D3 & D5 DyeLighter

Subsea dye fluorescence leak detection

  • Modern day replacement for “black lights”

  • Rhodamine, Ultraviolet or Fluorescein dye detection

  • Focused beam and filtered high intensity LEDs

  • Depth ratings of 400m, 4000m and 8000m

The D3 and D5 DyeLighter systems are a cost-effective replacement for old-fashioned “black lights” for the detection of subsea dye. High-power LED light is focused through lenses and filters to create a very narrow high energy beam that is tuned to a specific wavelength to cause maximum fluorescence of the dye. The fluorescing dye is then detected using the ROV’s camera.

The ultra compact D3 DyeLighter has been designed for smaller observation ROVs that are capable of getting into very small spaces. It contains a single focused beam and filtered high intensity LED.

The more powerful D5 DyeLighter contains three of the focused LEDs and may be fitted to larger work class ROVs that might not be able to get as close to the source of the leak.

For smaller leaks the advanced D7 DyeTector should be considered. It contains the very latest photon multiplier technology to detect molecules of dye down to single digit parts per billion.

Infrastructure leaks

A DyeLighter may be used to detect leaks from subsea infrastructure such as manifolds, wellheads or pipelines if a suitable dye has been added to the infrastructure fluids.

Cementing operations

A DyeLigher may also be used during casing cementing operations to detect cement returns if a tracer dye is added to either the seawater spacer or to the cement itself. Unlike pH meters which rely upon the cement passing over them, a DyeLighter can detect cement from a distance of several metres depending on the concentration of dye.

Detection dyes

Versions of both the D3 and D5 DyeLighter systems are designed to detect specific types of dye in addition to OceanTools C-Dye and C-Dye 370, including:

  • Rhodamine dyes such as B275, RX9022, Pelagic 100 Pink

  • Ultraviolet dyes such as RX9026E, Pelagic 100, Champion Cleardye, Castrol HT2

  • Fluorescein dyes such as HW443, HW540P, Oceanic Yellow LTF