... iron, nodular cast iron and other ultrasonic wave well-conductive materials. Dual probe extended your measure range to every possible ... life. Function1. Applicable to measure the thickness of any hard materials, e.g. steel, castiron, aluminum, red copper, brass ... ±(0.5%Thickness+0.04)mm, depends on materials and conditionsUnitsMetric/Imperial unit selectableMetric/English unit selectable.Working ...