LS211 Ultrasonic thickness tester measures the wall thickness of metallic (cast iron, steel and aluminum) and non-metallic (ceramics, plastics and glass) substrates and any other ultrasonic wave-conductor using ultrasonic technology. The measuring range of the thickness of LS211 is 0.8mm-600mm and ideal for measuring the effects of corrosion or erosion on tanks, pipes, or any structure where access is limited to one side.