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Extreme Sealing for maximum realiability and maximum risk

Extreme sealing for maximum reliability & minimum risk

Guaranteeing extreme sealing to maximize reliability and reduce risks

When designing your equipment, choosing the right connectivity solutions with the right type of sealing early in the process is critical for the commercial success and durability of your product.

Not all IP68 ratings are created equal. Learn here why Fischer Connectors have has some of the toughest IP68 rated connectors in the industry, tested to a minimum of 2 meters and up to 300 meters (1000 feet) for the pre-cabled Fischer Core and Fischer FiberOptic solutions. Custom designs can give you even more.

Types: Environmental. Hermetic. High pressure.

Sealing is a complex science, involving physical aspects such as mechanical design, materials & surface science and fluid behavior.

There are three main sealing levels and solutions:

  • Environmental sealing, for equipment used outdoors and exposed to rain, dust or other aggressors for a limited time and limited pressure
  • Hermetic sealing, for vacuum applications, pressurized vessels or equipment used underwater, exposed for a longer time
  • High pressure sealing, for applications exposed to high pressure for extended periods

Application examples: Instrumentation. Underwater. Oil & gas.

  • Most instrumentation applications, which depend on data reliability, require rugged connectors sealed to IP68/IP69 to protect devices from environmental interference, or hermetic vacuum and pressurized equipment to prevent gas leaks.
  • As underwater applications may involve immersion over long periods, they require IP68 waterproof sealing.
  • As oil & gas applications are exposed to high pressures, shock and vibration, their sealing needs must be combined with high-strength mechanical design to guarantee safe and efficient operations.

Worldwide reputation: Fischer Connectors’ sealing technology & know-how.

Fischer Connectors keeps innovating in tested ultra-sealed connectivity solutions, increasing our track-record of customers who, for more 60 years, have chosen us for our proven reputation in watertight and hermetic, standard & custom solutions.

Conducting risk analyses against the strictest standards, our R&D department helps you carefully select solutions with the appropriate level of sealing to match the specific influences and conditions in which your device will operate.

Fischer Core Series

Any size, any configuration, any application: the highly configurable Fischer Core Series available in brass, stainless steel, aluminum
■ Rugged pre-cabled solution with the Fischer Core connector in brass, size 105, tested to 30 bar (300 m, 1000 ft)

■ IP69 / Hermetic
■ Corrosion resistant materials

■ Many contact layouts available
■ EMC shieldied at 360° 


Fischer MiniMax Series

Ultra-miniature high density: the rugged signal & power Fischer MiniMax™ Series - NEW: USB 3.0 and Ethernet up to 10 Gbit/s
■ IP68 mated & unmated
■ Submersible cable solutions tested down to 20m
■ 5,000 mating cycles
■ Rugged with high corrosion resistance


Fischer UltiMate Series

Ultra-rugged for extreme environments: the lightweight & compact Fischer UltiMate™ Series - NEW: high-power configurations and NATO STANAG 4695 intermateability
■ IP68  / IP69 / Hermetic, mated and unmated
■ Waterproof cable solutions tested to 120 m
■ 10,000 mating cycles
■ High corrosion resistance (1000 hours)
■ Operating temperatures: -55°C to +135°C


Fischer FiberOptic Series

Faultless high-speed data transmission: the easy-to-use Fischer FiberOptic Series

■ Pre-cabled solution tested to 30 bar (300 m, 1000 ft), mated sealing
■ Easy cleaning and high optical performances
■ 8° APC available 


CASE STUDY: SRS FUSION unmanned underwater vehicle (UUV) takes IP68-sealed Fischer FiberOptic down to 1,000 feet (300 m).


The unique orange fiber optic cable is terminated with a Fischer FiberOptic single-fiber connector (FO1) on both the topside and subsea ends, allowing for fast real-time transfer of HD video at gigabit speed.


Fischer Core Series Plug & use technology and breakthrough integration capability: the low-profile and easy-to-use Fischer Freedom™ Series and technology platform   
■ IP67- or IP68-rated membrane-sealed contacts for easy cleaning (both plug and receptacle) and protection from dust and sand
■ 360-degree mating freedom (no key code), blind-mate & non-magnetic locking
■ Ultra-rugged, EMI-shielded, resistant to shock, vibration, torque, and extreme temperatures
■ Optimized cable management


Fischer Core Series Safe storage of sensitive data in harsh environment: the Fischer Rugged Flash Drive
■ IP68 sealed, up to 120 m
■ Up to 100 MB/s read speed
■ Memory size up to 256 GB
■ USB 3.0 & 2.0
■ Resists corrosion & extreme temperatures
■ Ideally suited where data security and confidentiality are critical thanks to the unique UltiMate, MiniMax and Freedom interfaces


assembled solutions

Sealed and watertight cable assembly solutions: the connector being only one contributor to the sealing of the connectivity solution, the cable quality & performance is of paramount importance when it comes to guaranteeing an ultra-sealed connectivity solution for your application. 





Salt & marine environments

Salt strongly increases water’s conductivity, so seawater and salt mist can act as an electrolyte, causing galvanic corrosion. Choosing the right materials and coatings is therefore vital. In the following table you can find the specific coatings for some of our product lines. Contact us if you need more information.

Recommended product line

Raw material


Fischer Core Series Brass


Ni + Cr

Fischer Core Series Stainless Steel

Stainless steel 316L


Fischer UltiMate™ Series



Fischer FiberOptic Series


Ni + Cr

Fischer MiniMax™ Series


Ni + Cr


Videos "tests & proofs", white papers: Understanding different types of sealing

Get an overview of the difference between hermetic and environmental sealings, and understand how to select the best connectivity solutions to match your application needs.

Video Immersion test (Fischer Freedom™ Series)

Video IP68 degree of protection (Fischer Freedom™ Series)

This white paper focuses on environmental sealing as encountered in many areas, related to rain, dust, and high pressure sealing required for underwater applications. 

This white paper focuses on hermetic sealing especially when it comes to vacuum and gas tightness

White Paper Cable Assembly Solutions

This white paper explains the benefits of cable assembly solutions and what engineers need to consider when working on their interconnect solution.


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