Overview
Lightweight, high performance second stage. The ATMOS Sport has many of the high-performance features of the ATMOS Pro with the exception of the 2nd stage adjustment knob and pneumatically balanced valve design . This regulator is ideal for the diver who wants high performance without having to manually adjust the 2nd stage while diving.
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Conventional second stage without diver adjustment
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Adjustable venturi switch
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Nitrox compatible to 40%
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Paired with your choice of the new AT400 Over-Balanced Diaphragm First Stage featuring DVT (Dry Valve Technology)
AT400 First Stage
High performance over-balanced diaphragm first stage with environmental seal and the added protection of DVT (Dry Valve Technology).
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4 LP ports, 2 HP ports for maximum hose placement
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DVT eliminates corrosion of critical internal components, bacteria, hose deterioration, and damaged gauges and computers.
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Nitrox compatible to 40%
NEW! AERIS ADVANTAGE LIMITED LIFETIME REGULATOR PARTS REPLACEMENT PROGRAM
The AERIS ADVANTAGE Program provides free standard replacement parts for your AERIS regulator. The program includes all AERIS first stages and second stages. Register your regulator online with AERIS, and you are automatically enrolled in the program. There is no additional charge for this program.
Register today!
Features
DVT (Dry Valve Technology)
A patented design that puts an end to flooded regulators without sacrificing performance! DVT is a revolutionary regulator technology designed to automatically prevent moisture and contaminants from entering your first stage, even if the dust cap is left off. Find out more
Adjustable venturi switch
The adjustable deflector vane found in the AT400 Sport diverts airflow from the valve directly to the mouthpiece, producing smooth venturi-assisted inhalation. With the addition of a user-adjustable venturi system, full adjustment control rests in the hands of the diver.
Computer optimized design
AERIS regulators are exclusively designed using the latest 3-D computer modeling techniques. This allows us the ability to model and test performance while still in the early stages of development. The AT400 Sport's unique deflector vane and housing design diverts airflow from the valve directly to the mouthpiece, producing smooth venturi-assisted inhalation.
Lightweight
The AT400 Sport's housing is made from an ABS/Polycarbonate composite blend of materials making the AT400 Sport both extremely rugged and lightweight (5.4 ounces) and nearly neutrally buoyant underwater, reducing jaw fatigue on extended dives. The extremely ligweight cover ring is machined from a solid piece of aircraft aluminum, and then hard anodized, utilizing a unique process to prevent corrosion.
Patented orthodontic mouthpiece
To further reduce jaw fatigue, the AT400 Sport features a patented Orthodontic Mouthpiece, designed to accommodate the natural overbite of the human jaw.
Nitrox Compatibility
The AT400 Sport is classified as being suitable for use with nitrox breathing gas mixtures containing up to 40% oxygen by volume without the need for special preparation, cleaning or component parts.
Specs
| |
Valve Type | DEMAND |
Adjustment | VENTURI SWITCH |
Balancing System | N/A |
Integrated Purge Button | YES |
Mouthpiece | ORTHODONTIC |
Nitrox Compatibility | STANDARD TO 40% |
Ambidextrous | NO |
Integrated Swivel | NO |
Weight (without hose) | 7 OUNCES |
Dimensions (front profile) | 2.67 INCHES |
First Stage Configuration | ATMOS |
Minimum Cracking Effort | 1.1 CIW* |
Factory Set Inhalation Effort | 1.2 - 1.4 CIW* |
| .96 JOULES |
Warranty | 2 YEAR |
FEATURES & FUNCTIONS | AT 400 FIRST STAGE |
Valve Type | BALANCED DIAPHRAGM |
Primary Material | MARINE BRASS |
Low Pressure Ports | 4 |
High Pressure Ports | 2 |
Integrated Swivel | NO |
Nitrox Compatibility | STANDARD TO 40% |
300 BAR DIN Fitting | OPTIONAL |
Sealed Valve Design | YES |
Environmental Protection | YES |
Weight | 29 OUNCES |
Factory Set Intermediate Pressure | 138-143 PSI |
DVT (Dry Valve Technology) | YES |
Warranty | 2 YEAR / LIFETIME PARTS |
WORK OF BREATHING Did you know that it costs energy to breathe? The amount of energy your regulator requires to move each liter of air is called work of breathing (WOB). Lower work of breathing equals lower effort required to breathe and increased comfort and safety during a dive. How to Read Work of Breathing Charts
The computer-generated breathing machine chart presented above represents a regulator's performance per standards established by the U.S. Navy's Experimental Diving Unit. Tests are conducted at 198 feet with approximately 3000-psi supply pressure, 25 breaths per minute of 2.5 liters each.
(1) Inhalation - The chart shows one complete breath cycle, starting with inhalation on the left and continuing along the bottom to the right, staying mostly below 0.0; thus the inhalation work of breathing is reported in negative numbers.
(2) Exhalation - The exhalation effort begins on the right and runs across the top to the left. These are all positive numbers since a diver (or the machine in this case) is blowing out (exhaling) rather than inhaling.
(3) WOB - The total area inside the loop formed by the two lines is what the computer analyzes to calculate the regulator's total work of breathing - the amount of energy the regulator requires to move each liter of air.
*Column Inches of Water
Compare
NOTE: The document listed below is for reference only. For specific operational details, consult the original paper documents included with your Regulator.
Regulator Comparison Chart.pdf
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Manual
NOTE: The document listed below is for reference only. For specific operational details, consult the original paper documents included with your Regulator.
Regulator Owner's Guide - 12-7143-r02.pdf
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