The Cygnus Mini ROV Mountable UT Meter is a compact subsea ultrasonic thickness gauge designed for accurate underwater corrosion assessment.
Built to mount directly onto small inspection ROVs, it allows operators to measure remaining metal thickness without removing coatings or marine growth. This makes it an efficient solution for routine underwater inspections where speed, safety, and minimal surface disruption are critical.
Ideal for UWILD surveys, offshore inspections, and marine infrastructure assessments, the Cygnus Mini supports non-destructive testing across ship hulls, platforms, pipelines, bridges, and other submerged assets.
By enabling thickness measurements in confined or hard-to-reach areas, it reduces the need for divers or dry docking while streamlining subsea inspection, repair, and maintenance (IRM) operations.
Equipment Type: UTG
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When steel lives underwater, corrosion is not a matter of if — it’s a matter of how bad. Ship hulls thin out. Pilings slowly weaken. Offshore structures take a beating from saltwater every single day.
The problem? You can’t fix what you can’t measure. And getting accurate thickness readings underwater has traditionally meant sending down divers, pulling assets out of service, or scraping away coatings just to see what’s going on beneath the surface.
That’s where the Cygnus Mini ROV Mountable UT Meter changes the game. Mounted to a small inspection ROV, it lets you check metal thickness in tight, hard-to-reach areas without drydocking, without unnecessary downtime, and without stripping protective coatings.
In simple terms, it helps you see how much steel you have left, quickly, safely, and cost-effectively — so you can make smart maintenance decisions before small corrosion problems turn into expensive failures.
The Cygnus Mini ROV Mountable UT Meter combines Cygnus-pioneered Multiple-Echo technology with a powerful Topside Repeater (TSR) video overlay system to deliver accurate, traceable underwater thickness measurements.
Using three return echoes to verify each reading, the Multiple-Echo technique allows inspectors to measure metal thickness directly through protective coatings and soft marine growth without surface preparation.
This eliminates costly scraping and recoating while ensuring error-checked, reliable data in corrosive subsea environments.
Paired with the TSR, thickness readings can be superimposed directly onto the ROV’s live video feed, permanently linking each measurement to its exact inspection location.
The result is streamlined underwater NDT reporting, improved data integrity, and clear visual documentation for UWILD surveys, offshore inspections, and marine asset integrity programs.
With a 500-meter (1,640 ft) depth rating, the Cygnus Mini ROV Mountable UT Meter is built for reliable ultrasonic thickness measurement in demanding subsea environments, from deep offshore platforms to underwater pipelines.
This depth capability ensures consistent performance without the risk of pressure-related failures, allowing operators to inspect critical assets well below typical recreational dive limits.
To further improve measurement accuracy, the system offers purpose-built G1 and S1 probe handlers.
The G1 features a double-jointed, shock-absorbing articulated mount with up to 15 degrees of movement to help maintain proper probe alignment, while the S1 uses magnetic attachment for stable positioning on ship hulls.
Together, these features reduce pilot strain, compensate for ROV movement in currents, and prevent unstable readings caused by poor probe contact—resulting in faster, more dependable subsea corrosion inspections.
The Cygnus Mini ROV Mountable UT Meter streamlines underwater inspection workflows with CygLink Windows® data logging software and direct drone app integration.
CygLink allows operators at the surface to remotely view readings, capture A-scans, add comments, and automatically generate PDF reports or export data to Excel—eliminating manual note-taking and reducing reporting errors.
For compatible systems like the Blueye X3, live thickness measurements can appear directly within the pilot’s primary navigation app, removing the need to juggle multiple screens during critical operations.
This seamless integration simplifies subsea ultrasonic thickness inspections, improves real-time decision-making, and enables easy livestreaming to remote stakeholders for faster, more collaborative asset integrity assessments.
Designed specifically for small observation-class ROVs, the Cygnus Mini ROV Mountable UT Meter features a compact, lightweight mount system that allows deployment on vehicles with or without manipulator arms.
This flexibility eliminates the need for large work-class ROVs or diver intervention, making underwater ultrasonic thickness inspections more accessible and cost-effective in confined or hazardous environments.
To further enhance measurement reliability, the built-in Echo Strength Indicator provides a clear visual reference of signal quality, helping operators confirm proper probe contact and stable readings in real time.
Together, these features reduce operator guesswork, minimize bad data collection, and ensure more accurate corrosion assessments during subsea NDT and IRM operations.
The Cygnus Mini ROV Mountable UT Meter features simple surface calibration, allowing operators to quickly calibrate the device via software or a remote display unit before or even during deployment.
There’s no need for complicated underwater adjustments or time-consuming manual setup while the ROV is in the water. This streamlined calibration process reduces pre-dive delays, eliminates operational frustration, and ensures accurate ultrasonic thickness measurements from the start of every inspection.
For teams performing subsea NDT, UWILD surveys, or offshore asset integrity assessments, faster setup means more productive dive time and lower overall inspection costs.
Ready to simplify your underwater thickness inspections?
Contact MFE Offshore to see how the Cygnus Mini can improve your next subsea operation.
| Materials Velocities | Velocities between 1000 m/s and 9995 m/s (0.0400 and 0.3998 in/microsec) |
| Plage de mesure dans l'acier | 1mm - 250mm (0.040" - 10.000") depending on selected probe and configuration, material and temperature |
| Précision | ±0.1mm (±0.004") or 0.1% of thickness measurement, whichever is greatest, when calibrated in accordance with Cygnus Instruments calibration procedure |
| Résolution | 0.1mm or 0.05 mm (selectable) (0.005" or 0.002") |
| Taille | 160mm x 62mm (6.3 x 2.4 in.) |
| Weight in Air | 550g (19.4 oz) |
| Température de fonctionnement | De -10°C à +50°C (14°F à 122°F) |
| Essais | Tested to 500m (1640ft) depth |
| Puissance | 7.5 - 30 V DC @ 150 mA (max) |
| Communication | RS-422, Simplex Single Pair or 2400 Baud (RS-232 9600 Baud output available as special order) |
| Affichage | PC or laptop with VGA (not included) |
| Probe Options | Single crystal probes |
| Agréments | RINA Type approved |
| Standards | Designed for EN 15317 |
| Conformité | CE, UKCA, RoHS |
| Garantie | 3 Years on gauge and 6 months on probe |
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