The principle of ultrasonic wave in the thickness measurement is similar to that of optical wave. The ultrasonic wave pulses transmitted by the probe reach the object to be measured and propagate in the object and when they reach the interfaces, they are reflected back. The thickness of the object is determined by precisely measuring the time the ultrasonic wave travels in the object. To increase accuracy the DELTA is equipped with automatic gain control and Vpath error correction.

The principle of ultrasonic wave in the thickness measurement is similar to that of optical wave. The ultrasonic wave pulses transmitted by the probe reach the object to be measured and propagate in the object and when they reach the interfaces, they are reflected back. The thickness of the object is determined by precisely measuring the time the ultrasonic wave travels in the object. To increase accuracy the DELTA is equipped with automatic gain control and Vpath error correction.