Interpretation of some common letters and symbols of coating thickness gauge
The coating thickness gauge can non-destructively measure the thickness of non-magnetic coatings (such as aluminum, chromium, copper, enamel, rubber, paint, etc.) on magnetic metal substrates (such as steel, iron, alloy and hard magnetic steel, etc.) The thickness of a non-conductive coating (such as enamel, rubber, paint, plastic, etc.) on a substrate (such as copper, aluminum, zinc, tin, etc.).
Usually what we call an ultrasonic thickness gauge is only one type of thickness gauge, and the second type of ultrasonic thickness gauge is often referred to by many people as a coating thickness gauge, because only the thickness measurement range of the coating is in μm To measure, that is, the measurement range of the coating thickness gauge is 0-1500μm. For the coating thickness gauge, it is not only the ultrasonic measurement method, but also the coating thickness gauge of the magnetic thickness measurement method, the coating thickness gauge of the eddy current thickness measurement method, and the Cangzhou Oupu coating method of the radiation thickness measurement method. layer thickness gauge etc.
Therefore, the best expression for the coating thickness gauge using the ultrasonic thickness measurement method should be the ultrasonic coating thickness gauge, and the name of the ultrasonic thickness gauge whose measurement is in mm can remain unchanged. However, ultrasonic thickness gauges produced by some manufacturers can switch between the above two measurement range modes. Therefore, the coating thickness gauge and the ultrasonic thickness gauge are two types of thickness gauges that are both different and related.
What do the characters F, N and FN appearing in the coating thickness gauge mean?
F stands for (ferrous) ferromagnetic substrate. The F-type coating thickness gauge adopts 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 substrates. N-type coating thickness gauges use eddy current principles to measure enamel, rubber, paint, and plastic layers on copper, aluminum, zinc, tin and other substrates with eddy current sensors. wait.
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.
