... cast-iron Warranty period: 3 years SV-T101 High-precision ultrasonic thickness gauge Handy, precise, available for testing cast-ironInstrument ... parameters:Adapted to measure the thickness of good conductor for ultrasonic, such as metal (steel, cast iron, aluminum, copper), plastic, ... and auto correcting system errors.Able to measure the ultrasonic velocity in turn if the thickness value is known ...