BIRNS penetrators transmit electrical power/signal through a pressure boundary, decrease the complexity of electrical systems, and reduce dependence on operator skill. (Need Chamber Lights?) Read Frequently Asked Questions.

Read about Hull Penetrators.


You can customize BIRNS Penetrators as follows:

NPT Penetrators have tapered "pipe" threads and are widely used on diving bells and decompression chambers. Available sizes are:

BIRNS NPT Penetrators are made with AISI 316 stainless steel shells, passivated per QQ-P-35 type VI. They are rated for use up to 80°C (176°F) when fabricated with neoprene (polychloroprene) cable jackets, or up to 95°C (203°F) with optional CSPE cable jackets.



Straight Penetrators have standard UN-2A mounting threads, and are widely used on diving bells. (Read about submarine Hull Penetrators.) We can usually provide your choice of cable type and configuration. Standard pressure rating is 70 bar (1,000 PSI / 2,300 FSW); higher ratings are available. Available sizes are:

These are made of AISI 316 stainless steel, passivated per QQ-P-35 type VI. Cables are mechanically reinforced with high-strength potting compound and seal-overmolded with polyurethane.

An exciting option to our Straight penetrator assemblies is the addition of our BIRNS DPT (Delamination Preclusion Technology), a permanent non-conductive layer which, when combined with BIRNS' system of bonding preparation, prevents cathodic delamination of the elastomeric overmolding from the stainless steel substrate.

BIRNS designs and manufactures Special Penetrators for your custom requirements-- contact us.