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ST1 Regulator

£708.00 RRP £717.00

Rated 5.0 out of 5
4 Reviews

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Atomic ST1 Regulator
Atomic ST1 Regulator Atomic ST1 Regulator Atomic ST1 Regulator Atomic ST1 Regulator Atomic ST1 Regulator Atomic ST1 Regulator Atomic ST1 Regulator

ST1 Regulator


Rated 5.0 out of 5
4 Reviews

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ST1 Regulator

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ST1 Regulator

£708.00 RRP £717.00 In Stock

Brand: Atomic

Model: ST1 Regulator

SKU: 10188-1

Please note: This item cannot be shipped outside the European Union - learn more

The Atomic ST1 Regulator is a high quality beautifully crafted regulator that delivers outstanding performance and looks great. The 5 ported swivel turret 1st stage is machined from a unique 316 stainless steel, unlike conventional brass 1st stages, which performs better and is kinder to the environment.


Swivel Turret

The 1st stage has 5 Low Pressure ports on a swiveling turret which allow the hoses to rotate around the first stage with the 5th port facing upwards. This gives added flexibility in hose routing prefered by many sidemount divers.

The 2nd stage also features a swivel ball joint on the hose that reduces jaw fatigue as the hose can route in at a greater degree instead of just 90°.


Titanium Parts

The internal mechanism of the 2nd stage uses the same Titanium parts as the T2 and B2 models which is stronger, lighter and has a greater corrosion resistance compared to brass or stainless steel parts.


The 2nd stage also features a Seat Saving Orifice that takes the pressure off the seal enhancing the lifetime and performance of the regulator. Inside the 2nd stage is a soft seal and an orifice pushed against it behind a spring which only opens when you draw a breathe. When disconnected from your cylinder the SSO pulls the orifice back relieving the pressure against the seat. As soon as the regulator is pressurised or submerged the spring reactivates to seal the 2nd stage.


Automatic Flow Control

The ST1 2nd stage features Atomic's AFC system that automatically interrupts freeflows before they occur by using a flexible venturi system that redirects freeflowing gas back into the 2nd stage to equalise the pressure.



Prescription Lenses



1st 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


2nd 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
View product manual
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Atomic ST1 Regulator - Features

FeatureProduct Specification
Adjustable Inhalation
?This feature allows the diver to adjust the inhalation setting from the set level and increase the effort required to open the 2nd stage valve to deliver air.
Adjustable Venturi
?The venturi control affects how air flows in the 2nd stage. In it's positive position the flow of gas creates a vacuum against the diapragm, helping to open the valve. In it's negative position it will divert gas back against the diaphragm helping to close the valve. It is basically used to help prevent free flowing.
Cold Water Rated
?Cold water has adverse effects on regulators and can cause some to freeze so each regulator combination must be tested during manufacturing for their performance in different water temperatures.

Cold water is defined by EN250 as below 10°C. If a regulator combination cannot meet the performance standards below 10°C then they are only suitable for warm waters.

EN250 / (EN250A >10°C)
To pass the regulator must provide at least 62.5 L/min of air at 50M depth above 10°C.
Cold & Warm Water
Environmentally sealed
?Environmentally sealed 1st stages offer greater protection against freezing when diving in cold water (below 10 degrees C)

Scubapro have a new method of cold water proofing their first stages called the eXtended Thermal Insulating System or XTIS which still allows water into the first stage but the internal parts that come into contact with the water are coated to prevent ice from forming.
First Stage
?Unbalanced regulators are affected by the pressure in the cylinder, becoming slighty harder to breathe from when the pressure starts to drop.

Balanced regulators are not affected by the cylinder pressure or depth.

Over-balanced regulators achieve unprecedented performance by increasing your air supply the deeper you go providing the best breathe for deep divers.
High Pressure Ports
?High pressure ports supply the pressure gauge and wireless transmitters for dive computers
Low Pressure Ports
?Low pressure ports supply the 2nd stages and inflator hoses
Second Stage
?An Unbalanced second stage is simply a lever operated valve that is opened and closed as the diaphragm is pulled inwards by the vacuum that is created when the diver inhales. An unbalanced second stage is affected by increased pressure at depth, slightly increasing the effort required to open the valve.

A Balanced second stage overcomes the effects of increased pressure by utilising a balancing chamber. This chamber takes some of the work away from the spring mechanism, allowing a smaller spring to be used which results in an easier breathe. As the chamber uses air to balance the valve it maintains the same resistance as the diver descends and ascends, keeping the inhalation effort the same.
Service Information
?All regulators need to be serviced to keep them in working order as the parts inside them age and wear over time and with use. Most regulators need to be serviced once a year or after 100 dives with normal recreational use to replace parts and re-balance.

Some regulators use more modern materials or mechanisms that allow them to extend the servicing interval that can save you some money in the long run.
2 Years - 300 Dives
Weight in Grams (approx)
?The weight includes the first stage (DIN fitting), hose and second stage.

We offer free standard delivery on orders over £50.

Standard delivery is £3.70 for orders under £50. You will receive your order 2 - 4 days from the date of despatch.

Next Working Day is £6.95.

For Christmas delivery information, click here Learn more about delivery

We hope you will be completely satisfied with any product purchased from Simply Scuba.

However, you can return it for any reason within 28 days from the date of despatch for a full refund (less postage costs).

For Christmas returns information, click here Learn more about returns
average rating 5.0 out of 5
Based on 4 reviews
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100% of reviewers would recommend this product to a friend
4 Reviews
Rated 5 out of 5
Review posted


You get exactly what you pay for, the performance of a Ferrari with the comfort of Rolls Royce, if you can afford the outlay you will not be dissapointed

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Rated 5 out of 5
Review posted

These superbly built regulators deliver...

These superbly built regulators deliver in spades (and then some). Beautifully crafted, these regs are a joy to dive. I've used lots of regs but they don't come anywhere Atomic and they are superb in cold water too. Well worth the investment.

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Rated 5 out of 5
Review posted

Mine has just arrived

Mine has just arrived, 3 days delivery to Sweden, Excellent. The reg itself is a work of art, fantastically made, if it breathes half as well as it is put together I will be a very happy bunny.

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Rated 5 out of 5
Review posted

Was a little dubious about the price at...

Was a little dubious about the price at first but, i have to say that you are certainly getting what you pay for here! Like an angel tickling your tongue. A well made,lightweight,easy to use bit of kit.The comfort swivel is a nice touch and the ease

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