Even though the use of multi-layer chrome plated Brass for the body of the first stage is a more conventional material choice... the performance of the B2 is truly superior to any other rival. Atomic designed our signature breathing performance into the B2 to give a diver the perfect combination of comfort, style and value. The main design difference? The total weight of the B2 is only 9 ounces more than the T2.

Virtually identical performance as the T2 with a Brass First Stage

The B2 gives divers an close alternative to the all-Titanium T2. The signature Atomic breathing performance is nearly identical. The B2 is ergonomically designed to be the world’s most comfortable second stage just like the T2. The key difference is the chrome-plated Brass body of the B2 first stage, which is more economical without sacrificing performance. That’s why the B2 has garnered more awards from independent tests and reviews than any other regulator on the market.

FEATURES

1st STAGE

• First stage materials are chrome-plated Brass and 316 Stainless Steel
• Atomic Jet Seat high-flow piston first stage
• Optional factory-sealed first stage to prevent outside contamination such as silt and sand and prevent freezing
• 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
• Patented Atomic Seat Saving Orifice
• Patented Atomic Automatic Flow Control (AFC)
• Rapid adjustment knob for manual second stage de-tuning in special situations
• Polished 316 Stainless Steel Atomic Comfort Swivel
• A new high-flow second stage case that significantly 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

The MK11/C370 is a great choice for dive-trekkers. The balanced diaphragm MK11, with its chrome-plated brass body specially designed to reduce size and weight, is an ideal travel companion. Its system features internal parts that are sealed from the elements. The new C370 brings forth the best features of its predecessor, the C350, while adding a balanced valve to its design. Its new exhaust tee, based on the S620 Ti’s design, contributes to a 10% improvement in work of breathing over the C350. With this regulator system in your dive bag you’ll be ready to hit the water.

FEATURES

• Air-balanced diaphragm first stage design delivers constant and effortless airflow unaffected by depth, tank pressure, or breathing rate.
• Marine grade brass body has sealed internal parts to prevent water and pollutants from fouling the inner mechanism while enhancing cold-water performance.
• Two high pressure, two low pressure and two high-flow LP ports maximize hose routing options.
• External intermediate pressure adjustment enables technicians to fine-tune performance quickly and easily.
• Air-balanced second stage valve smoothes out the inhalation effort at varying depths and supply pressures.
• Compact second stage fiberglass reinforced nylon casing with new exhaust tee takes up little space in a dive bag.
• User controls include a diver-adjustable inhalation effort knob and coaxial dive/pre-dive lever.
• Large purge button is easy to activate, even wearing thick gloves.
• Super-flow hose features an oversized bore that allows more air to flow on each inhalation.
• Compact Hi-Flow mouthpiece improves airflow as well as mouth comfort, fitting all mouth sizes.

SPECS

Technical divers will love the solid breathing performance and proven reliability of this notable regulator combo. The air balanced piston-style MK25 EVO is consistently ranked as the top-performing first stage on the market. The G260 is the most imitated air balanced second stage design of all time. Made with a rugged reinforced technopolymer casing and metal internal components to ensure excellent cold-water performance, it also offers a left-right hose attachment option, making it a great choice for tech diving configurations. Both first and second stages feature a Black Tech scratch-resistant coating that protects against the ravages of salt water and corrosion. It’s a workhorse system for the most demanding dive conditions.

FEATURES

• Air balanced flow-through piston in a Black Tech-coated brass body provides constant and effortless airflow unaffected by depth, tank pressure, or breathing rate.
• Durable Black Tech coating includes an inner layer of chemical Nickel (FDA approved) and an outer glossy DLC (Diamond Like Carbon) finish.
• Patented XTIS (Extended thermal Insulating system) thermally insulates the inner mechanism from the environment, improving cold-water resistance and delaying ice formation in extreme cold-water conditions without compromising breathing performance.
• Anti-freeze protection radically increases breathing reliability when diving in the most extreme water temperatures.
• Two opposing high pressure ports allow the first stage to be positioned either up or down.
• Four high-flow and one axial super high-flow low pressure ports on a swivel turret maximize hose routing options.
• External intermediate pressure adjustment enables technicians to fine-tune performance quickly and easily.
• Air balanced second stage valve smoothes out the inhalation effort at varying depths and supply pressures.
• Rugged reinforced technopolymer design features SCUBAPRO's largest second stage casing and diaphragm for the ultimate in breathing sensitivity, regardless of position in the water.
• Metal components (inlet tube, orifice, inhalation control knob and hose connector) increase resistance to freezing when diving in extreme conditions.
• A diver-adjustable inhalation effort knob fine-tunes air delivery to suit changing depths, water conditions and personal tastes, and a Venturi-Initiated Vacuum Assist (VIVA) dive/pre-dive switch prevents free flows in cold water or when used as an octopus.
• High-flow exhaust valve reduces exhalation for better overall breathing comfort, and the reversible hose attachment allows you to easily adjust hose routing for tech diving configurations.

