Hollis 500SE + DC7 Regulator

Old School.  New Tech. The new 500SE utilizes a servo controlled valve to provide precision airflow and unparalleled performance for both air and trimix divers in a side exhaust configuration. To achieve this, we have perfected the original "lever-servo valve" we designed 35 years ago. Overbalanced diaphragm first stage also provides ideal hose routing for both backmount and sidemount users and optimum performance regardless of depth.

500SE Second Stage

    Pneumatically balanced servo valve system

    Patented Orthodontic Mouthpiece for comfort and reduced jaw fatigue

    Standard with 30" maxflex hose

    Easily disassembled without the use of tools and underwater if necessary

    Left or right positioning - no upside down

    Boltsnap tie point

DC7 First Stage

    High performance over-balanced first stage provides progressively greater intermediate pressure as depth and gas density increases for superior gas delivery under the most extreme conditions

    Fixed hose routing ideal for both backmount and sidemount configuration

    Environmental sealing prevents internal corrosion, contaminants, and icing of the first stage

    Designed to withstand the rigorous CE standard for coldwater performance

    Nitrox compatible to 40%

    2 High Pressure and 4 Low Pressure ports