Cygnus Instruments offers two dedicated ROV mountable thickness gauges. The units have been designed to be mounted onto most types of work class ROV with a manipulator facility. The shallow water version (Cygnus ROV 1000) is pressure tested to 1000 m. The deep water version is pressure tested to 3000 m (Cygnus ROV 3000). Dedicated software displays the time, date and thickness readings on the surface. All readings can be stored.

Features

• Shallow water version pressure tested to 1000 m (3,300 ft).
• Deep water version pressure tested to 3000 m (10,000 ft).
• 16 ft (5 m) of probe cable for routing around most ROV's.
• Power taken from ROV.
• Only one twisted pair required to transfer data to surface.
• Probe does not need to touch surface under test -- measurements can be taken through 5 mm of water.
• Readings not influenced by the probe orientation.
• Dedicated software for displaying measured results, storing measurements and calibrating gauge.

Cygnus Multiple Echo Technology

With multiple echo technology, readings are taken by measuring the time delay between any three consecutive backwall echoes. The time T1 (for coating thickness) is ignored. The times T2 and T3 are equal to the time that it takes for sound to travel through the metal. Only by looking at three echoes can the measurements be made for the metal thickness, where T2 = T3.