Beautifully machined. Beautiful performance. And it keeps the oceans beautiful, too. As the first “Green” regulator ever designed, the ST1 is made of a special grade of 316 Stainless Steel that is 100% recyclable. The ST1 offers superior corrosion-resistance and does not require Chrome or Nickel-plating processes that create environmental concerns.

WEIGHT

All this Stainless Steel durability weighs just 2.3 pounds (yoke version), making the ST1 an excellent travel companion.

ST1 FIRST STAGE FEATURES

• Beautifully machined from a special Atomic grade solid 316 SS.
• Atomic Aquatics exclusive balanced Jet Seat high-flow piston.
• Freeze-protected and factory-sealed to prevent outside contamination from silt and sand.
• Nitrox ready – approved for non-dedicated EAN use with mixtures up to 40%.
• Ports: 2 HP fixed / 5 LP on swivel cap

ST1 SECOND STAGE FEATURES

• Pneumatically-balanced poppet, high-flow case and lever design for easy breathing at all depths and tank pressures.
• Patented Atomic Aquatics AFC – Automatic Flow Control.
• Soft overmolded Rapid Adjustment Knob for manual detuning in special situations such as surf entries or octo use.
• Patented Atomic Aquatics Titanium Seat Saving Dynamic Orifice maintains crisp like-new factory tuning and prevents damage during storage.
• Hose features patented Stainless Steel Atomic Aquatics Comfort Swivel with Black PVD coating.
• Dual material second stage cover enables entire front to be used for purge.
• Elliptical exhaust valve dramatically reduces exhalation effort at depth.
• Dual silicone comfort fit mouthpiece with tear-resistant bite tabs – both comfortable and durable.
• Optional ST1 color kit lets you express your style.