The Principle of Magnetic Paint Thickness Gauge
The magnetic paint thickness gauge is to measure the thickness of the coating by using the size of the magnetic flux flowing from the probe through the non-ferromagnetic coating into the ferromagnetic matrix. It is also possible to measure the magnitude of the reluctance corresponding thereto to indicate the thickness of the coating. The thicker the coating, the larger the magnetic resistance and the smaller the magnetic flux. The magnetic paint thickness gauge uses the principle of electromagnetic induction and is suitable for measuring the thickness of non-magnetic coating on various magnetic metal substrates. It can be used to measure the paint layer on steel surface, porcelain, enamel protective layer, plastic, rubber coating, galvanizing, chrome plating and other anti-corrosion coatings.
The principle of magnetic induction is to measure the thickness of the coating by using the magnetic flux of the probe flowing through the non-ferromagnetic cladding and flowing into the iron substrate. The thickness of the coating is thicker, the smaller the measurement is, and then the coating thickness is obtained by processing. When the probe around the coil on the soft iron core is placed on the object to be tested, the servo labeling machine automatically outputs the test current. The magnitude of the magnetic flux affects the magnitude of the induced electromotive force. The instrument amplifies the signal and then indicates the thickness of the coating. Because it is an electronic instrument, it is easy to calibrate, can perform a variety of functions, expand the range, improve the accuracy, and because the test conditions can be reduced a lot, it is more extensive than the magnetic suction application field.
The paint thickness gauge developed by the electromagnetic principle, the horizontal labeling machine applies in principle to all non-magnetic permeability coating measurements, generally riring a basic permeability of more than 500. If the cladding material is also magnetic, it is required to have a sufficiently large difference from the magnetic permeability of the substrate (such as nickel plating on steel). The magnetic principle paint thickness gauge can be applied to the paint coating, porcelain, enamel protective layer, plastic, thin layer chromatography rubber coating, various non-ferrous metal plating including nickel chrome, chemical industry. Various anti-corrosion coatings for the petroleum industry. For film production industries such as photographic film, capacitor paper, plastics, and polyester, measurement platforms or rolls (manufactured by steel) can also be used to achieve measurement at any point on a large area. Therefore, the thickness of the surface coating of the work piece is now measured using a magneto-sensitive paint thickness gauge.
The working principle of the magnetic paint thickness gauge has been introduced. Through the above explanation, hope you will understand the working principle of them.
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