A Coating Thickness Gauge is a device used to measure the thickness of coatings, such as paint, varnish, or powder, applied to various surfaces. It helps ensure that the coating meets specified standards for durability and performance. These gauges can be used on different materials, including metals and plastics, and are essential in industries like automotive, aerospace, and manufacturing. There are two main types of coating thickness gauges: magnetic and eddy current. The magnetic type is suitable for measuring coatings on ferrous metals, while the eddy current type is used for non-ferrous metals. Both types provide quick and accurate measurements, making them valuable tools for quality control.