... ), 3~50mm(Gray Iron) HIGH ACCURACY ULTRASONIC THICKNESS GAUGEThe ultrasonic thickness gauge Model SW6 series are featured as cost- ... iron, aluminum, red copper, zinc, quartz glass, polyethylene, PVC, gray cast iron and nodular cast iron. Thickness measurements are made from ... 4~80mm(High temperature), 3~50mm(Gray Iron)Notes: Thickness range depends on material transducer type, surface condition and ...