Atomic ST1 Regulator


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The Atomic ST1 is another high performance regulator that utilises their flow-through balanced piston first stage and pneumatically balanced second stage but this time the first stage is made out of stainless steel, which delivers virtually the same corrosion resistance as Titanium but at a lower price.

Atomic have used Stainless Steel because it does not require protective chrome or nickel plating processes that can be harmful to the environment and stainless steel is 100% recyclable so that it can be reused when it eventually comes to the end of it usable life. Stainless steel is also better at dissipating the extreme cold generated by the regulator as gas is decompressed into each stage, giving it better cold water performance and reliability than chrome plated brass. Like the rest of the Atomic regulator range the first stage it fitted with five low pressure ports on a swivelling turret and two high pressure ports on the main body

The second stage features all-Titanium components as in the T3 and B2 models for excellent durability and corrosion resistant characteristics. The ST1 features the Atomic seat saving oriface within its pneumatically balanced valve to prolong the life of the low pressure seat, allowing for a two year / 300 dive service period. The second stage is also fitted with a diver adjustable inhalation resistance control and an automatically adjusting venturi vane (AFC) which works to minimise the risk of an unexpected freeflow.

First Stage:

  • First stage machined from solid 316 Stainless Steel
  • Atomic Jet Seat high-flow piston first stage
  • Freeze protected factory-sealed first stage also prevents contamination such as silt and sand
  • Nitrox ready for mixtures up to 40%
  • First stage ports: 2 HP fixed / 5 LP on swivel cap

Second Stage:

  • All-Titanium second stage construction same as Atomic T2 and B2 models
  • Patented Atomic Seat Saving Orifice (Titanium)
  • Patented Atomic Automatic Flow Control (AFC)
  • Rapid adjustment knob for manual second stage de-tuning in special situations
  • All-stainless steel Atomic Comfort Swivel standard
  • A new high-flow second stage case lowers breathing effort at any depth from shallow water to beyond the limits
  • Dual material second stage cover enables entire front to be used for purge
  • Dual silicone comfort fit mouthpiece with tear-resistant bite tabs
  • 2 year / 300 dive service interval
  • Limited Lifetime Warranty – not contingent on proof of service
  • Wide exhaust deflector to disperse bubbles for enhanced visibility


If you change your mind, it doesn’t fit, or you become inflicted with buyer’s regret - that's OK!

Mike's Dive Store offer an extended returns policy of 30 days - so you can be rest assured if the suit, piece of diving equipment or gift doesn't suit then just send it back and we will either exchange it or offer a full refund less any postage costs. Too easy!

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