Neptune Fluorescent Detection
Neptune’s fluorescent leak detection system is based around a family of submersible long-range fluorometers. The sensors respond to a range of fluorescent leak detection dyes and liquid hydrocarbons at low concentrations. The advantage of Neptune’s fluorescence detector system is the ability to detect very low concentrations in turbid conditions with a high spatial coverage using the new family of long range remote sensing fluorometers.
The submersible fluorometers are very sensitive and will detect fluorescent leak detection dye at concentrations so low as to be invisible to the naked eye or underwater camera.
Neptune Oceanographics has recently and successfully introduced a new range of long-range fluorometers. The long-range fluorescent detector has a forward facing ‘tuned’ light source (like a torch) producing a beam of excitation light spreading to about 40cm diameter at 3m. Fluoresced light signals generated in the leaked fluid are detected by the sensor and converted for transmission to the surface via the ROV umbilical for display and recording.
By mounting the fluorescence detector on the ROV manip and because the sensors have high spatial coverage, quick and easy scanning for leaks is achieved without needing to consider tidal flow direction to ‘capture’ dye as is necessary with most fluorometers.
Other major advantages of the long-range fluorescent detection include the detection of leaks from risers while working at safe distances and detecting leaks within confined structures where ROV access is not possible or too hazardous.
Where subsea control systems or hydrostatic pressure testing are concerned, fluorescent dye is normally added as a component solely for the purpose of leak detection, however, Fluorescein, the most commonly used dye, is being phased out as it no longer complies with the latest legislation for discharges at sea. Other leak tracers such as UV clear dye, Roemex’s 9022 red dye, Rhodamine, etc., have been tested to demonstrate their compliance with the latest legislation and are now widely used. Neptune Oceanographics’ Long Ranger family of leak detection sensors have the potential to detect fluorescent dyes, crude oil, hydrocarbon based control fluids, etc. at distances of up to 20m from the leak.
- Detects leaks from submarine pipeline installations
- Operates to depths of 3000m standard (6000m special)
- High spatial detection capability
- Detects very low concentrations (0.002μg/l Fluorescein, Roemex 9022 and Castrol SPF)
- Detects crude oil, lubricating oil and hydrocarbon based control fluids
- Real time display on-board ship. 2 channels can be displayed simultaneously
- Proven solution for riser inspections (remote sensing for safe working distances from riser)
- Detects leaks within structures where ROV access is not possible
- Can be used in single or multiple sensor mode for detailed inspections
- ROV, AUV, Towed Vehicle or diver deployment
- Proven track record
- Available worldwide at short notice
- Experienced operators