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The Cygnus 4 ultrasonic thickness gauge is small, tough and accurate. Designed for the toughest operating conditions with a simple to use keypad and intuitive menus and a colour LCD display which can be viewed in all lighting conditions, the Cygnus 4 is ideal for NDT. The Cygnus Multiple-Echo, single crystal probe, technology means you can measure through thick coatings and only the remaining metal thickness is displayed.