Poseidon CCR Rebreathers — SE7EN / SE7EN+ / MKVI
Silent performance, smart safety and modular growth from recreational to 100+ m technical diving.
Why a Poseidon CCR?
Pioneering automation plus robust engineering make Poseidon’s SE7EN / SE7EN+ and MKVI stand out for quiet, bubble-free dives, extended duration (~3 hours) and a platform that can grow from ~40 m recreational to 100 m+ technical diving as your skills progress.
Refs: Poseidon SE7EN+ overview (40 m → 100+ m; ~3 h) and performance highlights. :contentReference[oaicite:0]{index=0}
How it works (CCR in a nutshell)
- Closed breathing loop with counterlungs, loop hoses and a scrubber removes CO2 and recycles gas.
- Two cylinders: O2 and diluent (air/nitrox/trimix depending on configuration).
- Electronics module controls O2 injection to maintain setpoint; redundant O2 sensors validate readings.
- Switchable mouthpiece (BOV/DSV) lets you go from closed circuit to open circuit in one move; ADV adds diluent on descent.
Refs: Tech specs and system components; CCR FAQs. :contentReference[oaicite:1]{index=1}
Key features that divers love
Automation & safety
Automated pre-dive tests, continuous sensor validation and clear alarms. The HUD communicates PPO2 via LEDs and vibration for instant awareness.
Refs: E-module auto tests; SE7EN HUD. :contentReference[oaicite:2]{index=2}
Scrubber endurance
Self-pack canister designed for commonly used absorbent (e.g., Sofnolime Grade 797) and typical recreational endurance of about 3 hours (conditions dependent).
Refs: Poseidon tech specs; DGX FAQ on 797 compatibility. :contentReference[oaicite:3]{index=3}
Intuitive UI
M28 dive computer with rich graphics, dual-button control and Dive-By-Wire™ integration; easy log downloads.
Ref: M28 overview. :contentReference[oaicite:4]{index=4}
Modular growth
Start with a sport configuration and expand to 100 m+ technical diving as you add components and skills.
Refs: SE7EN+ configured 40 m → expandable 100+ m. :contentReference[oaicite:5]{index=5}
Refs: HUD article; Rebreather cover. :contentReference[oaicite:6]{index=6}
Models & configurations
- SE7EN+ — latest electronics module with native support for solid-state O2 sensors and simplified solenoid architecture; designed to be easier to service and upgrade.
- SE7EN — proven platform widely used for both sport and tech; upgrade paths available in many regions.
- MKVI — the original “Discovery” generation; many units still in use and serviceable, with documented upgrade options to newer modules in some cases.
Refs: SE7EN+ vs SE7EN differences; MKVI → SE7EN upgrade note. :contentReference[oaicite:7]{index=7}
Care & maintenance
CCR ownership rewards discipline. Follow assembly/maintenance tutorials, respect service intervals and log sensor/scrubber changes. Authorized centers typically recommend periodic service at ≤ 104 weeks (check your unit’s current POST status).
- Watch: Poseidon SE7EN instructions playlist
- Typical service guidance: authorized center periodic maintenance
Refs: Service interval guidance; official how-to videos. :contentReference[oaicite:8]{index=8}
Watch it in action
Videos from Poseidon’s official channel. :contentReference[oaicite:9]{index=9}
Quick FAQ
How deep can I dive with SE7EN+?
Configured for ~40 m out of the box and expandable to 100+ m with appropriate components and training.
Ref: Poseidon SE7EN+ page. :contentReference[oaicite:10]{index=10}
What’s different in SE7EN+ vs SE7EN?
Updated e-module with native solid-state O2 sensor support and fewer solenoids for streamlined reliability.
Ref: DGX rebreather FAQ. :contentReference[oaicite:11]{index=11}
Does the HUD vibrate?
Yes — the HUD provides visual LEDs and tactile vibration alerts.
Ref: Poseidon HUD article. :contentReference[oaicite:12]{index=12}
