Thickness gauges

摘要

Cygnus Instruments Ltd is world renowned for manufacturing and supplying high-quality, accurate ultrasonic inspection equipment, including thickness gauges and leak detectors. Cygnus thickness gauges use the digital multiple echo technique, which is recommended and endorsed by the world's leading classification societies, for remaining metal thickness checks through protective coatings. The technique, in conjunction with a single-crystal probe, ensures a straight beam passage of sound and looks at three returning echoes. The first echo is ignored as it contains the coating thickness, while the second and third echoes represent the time taken to travel through just the metal.