Painting Thickness Meter And Its Principle
The painting thickness meter is a type of coating thickness gauge. The painting thickness meter can be used to measure the thickness of the plating layer such as chrome plating, tin plating and zinc plating. So what exactly is the plating layer?
1.Plating layer and its thickness:
Electroplating is actually a process. This process can make the surface of the material bright and beautiful and decorate the material. At the same time, the properties of the material such as electrical conductivity, electromagnetic properties, heat resistance, hardness, wear resistance, brazing properties and other special properties can also be improved. The plating of the metal surface is generally relatively thin compared to other coatings. For example, a galvanized alloy is generally about 8 μm and a copper-nickel-chromium plating layer is generally about 10 μm. Hard chrome is more than 30 microns and chemical nickel is about 20 microns. The most important thing is that the plating layer has anti-oxidation and anti-corrosion functions. A painting thickness gauge is generally used to detect the plating layer thickness.
2.Classification of painting thickness meter:
Electro painting thickness meters can be divided into magnetic induction painting thickness meters, eddy current painting thickness meters and fluorescent X-ray painting thickness meters according to their measurement principles.
1)Magnetic induction principle
The principle of magnetic induction is mainly to determine the thickness of the cover layer by using the size of the flux flowing into the ferromagnetic base through the non-magnet cover. The thicker the cover layer, the larger the magnetic resistance and the smaller the magnetic flux. This measurement principle generally requires a substrate permeability of 500 or more. Today's painting thickness meters have new technologies such as temperature compensation that use magneto resistance to modulate measurement signals. The magnetic principle painting thickness gauge can accurately measure the enamel,paint,porcelain,rubber,plastic non-ferrous metal plating including nickel-chromium and the anti-corrosion coating of chemical oil.
2)Eddy current principle
The eddy current measurement principle is to generate a magnetic field in the probe coil by using a high frequency alternating current signal.A vortex is formed when the side head is close to the tested object.The closer the probe is to the substrate, the greater the eddy current and the reflection impedance. This measurement method is suitable for a cover layer on a non-ferromagnetic metal substrate.The painting thickness meter for this measurement method is suitable for vehicles, home appliances, aluminum alloy doors and windows, plastic coatings, and anodizing.
3)Fluorescent X-ray principle
The X-ray fluorescence principle is mainly that after the X-ray or particle beam is irradiated,the measured object absorbs excess energy and becomes unstable. To become stable from instability, excess energy must be released in the form of fluorescence or light.The principle of fluorescent X-ray is to measure or analyze the intensity of the released fluorescent energy.
3.Shenzhen Linshang painting thickness meter
Shenzhen Linshang Technology's LS220H painting thickness meter uses magnetic induction principle and eddy current principle. The parameters are as follows:
Measurement Range: 0.0 - 2000μm
Resolution: 0.1μm: (0μm - 99.9μm)
1μm: (100μm - 999μm)
0.01mm: (1.00mm - 2.00mm)
Measurement accuracy is: ≤ ± (3% reading + 2μm)
The LS220H painting thickness meter meets the following relevant standards:
1."Determination of film thickness of paints and varnishes DIN EN ISO 2808"
2."Testing Procedures for Magnetic and Eddy Current Cover Thickness Measuring Instruments JJG-818-2005"
3."Measurement of thickness of non-magnetic coating on magnetic substrate - Magnetic method GB/T 4956-2003"
4."Measurement of thickness of non-conductive coating on non-magnetic base metal - eddy current method GB/T 4957-2003"
The Linshang LS220H painting thickness meter has high resolution, accurate measurement accuracy.This meter is simple and compact and easy to carry.It is a good choice for measuring the plating layer thickness.
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