Marmonix thickness testers measure material and coating thickness non-destructively — ultrasonic and coating gauges for metal, plastic, and protective layers.Thickness Gauges & TestersMarmonix thickness testers help inspectors and engineers verify wall thickness, detect corrosion, and check coating layers without damaging the part. Ultrasonic thickness gauges measure metals, plastics, and glass through a single surface, while coating thickness gauges check paint and plating on steel and non-ferrous metals. With high accuracy, easy calibration, and clear digital readouts, they support QA, corrosion monitoring, and inspection.