In a world full of compromise, we escape by visiting the one place that doesn’t; the ocean. Yet when we get there, we are forced to compromise. Not any more…

Designed, built and tested to perform in all conditions, the POSEIDON SE7EN is the next generation rebreather. Safety, performance, ease of use and desirability are combined to enable divers of all abilities to experience the underwater world without compromise.

Whether you want to get closer to marine life, spend much more time underwater, dive deeper or simply enjoy the bubble-free silence, the POSEIDON SE7EN is the smartest, fastest, safest way to dive.

The POSEIDON SE7EN – one day, all rebreathers will be like it.

Want to learn more about Rebreathers, how they work, how to become a rebreather diver, and where you can go rebreather diving? CLICK HERE!


Poseidon SE7EN Brochure

Poseidon SE7EN Buyer's Guide

Poseidon SE7EN Q&A

Poseidon MKVI Owners Upgrade Guide

Poseidon SE7EN User Manual

Poseidon SE7EN EU Specification

Poseidon SE7EN US Specification

Required Options
Smart Batteries

Aluminum / Steel cylinders

Rebreather BCD
Recreational Counter Lungs
Technical Counter Lungs

Tank Band Standard
Tank Strap & Buckle
Cylinder QMR

Higly Recommended Extras
11-Inch Adapter

Jetstream Octupus

Rebreather Wing & Backplate
One Wing & One Harness

Optional Extras
Rebreather Accessories

Find your closest dealer.


The Next Generation Rebreather
The Next Generation Rebreather!

Developed from the world’s first recreational rebreather, the legendary Poseidon MKVI, the POSEIDON SE7EN gives you 7 Next Generation Benefits:

G7 Inside
Generation 7 electronics open up endless possibilities for interaction, accessories and apps. Entirely new internal hardware driven by a new generation of firmware makes the SE7EN faster, flexible and reliable in any diving environment.

Bluetooth Connectivity
Download your dive logs in seconds, update your settings and interact effortlessly with your POSEIDON SE7EN, all using Bluetooth

Dive Management System
Enjoy enhanced interaction with your rebreather. The upgraded configuration tool interacts with your POSEIDON SE7EN via Bluetooth, allowing you to make configuration changes in moments. See your dive logs in far greater detail and much more. Better still, it’s now Mac compatible!

Recreational or 100M Technical Rebreather
The POSEIDON SE7EN can be whatever you want it to be! You can use the SE7EN as a Recreational Rebreather or as a 100M-rated Technical Rebreather; it’s your choice! Poseidon’s industry-leading upgrades give you the ultimate recreational and technical rebreather flexibility

Enhanced Service & Support
Poseidon already has class-leading reliability and technical support, but the POSEIDON SE7EN makes service and support even easier and more convenient. Automatic dive log downloads to support via Bluetooth, combined with detachable displays and sensors mean that support is even faster and more convenient than before!

Upgraded Mouthpiece
The best rebreather mouthpiece just got even better! A new system keeps the bail-out valve locked in place in closed or open circuit, while still enabling simple switches from closed to open circuit

Protective, desirable and functional in equal measures, the cover on the Poseidon SE7EN has a built-in handle and trim weight system, along with grab and lighting rails.



POSEIDON SE7EN at the DEMA 2013 Show