Excellent Timer chips provide fast, accurate readings ;Ultrasonic double crystal probe;Automatic Gain switchable;Two measurement modes: QC Mode/Statistics Mode;Built-in sound velocity of multiple materials.It already contains the velocities of several common metallic (such as iron, copper, aluminum) and non-metallic materials (plastics, ceramics, plexiglass) as well as other objects and the user are not required to find them separately.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 this meter 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..Sound velocity can be measured according to thickness.The tester can reverse the sound velocity of the material based on the known thickness and measurement results. And the instrument can test irregular materials of the same components as the materail whose thickness can be measured.Large measuring range of thickness.With a wide mesuring range of material, the meter can detect materials from as thin as 0.8 mm to 600 mm. Its resolution can reach to 0.001mm when measuring the objects 0.8mm-10mm.Two measurement modes: QC Mode/Statistics Mode.The ultrasonic thickness tester features two measurement mode: QC mode and statistics mode. Allowing to set upper and lower limits to check the problem areas by prompting NG under the QC mode. It will count maximum, minimum and average values of data in Statistics mode.