Eddy current and magnetic paint thickness meter

The covering layer formed on the surface protection and decoration of the material, such as coating, plating, sticking, etc., is called the covering layer in the relevant national and international standards. Measuring the thickness of the coating is an important part in the quality inspection of the processing industry and surface engineering, and it is a test instrument for the material to achieve excellent quality standards.The most commonly used method on the market is the non-destructive testing method, which is the coating thickness gauge made by the magnetic method and the eddy current method. It is not only applicable in a wide range, but also easy to operate. It is the most widely used thickness measuring instrument in industry and scientific research. During the measurement, neither the coating nor the substrate is damaged, and the measurement speed is fast, which can make a large amount of inspection work cost-effective. Linshang paint thickness meter LS221 is a dual-purpose coating thickness gauge that uses the principles of magnetic induction and eddy current measurement. It can measure the thickness of the non-magnetic coating on the magnetic substrate and the thickness of the non-conductive coating on the non-magnetic substrate.1. The principle of magnetic induction measurementWhen the probe is in contact with the cover layer, the probe and the magnetic metal substrate form a closed magnetic circuit. Due to the presence of the non-magnetic cover layer, the magnetic resistance of the magnetic circuit will change. According to the change, the thickness of the coating can be measured. .2. The principle of eddy current measurementThe electromagnetic field generated by the high-frequency alternating current in the coil is used. When the probe touches the cover layer, an eddy current is generated on the metal substrate. And the feedback effect will be generated on the coil in the probe, and then the thickness of the cover layer is derived by measuring the size of the feedback effect.
Measurement parameters of LS221 paint thickness meter

Probe tip Ruby fixedMeasuring principle Fe: Hall effect/NFe: Eddy current effectProbe type External connection typeMeasuring range 0.0-2000μmResolution0.1μm: (0μm-99.9μm)1μm: (100μm-999μm)0.01mm: (1.00mm-2.00mm)
Measurement accuracy ≤±(3% reading+2μm)Unit μm / milMeasurement interval 0.5s