Teledyne DGO offers h​igh reliability, high pressure connectors, penetrators, cabling and feedthrough systems for harsh environments

Teledyne DGO designs connection systems that transmit signals, data or power through challenging media, such as subsea oil wells, and ​ through pressure barriers​, such as the hull of a submarine. Because the cost of failure is so high, Teledyne DGO designs and manufactures its products to deliver total reliability. We engineer and manufacture our products as if lives and fortunes depended on them. Because they do. Teledyne DGO designs and manufactures systems to transmit signals, data and power in applications where failure to perform may contribute to substantial lost revenue, aborted missions or even loss of life:​

•Biomedical devices
•Deep-sea exploration vehicles
Offshore oil and gas operations
•Power generation, including nuclear power

Teledyne DGO applications typically bridge environments which absolutely cannot intermingle, such as the inside and outside of a submarine. The environments we keep out may exhibit any number of challenges:

•Corrosive elements
•Extreme temperatures
•High pressure or vacuum
•Mechanical stresses

But there's more. These environmental extremes typically have high cycle rates. And the solution must function under severe constraints regarding size, weight, cost, operational life, logistical support and safety, all the while meeting operational life requirements. When all these challenges add up to a critical mass, Teledyne DGO will have a solution.

Teledyne DGO's products include:
•Pressure hull penetrators and feedthroughs
•Cable assemblies
•Electrical Penetration Assemblies (EPA)
•Wellhead feedthrough systems

To fulfill our mission, we've mastered a toolkit that includes the most reliable technologies and materials capabilities:

•Fiber optics
•Glass-to-metal sealing
•Pressure-balanced, oil-filled (PBOF) cabling
•Dry mateable technology 

Molding Facility Certification
D.G. O'Brien has been certified by the United States Navy to manufacture submarine outboard cable assemblies and components. A copy of our certification can be downloaded he​re .​

Glas​s-to-metal sealing is the most reliable kind.​

Glass seals perform under high pressure, vacuum, high temperature, thermal cycling, radiation, shock and vibration. Totally inorganic, they won't degrade with time.

Benefits of glass-to-metal sealing:

  •  Extremely high durability
  • Mechanical stress and strain resistance
  • High shock and vibration resistance
  • Thermal shock stability and resistance
  • Chemical stability and resistance
  • Absolute hermeticity: zero diffusion or leakage
  • Long-term stability - inorganic, non-ageing
  • 60+ years of proven reliability

Proven in these environments

  • Hydrostatic: over 25,000 psig
  • Temperature shock: -40° to 204°C
  • Synergistic HPHT exposure
  • Vibration up to 2000 Hz
  • Mechanical and explosive shock > 10,000 g
  • Hermeticity: He leak rate less than 1 x 10-8 cm3/sec
  • Radiation
  • Steam ​
How is it done?
  • Repeatable, controlled manufacturing process
  • High temperature process > 1800°F (980°C)
  • Programmable logic controlled furnaces, specialized atmosphere control
  • Compression seal between conductor, glass and body
  • Optimize coefficient of thermal expansions

​Materials sealed: routine to exotic

Special materials processing is routine at Teledyne DGO. Direct glass-to-metal seals for body materials include titanium, Inconel, Monel®, K-Monel®, tantalum, Kovar and stainless steels such as 316L and Superduplex. Contact materials include copper, Alumel®, Chromel®, constantan, Kovar®, platinum, molybdenum, Inconel®, Hastelloy®, Incoloy®, tantalum and carbon steel. ​

In addition to glass-to-metal sealing, Teledyne DGO controls quality by performing the following key processes in-house; gold, nickel and solder plating; heat treating; and nickel, copper and silver brazing​​​​​

24 Hour Support

For emergency field service, call

 +1 386 236 0780 or +1 800 234 6930.

Vincente Ramirez (mobile: 713 297 1420)

Angie Hebert (mobile: 386 697 4050)


To schedule field service, please email:

[email protected]

New Hampshire / DGO Headquarters162 Corporate Drive
Portsmouth, New Hampshire 03801 USA
Phone: 603-474-5571
[email protected]
Houston, TX / Field Support Office

14880 Skinner Rd

Cypress, TX 77429

Heather Lavender (mobile: 281 851 9921)

Email: [email protected]

Europe / Field Support Office

ABZ Business Park

International Avenue
Dyce, Aberdeen

AB21 0BH
Scotland, UK
Tel: +44 (0) 1224 047001

Email: [email protected]

Brazil / FIeld Support Office

Av. das Américas, 7935 sala 532

Barra da Tijuca

22793-081 Rio de Janeiro, RJ Brazil

Tel: +55 21 3217-2023 

Email: [email protected]

Malaysia / Field Support Office

Unit C-09-05, Oasis Square, No. 2, Jalan PJU 1A/7A, Ara Damansara

47301 Petaling Jaya, Selangor D. E., MALAYSIA.

Tel: +603.7859.7713 / 7714 

Email: [email protected] ​​

​Customer Terms and Conditions

T​​eledyne General Terms and Conditions of Sale 🡥​​​​​​