Green and yellow cosmetic pieces clearly identify that this regulator is dedicated for high-percentage oxygen use.
The compact DS4 first stage has four medium-pressure ports and one high-pressure port (it does not feature the rotating turret found on the DST first stage).
This 1st Stage is suitable for use with up to 100% oxygen.
This comes as M26 as standard.
- DS4 first stage.
- Unique over-balanced, diaphragm design - as the diver descends, the over-balancing feature allows the medium pressure gas in the hose to increase at a rate faster than ambient. This results in superior performance at depth.
- 2 HP ports and 4 MP ports are angled for optimum hose routing.
- An environmental dry system keeps water out of the main spring chamber thus preventing ice buildup and keeping silt and contamination out.