Coating thickness gauges measure layer thickness on coated surfaces precisely. They include magnetic-induction, eddy-current, ultrasonic and mechanical gauges. These tools test paint, enamel, powder, plating or protective coatings on metal and non-metal substrates. Non-destructive measurement ensures coating quality and uniformity. Wide measuring ranges suit thin films and thick protective layers alike. Users can compare gauge types and select those matching their coating and substrate needs.