An Eddy Current Thickness Gauge is a non-destructive testing device used to measure the thickness of conductive materials, such as metals. It operates on the principle of electromagnetic induction, where an alternating current generates eddy currents in the material. The gauge then measures the changes in these currents to determine the thickness of the material without causing any damage. These gauges are commonly used in various industries, including aerospace, automotive, and manufacturing, to ensure the integrity of components. They are particularly useful for measuring coatings, such as paint or plating, on metal surfaces, helping to maintain quality control and safety standards.