Premium stainless strength with outstanding corrosion resistance.

The ST1 uses marine-grade 316 stainless steel for the first stage, offering superb corrosion resistance and long-term durability. Paired with Atomic’s feather-light titanium second stage, it’s built for divers who spend serious time in saltwater and want a regulator that holds up without compromise.

Key Benefits

• Corrosion-tough build 316 stainless resists pitting—perfect for liveaboards or frequent saltwater diving.
• Light second stage Titanium keeps the reg comfortable in your mouth during long dives.
• Flexible routing Swivel turret and bottom LP port simplify streamlined setups.

Internal Engineering & Materials

• Titanium valve body & orifice Immune to corrosion and lightweight.
• Pneumatic balancing + AFC Keeps inhalation smooth without manual adjustments.
• Kevlar lever + silicone exhaust Durable, efficient, and easy breathing on every dive.

Key Specifications

• First Stage Type Balanced piston
• Material 316 stainless first stage; titanium-featured second stage
• Environmental Sealing Factory sealed
• Ports 2 HP / 5 LP total (swivel turret + bottom LP)
• Swivel 360° turret
• Nitrox Up to 40% O₂
• Total Weight ~2.3 lb (first + second stage with hose)
• Second Stage Weight ~11 oz
• Service Interval 2 years or 300 dives
• Warranty Limited lifetime (original owner)

Built with marine-grade stainless and titanium, the ST1 is the perfect regulator for divers who prioritize durability and saltwater longevity without sacrificing lightweight comfort.