high accuracy, excellent reliability, no moving parts, no need to set parameters, can be installed at any angle TM-8810Measuring range (metric/imperial): 1.5-200mm,0.06-8inchOperating principle: ULTROSONICMaterials measured: only 11 types of materials, including steel, cast iron, aluminum, red copper, brass, zinc, quartz glass, polyethylene, PVC, gray cast iron, nodular cast ironLower limit steel ...