... Ultrasonic Thickness Gauge 1,Measurement Range: (0.75 ~ 300) mm (steel) 2,Sound Velocity Range: (1000 ~ 9999) m / s LK300 Ultrasonic Thickness Gauge1. Suitable for measuring ... metal (such as steel, cast iron, aluminum, copper, etc.), plastic, ceramic, glass, glass fiber and other any good conductors of ultrasonic thickness ... EMI)the whole with : thickness gauge, probe, alloy case, certificate ...