... Ultrasonic Thickness Gauge 1,Measurement Range: (0.75 ~ 300) mm (steel) 2,Sound Velocity Range: (1000 ~ 9999) m / s LK300 Ultrasonic Thickness ... , glass fiber and other any good conductors of ultrasonic thickness.2. Can be equipped with different frequencies, different ... (EMI) electromagnetic interference (EMI)the whole with : thickness gauge, probe, alloy case, certificate of inspection, operation instruction ...