Eddy Current Thickness Gauges are non-destructive testing devices used to measure the thickness of conductive materials, such as metals. They operate on the principle of electromagnetic induction, where an alternating current generates an electromagnetic field that induces eddy currents in the material. The strength of these eddy currents is affected by the thickness of the material, allowing for accurate measurements. These gauges are commonly used in various industries, including aerospace, automotive, and manufacturing, to assess the integrity of components without causing damage. They are particularly useful for measuring coatings, such as paint or plating, and can provide quick and reliable results in both field and laboratory settings.