Coating thickness gauges are mainly used in the surface treatment industry to measure the thickness of coatings on metal or plastic surfaces.

Coating thickness gauges are divided into two types: magnetic and eddy current, and there are also two-in-one types. The magnetic thickness gauge is designed to measure the thickness of the coating on magnetic metals such as steel (except for magnetic metals, such as steel and nickel), but the coating on non-magnetic copper, aluminum, tin, etc. cannot be measured. The eddy current thickness gauge is designed to measure the thickness of the insulating layer on non-magnetic metals, such as copper, aluminum, etc. (the coating must be a non-conductive material).

The coating thickness meter using the magnetic method can quickly and accurately non-destructively detect the thickness of various non-magnetic coatings coated on magnetic metal substrates. For example, the chromium-plated layer, copper-plated layer, zinc-plated layer, paint layer, powder sprayed layer, etc. on the surface of steel and nickel materials can all be measured with Fe-based probes.

The coating thickness meter using the eddy current method can quickly, accurately and non-destructively measure the thickness of various non-conductive coatings coated on non-magnetic metal substrates, such as aluminum, copper, brass, stainless steel and other materials. The surface paint layer, powder spray layer, porcelain coating layer, etc., are detected with NFe-based probes.

If the user wants to measure the thickness of the coating, first need to consider whether the substrate is magnetic or non-magnetic, and then select a different test method for testing.

Coating thickness gauges is a typical instrument that uses membrane panel switches as input ports. Because the function is relatively simple, the number of keys on most of the coating thickness gauges will not exceed four. Therefore, the design of the membrane keypad is relatively easy.

According to the experience of JRPanel color engineers, the color selection on the membrane keypad of the related instruments is also relatively uniform, basically gray, black, red and blue. Of course, some manufacturers will use some bold colors, in order to highlight the characteristics of the brand.