Classification of coating thickness measurement gauge (2)

The high frequency AC signal generates an electromagnetic field in the probe coil, and a vortex is formed therein when the probe is close to the conductor. The closer the probe is to the conductive to substrate, the larger the eddy current and the greater the reflection impedance. This feedback action characterizes the distance between the probe and the conductive substrate, that is, the thickness of the non-conductive coating on the conductive substrate. Since such probes are specifically designed to measure the thickness of a coating on a non-ferromagnetic metal substrate, they are often referred to as non-magnetic probes. Non-magnetic probes use high-frequency materials for coil cores, such as platinum-nickel alloys or other new materials. Compared with the principle of magnetic induction, the main difference is that the probes are different, the frequency of the signals is different, and the signal size and scale are different. Like the magnetic induction thickness gauge, the eddy current thickness gauge achieves a resolution of 0.1um, a tolerance of 1%, and a high range of 10mm.

Magnetic induction coating thickness gauge is using the principle of eddy currents can in principle be measured on non-conductor coatings, such as aerospace aircraft surfaces, vehicles, appliances, aluminum alloy doors and windows and other aluminum surface paints, plastic coatings and anodized film. The cladding material has a certain conductivity and can also be measured by calibration, but requires a conductivity difference of at least 3-5 times (such as chrome plating on copper). Although the steel substrate is also an electrical conductor, such tasks are more suitably measures by using magnetic principles.

Instruments' own research and development of coating thickness gauges can be equipped with magnetic or eddy current probes. It can measure coating thickness quickly without damage and precision; it can be used in the laboratory or on the engineering site.

The unique four-channel design allows each channel to store the zero value of a material, which is greatly convenient for customers. The probe is made of precision metal parts to ensure the life of the probe is more than ten years. The life can also be more than two years) and the test accuracy; the split coating is 360 degrees without dead angle omnidirectional measurement. The split probe makes it easier to operate on the workpiece. Some narrow special places that can not be measured by the integrated coating thickness measurement gauge, the split can be well satisfied. The one-portable and compact design is the unanimous favorite of our customers. Zero calibration and two-point calibration can be performed, and the system error of the probe can be corrected by the basic calibration method to ensure the measurement accuracy of the probe to the utmost. As well as the unique continuous measurement method (CONTINUE) and single measurement method (SINGLE), it also caters to the different needs of users .

Introduction to Oxford Coating Gauge:

Oxfordsurface coating thickness measurement applied the latest phase-based eddy current technology to the OXFORD to achieve an accuracy of ±3% (compared to standard) and an accuracy of less than 0.3%. Oxford Instruments' unique application of eddy current technology minimizes substrate effects, which is making measurement accurate and unaffected by part geometry. In addition, the instrument generally does not require calibration on an iron substrate. Designed for difficult-to-measure metal cladding, the ECP-M probe measures almost all metal coatings on iron substrates such as zinc, nickel, copper, chromium and cadmium. Smaller probes provide the convenient measurements for very small, specially shaped or rough surfaces.