating layer, chromium, zinc, lead, aluminum, tin, cadmium, porcelain, enamel, oxide layer, etc. Use eddy current sensors to measure enamel, rubber, paint, plastic layers, etc. on copper, aluminum, zinc, tin, etc. substrates. Widely used in manufacturing, metal processing, chemical industry, commodity inspection and other inspection fields.
Pachymetry category:
It is suitable for measuring the thickness of the non-magnetic layer on the magnetically conductive material. The magnetically conductive material is generally: steel\iron\silver\nickel. This method has high measurement accuracy and eddy current thickness measurement method
Applicable to the thickness measurement of non-conductive layers on conductive metals. This method is less accurate than the magnetic thickness measurement method and the ultrasonic thickness measurement method
At present, there is no such method in China to measure the coating thickness. Some foreign manufacturers have such instruments, which are suitable for the measurement of multi-layer coating thickness or the occasions where the above two methods cannot be measured. But the general price is expensive and the measurement accuracy Not high. Electrolytic thickness measurement method
This method is different from the above three methods. It does not belong to non-destructive testing and needs to destroy the coating. Generally, the accuracy is not high. It is more troublesome to measure than other radiation thickness measurement methods.
