Published on:2026-05-24 Click:19
Multi-pair SM fiber buoyant ROV tether: 2x2x23AWG + 2x2x26AWG + 1x2x24AWG + 1 SM fiber. Foamed PUR for complex ROV tether with multiple signal pairs and single-mode fiber.
The multi-pair + SM fiber buoyant ROV tether (2x2x23AWG + 2x2x26AWG + 1x2x24AWG + 1 SM fiber) is a complex multi-protocol tether combining five independent twisted pairs of different gauges (each carrying a different data protocol bandwidth) alongside a single OS2 fiber for high-bandwidth video and Ethernet, all in a foamed buoyant jacket. This configuration is specified for ROVs with multiple bus protocols and instruments requiring different signal speeds and a fiber backbone. The foamed polyurethane (PUR) jacket uses a micro-cellular expanded jacket compound with a bulk density lower than seawater (~1.025 g/cm³), giving the cable near-zero or positive net buoyancy. This eliminates tether sag and reduces drag force on the ROV, improving vehicle manoeuvrability and reducing tether management workload during subsea operations.
| Parameter | Specification |
|---|---|
| Pairs Grp 1 | 2 x 2 x 23AWG (low-loss, high-bandwidth pairs) |
| Pairs Grp 2 | 2 x 2 x 26AWG (standard signal pairs) |
| Pairs Grp 3 | 1 x 2 x 24AWG (Cat5e grade) |
| Total Pairs | 5 x twisted pairs (10 conductors) |
| Fiber | 1 x SM OS2 9/125 μm |
| Jacket | Foamed micro-cellular PUR |
| Buoyancy | Near-neutral |
| Custom | Pair mix, fiber count, Kevlar, length |
Request datasheet, custom length, or OEM pricing: sales@rovcable.com -- Shanghai Kabel Intelligence Technology Co., Ltd.
The jacket is manufactured from a micro-cellular expanded (foamed) polyurethane compound. During extrusion, a controlled foaming agent creates millions of tiny closed-cell air pockets within the jacket wall. These air cells reduce the bulk density of the jacket below that of seawater (~1.025 g/cm³), producing positive or neutral net buoyancy. The jacket retains all the abrasion resistance, oil resistance, and flexibility of standard PUR while achieving the buoyancy needed for ROV tether applications.
Yes. Buoyancy (positive, neutral, or slightly negative) is tuned by adjusting the foam cell density in the jacket compound and the jacket wall thickness. Specify the required net buoyancy per metre (in g/m) and the water salinity (fresh / brackish / seawater) when ordering. We can also add a Kevlar or Dyneema strength member to increase tensile strength without significantly changing buoyancy.
