Cygnus ROV Mountable

Ultrasonic Thickness Gauge

Specifically designed to be mounted on to larger work class remotely operated vehicles, this subsea ROV mountable ultrasonic thickness gauge is depth rated to 500 meters (1,640 ft). This gauge is versatile and designed to measure metal thickness in the harshest subsea operating conditions - without the need to remove coatings.

Specifically designed for underwater remotely operated vehicles, Cygnus offers a dedicated ROV mountable thickness gauge, ROV MK5 UTG Kit (depth rated to 500 meters). This gauge is versatile and designed to measure metal thickness in the harshest subsea operating conditions – without the need to remove coatings. Ideal for UWILD or IWS class surveys, subsea inspection, repair and maintenance (IRM) of infrastructure, underwater equipment.

Key Features:

  • Multiple-Echo mode for accurate, through-coat measurements as specified by Classification Societies
  • Supplied with CygLink software to display and process measurements on a computer at the surface
  • Selectable Deep-Coat mode ignoring coatings up to 20mm thick
  • Fitted with a safety Pressure Relief Valve and Securing Eye
  • Easy calibration at the surface via CygLink software or TopSide Repeater (TSR) unit
  • Removable end plate for full serviceability
  • Wet mateable ‘MC’ style underwater connectors
  • Optional Topside Repeater (TSR) unit allowing readings to be displayed remotely and superimposed onto ROV’s camera screen
  • Optional purpose-built ROV probe handlers for optimal alignment.
MaterialsVelocities between 2,000 and 7,000 m/s (0.0800 and 0.2780 in/microsec)
Measurement Range in Steel1 – 250 mm (0.040 – 10 inch) depending on selected probe and configuration, material and temperature
Accuracy±0.1 mm (±0.004 inch) or 0.1% of thickness measurement, whichever is greatest, when calibrated in accordance with Cygnus Instruments calibration procedure
Resolution0.1 or 0.05 mm (selectable) (0.005 or 0.002 inch)
Probe OptionsSingle crystal probes
Power7.0 – 30 V DC @ 150 mA (max)
Size127 x 90 mm (5 x 3.5 inch)
Weight in Air900 g (2 lb)
Operating Temp.-10°C to +50°C (14°F to 122°F)
TestingDepth rated to 500 meters (1,640 ft)
CommunicationRS-422, Simplex Single Pair or RS-232 TXD 2400 or 9600 Baud (selectable via DIP switches)
StandardsDesigned for EN 15317
ComplianceCE, UKCA, RoHS
Warranty3 years on gauge and 6 months on probe
Weight5 kg

Cygnus ROV Mountable Gauge Standard Kit – 2K Model – WITHOUT PROBE

Engineered Probe Handling Solutions

Constructed from 316 stainless steel throughout, the W1 probe handler can be held by a manipulator arm and is ideal for use on Work Class ROVs. The Cygnus S1 and G1 Probe Handlers are developed for use on inspection, observation or light work-class ROVs.

Topside Repeater Remote Display Unit

The Cygnus Topside Repeater is a remote display unit connected to the gauge with an umbilical cable. It displays the thickness measurements at the surface in real-time during the survey.

Topside Repeater with Video Overlay

The Topside Repeater can also overlay the real-time thickness measurements on to a composite video signal, displaying it on the survey monitor screen. It will also then be recorded (if there is a video of the survey), showing exact locations and the thickness measurement for future reference.

2 reviews for Cygnus ROV Mountable

James M.

May 16, 2015 1:03 PM

This is to testify that over the last 23 years of working offshore I have come across Cygnus instruments both as a Diver and as an ROV supervisor.

As a diver I held a CSWIP 3.2u Subsea inspection qualification for 10 years.
During the last 13 years I have had occasion to be involved with the ROV mountable systems on two occasions. In both instances the probe and Subsea housing were fitted to work class vehicles. The systems were able to take UT readings to client satisfaction.

On one setup we attached the probe to a 7 function manip (T3) which gave us extra options whilst trying to take readings on non vertical or variable angled faces.
The system is designed to ensure that it will only display correct readings. In other words you either get a correct reading or no reading at all.
Reading through hard marine growth is not practical. Reading through soft marine growth or protective coatings presents no real issues.
From operational experience am aware that all readings eliminate the coating thickness so only the true metal thickness is displayed.

Should I need to specify an Ultrasonic digital thickness gauge for Subsea ROV use I would choose either the Cygnus -1000m* or the -3000m* ROV mountable gauge depending on operational depth.
The -3000m* unit of course will work shallow or deep, so is probably a better all round option for future project use.

*1000m and 3000m are previous models. Available now is the 2000m model.

George G.

Nov 04, 2020 1:01 PM

I have used Cygnus UT systems for many years and to me they deliver what’s required for quick and reliable results. As we move even more towards ROV based operations, having a cost-effective wall thickness capability is a key component in our service offering- and Cygnus does just that!

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