PDK81602-2*2.5+2*1SMF Dual-Sheath Buoyancy Cable – 2x2.5mm² Power + Dual SMF, Bare Copper, PP Insulation, TPU + Foamed TPU Jackets, 100KG Tensile, For ROV & Subsea Floats

This PDK81602 dual‑sheath buoyancy cable is specifically engineered for underwater and floating applications that require a combination of high‑current power delivery, high‑bandwidth optical data transmission, and low underwater weight – all with moderate pull resistance. It integrates two 2.5 mm² (approx. AWG 14) stranded bare copper power conductors for efficient energy transmission and two single‑mode optical fibers (2×1SMF) for high‑speed, EMI‑immune communication. All copper conductors are bare copper to minimize resistance and voltage drop over extended cable runs. PP (Polypropylene) provides primary insulation with excellent dielectric properties, very low moisture absorption, and stable performance across a wide temperature range. The cable features a dual‑sheath buoyancy system: an inner TPU (Thermoplastic Polyurethane) sheath offers robust mechanical protection and watertight sealing, while an outer foamed TPU sheath significantly reduces overall density to achieve near‑neutral or positive buoyancy in seawater. The cable is reinforced with high‑strength synthetic yarns to deliver a 100 kg breaking strength (approx. 980 N), enabling safe deployment and recovery from surface vessels or floating platforms without risk of tensile failure. The construction incorporates water‑swellable tapes and pressure‑resistant fillers to prevent radial and longitudinal water ingress. This cable is ideal for ROV floating tethers, subsea instrument nodes, oceanographic moorings, and marine renewable energy systems – where high power, fiber‑optic telemetry, lightweight flotation, and moderate pull capacity are essential.

Key Features – Bare Copper, PP Insulation, Dual Sheath (TPU + Foamed TPU), 100KG Tensile

100 kg tensile strength – integrated aramid strength members allow the cable to withstand pulling forces up to 100 kg, ensuring safe handling and installation without overloading the fiber or conductors.

Bare copper conductors (2×2.5 mm²) – two stranded bare copper cores for low‑resistance power transmission (up to 20‑25 A), suitable for supplying cameras, lights, thrusters, and sensor payloads.

Dual single‑mode fibers (2×1SMF) – two optical fibers (9/125 µm) for ultra‑high‑bandwidth data links, ideal for real‑time HD video, sonar, telemetry, and control signals – completely immune to electromagnetic interference.

PP insulation – rated -40°C to +105°C; low dielectric constant, negligible moisture absorption, and resistance to seawater, acids, and many chemicals – ensuring stable insulation over long‑term immersion.

TPU inner sheath – solid polyurethane layer provides excellent abrasion, cut, and tear resistance, protecting the core during handling and deployment.

Foamed TPU outer sheath – micro‑cellular foamed structure lowers cable density (<1.0 g/cm³) for buoyancy, while retaining the flexibility, hydrolysis, and UV resistance of solid TPU.

Watertight construction – multi‑layer water‑blocking tapes and pressure‑extruded core filler prevent water migration along the cable, even under hydrostatic pressure.

Ideal For

ROV and AUV floating tethers that need both high‑power (2.5 mm²) and dual fiber‑optic channels with neutral buoyancy

Subsea observation platforms and oceanographic drifting buoys requiring lightweight, low‑drag cabling

Marine renewable energy monitoring systems (wave, tidal) with submerged power distribution and fiber backhaul

Underwater camera and lighting arrays with separate power feeds and real‑time video over fiber

Military expendable surveillance cables and acoustic arrays requiring positive buoyancy and moderate tensile capacity

Any subsea application demanding 2 power cores + 2 fibers + buoyancy + 100kg pull strength

Conclusion
This PDK81602 dual‑sheath buoyancy cable delivers a well‑balanced solution for underwater systems that need significant power, high‑speed fiber optic data, and controlled flotation. The combination of bare copper power conductors, PP insulation, two single‑mode fibers, a TPU inner sheath, and a foamed TPU outer jacket – reinforced to 100 kg tensile – ensures reliable, lightweight, and durable performance in demanding marine environments. It is an ideal choice for advanced ROV tethers, sensor networks, and oceanographic research.

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