We set out to improve WOB on the O2ptima and have achieved that with the DSV 300. The improved WOB puts the O2ptima in line with rebreathers that cost much more and in some cases, now outperforms them. (Click DOWNLOADS to the left to see test results).
The WOB improvement is entirely based on the DSV change of a larger bore and new mushroom valves. The loop hoses have remained the same size. Hoses now attach with locking rings, making assembly easy and the mushroom valves are now in the hose inserts rather than the mouthpiece. The DIVA mounts on the hose-side of the locking ring moving it farther from center, which is easier to see and not obstructive to the diver's view.
The O2ptima continues to have the smallest breathing loop on the market.
Dive Rite is the pioneering creator of technical SCUBA diving equipment for advanced, wreck and cave diving. Our Catalog is vast, ranging from backplates, harnesses and wings (BCDs) to regulators, lights, drysuits and rebreathers. To purchase Dive Rite technical dive gear, find a dealer near you. Also, see the Tech Tour schedule to learn if the Dive Rite team will be near you soon.