What does “Import Substitution” mean for HYSF customers?

“Import Substitution” is HYSF’s strategic mission to provide high-performance domestic alternatives to international monopolies. For customers, this means accessing deep-sea connectors that match the quality and specifications of global brands (like SubConn®) but with significantly lower costs and shorter lead times.

HYSF was founded with the goal of challenging the dominance of international brands in the subsea sector.

Breaking Monopolies: Through independent technological innovation, we have developed products that offer the same performance as expensive imported brands.
Seamless Transition: Our connectors feature full interface interchangeability, allowing clients to switch to HYSF products without redesigning their systems.
Supply Chain Security: As a domestic high-tech enterprise, we offer a stable supply chain immune to some of the logistical disruptions affecting imported goods.

John Zhang

(CEO & Lead Engineer)
Email: info@hysfsubsea.com
With over 15 years of expertise in subsea interconnect technology, I lead HYSF's R&D team in designing high-pressure (60MPa) solutions. My focus is on ensuring zero-leakage reliability for ROVs, AUVs, and offshore instrumentation. I personally oversee the validation of our custom connector prototypes.

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Proven Solutions in the Field

A showcase of our successful collaborations with global marine robotics, energy, and research partners. Every project reflects our commitment to zero-leak integrity and operational reliability.

Ultra-Miniature Subsea Watertight Connector Series (2-28 Pins)

50MPa High-Precision Subsea Pressure Sensor

Single-Pin High-Current (150A) Subsea Power Connector

Custom Branching Subsea Cable Network (Tree Topology)

PBOF Series Pressure-Balanced Oil-Filled Subsea Connectors

Gigabit Ethernet 12-Pin Subsea Connector (4 Power + 8 Network)

Custom Branching Subsea Cable Network (Y-Splitter & Multi-Node)

60MPa Metal Shell Bulkhead Connector with Triple Seal (4-61 Pins)

70MPa Ultra-High Pressure Metal 61-Pin Subsea Connector

5MP High-Definition Underwater Observation Camera (40MPa)

High-Performance Photoelectric Hybrid Subsea Connector

MCPBOF2-8MF Oil-Filled Pressure Compensated Connector (8-Pin)

Custom 1-to-3 Fan-out Subsea Splitter Cable System

Right Angle Molded Micro Bulkhead Connector (LPMBH-IL12/16MF Compatible)

High-Frequency Subsea Coaxial RF Connector Assembly (50-3 / 50-5)

5MP High-Definition Underwater Camera (40MPa / 316L Stainless Steel)

Custom 6-Pin / 40A Medium-Power Subsea Connector

RMG Series 4-Pin Subsea Engineering Cable Plug

Multi-Core Split-Type Watertight Connector (Diverse Configurations)

Custom 6-Port Watertight Enclosure & Subsea Interconnect System

MCBH-Hybrid 4+2 Photoelectric Subsea Connector (Power & Fiber Optic)

Custom Retractable Subsea Spiral Coiled Cable (Spring Cable)

Integrated Subsea Interconnect & Imaging Solutions

Micro Flange 3-Pin Subsea Bulkhead Connector (IL4MF Compatible)

Custom 6-Port Watertight Enclosure & Subsea Interconnect System

60MPa High-Pressure Metal Shell Watertight Connector (4-61 Pins)

All-New Next-Generation Subsea IP Network Camera Series

10-Pin Ethernet Subsea Connector (2 Power + 8 Network Cores)

Custom Miniature Single-Core In-Line Watertight Connector

Custom Molded Subsea Penetrator with Integrated Multi-Core Cable

HYSF-custom-6-pin-40A-underwater-power-distribution-connector

Miniature Subsea Watertight Connector (Marine Bronze Base)

High-Strength Titanium Alloy Subsea Penetrator

HYSF-140A-180A-high-current-underwater-power-connector-for-thrusters

HYSF-high-density-25-pin-subsea-signal-connector-for-oceanographic-sensors

Custom High-Intensity Subsea LED Light & Mounting Bracket System

Custom Subsea Bulkhead Flange Joint Connector

Start Your Subsea Project with HYSF

Whether you need a quick quote for standard connectors or a complex custom cable assembly, our engineering team is ready to assist. Expect a technical response within 12 hours.