Cygnus FMD System for ROV

Ultrasonic Flooded Member Detection System

For mounting onto remotely operated vehicles inspecting subsea members, to determine if there is water ingress. This flooded member detector combines intelligent and advanced software with an electronics interface that is truly simple to use. The innovative, fail-safe design means the FMD system can be operated by operators of varying experiences.

Comprising of probe with probe handler, subsea electronics unit and reporting software – this ultrasonic flooded member detection system provides a simple DRY (Green) or FLOODED (Red) result along with A-scans to assist with verification.

  • Easy to Use: The Cygnus FMD has an innovative probe handling solution which self-aligns, ensuring correct contact with the member, even when approached from an angle. The system returns a simple DRY or FLOODED result to the reporting software with results logged at the surface.
  • Cost Effective: The Cygnus FMD System extremely easy to learn and understand. Due to its simplicity and innovative fail-safe design the FMD system can be used by a range of operators, with varying experience, without the need for external contractors.
  • Rugged: Available in high grade acetal or stainless steel for the harshest environments. The FMD is designed to the highest standards and supplied with a 3-year warranty.
  • Reliable: To ensure the highest level of Probability of Detection and eliminate false readings, the purpose-designed algorithm simultaneously uses: advanced signal processing; an advanced peak detection algorithm and low distortion / low noise data acquisition. The system will only take a measurement when the contact sensor detects probe contact, ensuring reliable results every time. The reporting software will indicate at the surface should the probe lose contact during a test. There is also a ‘System Test’ function to ensure the reliability of the system before it is deployed.
  • Versatile: Being of a compact design the probe is able to get into hard-to-reach areas, such as K nodes, where other inspection methods cannot. A range of versatile options to suit working depths and varying requirements are available.
Probe0.5 MHz high power piezo composite probe – single element
Measuring Range200 – 2000 mm member diameter
Resolution1 mm


Diver Communications PSU110-240 AC 50/60 Hz @ 1A (max)
ROV Power Supply12 to 24 volt D.C @ 60mA


DigitalRS232 & RS485
Baud Rate115,200
Date CaptureOn demand 3 shot and varying gain levels
Diver Data LinkRS485 half – duplex
ROV Date LinkRS232 full – duplex suitable for fibre multiplexers


Acetal Electronics Body0.9 kg
95 x 115 mm
Stainless Steel Electronics Body4 kg
95 x 115 mm
Acetal Probe Handler2.5 kg
140 x 170 x 130 mm
Stainless Steel Probe Handler4.7 kg
140 x 170 x 130 mm
120m Umbilical Cable23 kg
340 x 450 x 555 mm
350m Umbilical Cable87 kg
450 x 600 x 930 mm
50m Deck Cable13 kg
290 x 380 x 490 mm
Depth Rating300 msw
Operation Temperature0°C to +75°C
Storage Temperature-40°C to 55°C
Cable Protector
– Provides extra cable protection and an attachment point for divers
Self Aligning Probe Handler
– Tough Stainless Steel or
– Lightweight Acetal
Handle Options
– T-Bar
– Fishtail
Umbilical Cable
– 120m length
– 350m length
System Test Tank
– Used to run a full system test of the FMD system

1 review for Cygnus FMD System for ROV

Avatar Of Louis P.

Louis P.

Nov 25, 2020 1:36 PM

The new Cygnus Ultrasonic FMD System was perfect for our recent application. Our technicians found the software to be very easy to use with features that ensured a quick and reliable result. It’s a great addition to the Westerton Access capability, offering FMD inspection from the Falcon ROV.

Your email address will not be published. Required fields are marked *

Your Rating