Specifically designed for divers undertaking ultrasonic thickness measurement (UTM) of underwater structures. The Cygnus Underwater diver-held ultrasonic thickness gauge has been built to withstand harsh subsea environments while providing quick and accurate metal thickness measurements through coatings or heavy corrosion. This diver-held thickness gauge is simple to operate using 3 function keys, an intuitive menu and a large LCD display – highly visible, even in low-visibility waters.