Coating thickness gauges are instruments used to measure the thickness of coatings, such as paint, varnish, or powder, applied to various surfaces. These gauges help ensure that the coating is applied evenly and meets industry standards, which is crucial for durability and performance. There are two main types of coating thickness gauges: magnetic and eddy current. Magnetic gauges are used for ferrous surfaces, while eddy current gauges are suitable for non-ferrous materials. Both types provide quick and accurate measurements, making them essential tools in industries like automotive, aerospace, and manufacturing.