The thickness gauge is a device used to measure the thickness of the coating or film on the surface of the sample. The specific measurement methods are as follows:
Magnetic thickness measurement method: suitable for magnetic permeability Measurement of non-magnetic coating thickness on materials, such as coating or film thickness on steel, copper, aluminum and other metal materials. The measurement principle is to use a magnetic sensor to measure changes in the magnetic field on the surface of the sample to determine the thickness of the coating or film.
Eddy current thickness measurement method: suitable for measuring the thickness of non-conductive coatings on conductive metals, such as coating or film thickness on aluminum, copper and other metal materials. The measurement principle is to use an eddy current sensor to generate eddy currents, and calculate the thickness of the coating or film by measuring the interaction between the eddy currents and the sample surface coating or film.
Ultrasonic thickness measurement method: suitable for measuring the thickness of multi-layer coatings. The measurement principle is to use the reflection and propagation characteristics of ultrasonic waves in the surface coating or film of the sample to determine the thickness of the coating or film by measuring the reflection time and propagation speed of the ultrasonic waves.
X-ray fluorescence thickness measurement method: suitable for measuring the thickness of coatings on metal materials. The measurement principle is to use the principle of X-ray fluorescence to calculate the thickness of the coating by measuring the fluorescence response of the coating on the sample surface to X-rays.
Electrochemical thickness measurement method: suitable for coating thickness measurement on metal materials, such as galvanizing, chromium plating, etc. The measurement principle is to use electrolysis or electrochemical methods to determine the thickness of the coating by measuring the electrode reaction between the coating and the metal substrate.
Optical thickness measurement method: suitable for thickness measurement of transparent materials or non-metallic materials with high reflectivity, such as glass, plastic, etc. The measurement principle is to use the principle of optical interference or reflection to determine the thickness of the coating or film by measuring the interference and reflection characteristics of light in the surface coating or film of the sample.
The above are several common measurement methods for coating thickness gauges. According to different application requirements and material characteristics, it is necessary to select appropriate measurement methods and instruments to measure coating thickness.