SPECS

PRODUCT MANUAL

COMPATIBLE PRODUCTS:

1ST STAGE SILICONE GLOW PROTECTION

Protect your regulator so you can enjoy diving with it for years to come! The Regulator Bag is spacious and built for any model Atomic Aquatics regulator

FEATURES & SPECS

• Padded shoulder strap
• 1050 Denier
• DIMENSIONS: 16.5" x 11.5" x 5"
• CAPACITY: 1,129 cubic inches

ONLINE REVIEW:

Rating:  ROOMY! 
Reviewer: Ryan Wurtz 
This bag has more than enough room for one regulator set. I had enough room to store two ST1 regs, with ST1 octos, 2 wireless pressure transmitters, and backup analog pressure gauges. 

The “Z” designation is represented by the use of Zirconium as plating material for the precision machined Brass valve body. Atomic developed a Zirconium over Chrome over Brass plating process to deliver corrosion-resistance 3-4 times that of conventional chrome plating. The Z Series second stage lever, orifice and spring are Titanium.

Designing affordability doesn’t mean using shortcuts:

The Z Series is our most compact and economical regulator system. But its rare combination of performance, ergonomics and materials is unmatched by competitors at any price. The Z Series gives divers the assurance of the same Limited Lifetime Warranty as all Atomic regulators. The all-black styling of the Z3 makes a dramatic statement.

FEATURES

1st Stage

• First stage materials are chrome plated Brass and 316 Stainless Steel
• Atomic Jet Seat high-flow piston first stage
• Optional factory-sealed first stage to prevent outside contamination such as silt and sand
• Nitrox ready for mixtures up to 40%
• First stage ports available in  2 HP fixed / 7 LP on fixed cap

2nd Stage

• Second stage components are made of precision machined Brass with Zirconium plating and Titanium
• Z3 has a Black-PVD-coated Atomic Comfort Swivel
• Patented Atomic Seat Saving Orifice (Titanium)
• Patented Atomic Automatic Flow Control (AFC)
• Rapid adjustment knob for manual second stage de-tuning in special situations
• A new high-flow second stage case that significantly 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

VIDEO

When you team SCUBAPRO's flagship first stage with a second stage engineered to excel in harsh conditions, you get a system that any recreational or technical diver can take on any dive, anywhere in the world, and be assured of rock-solid performance and reliability. The MK25 EVO/G260 is just such a system. The MK25 EVO delivers an ultra-fast breathing response, great sensitivity and extra-high airflow, making it the ultimate do-it-all first stage for all water temperatures. The G260 is the most imitated air balanced second stage of all time. It features metal internal components and a left-right hose attachment option, making it a great choice for tech diving configurations and a consistent top-of-the-line performer.

FEATURES

• Air balanced flow-through piston in a chrome-plated brass body provides constant and effortless airflow unaffected by depth, tank pressure, or breathing rate.
• Patented XTIS (Extended thermal Insulating system) thermally insulates the inner mechanism from the environment, improving cold-water resistance and delaying ice formation in extreme cold-water conditions without compromising breathing performance.
• Anti-freeze protection radically increases breathing reliability when diving in the most extreme water temperatures.
• Two opposing high pressure ports allow the first stage to be positioned either up or down.
• Four high-flow and one axial super high-flow low pressure ports on a swivel turret maximize hose routing options.
• External intermediate pressure adjustment enables technicians to fine-tune performance quickly and easily.
• Air balanced second stage valve smoothes out the inhalation effort at varying depths and supply pressures.
• Rugged reinforced technopolymer design features SCUBAPRO's largest second stage casing and diaphragm for the ultimate in breathing sensitivity, regardless of position in the water.
• Metal components (inlet tube, orifice, inhalation control knob and hose connector) increase resistance to freezing when diving in extreme conditions.
• A diver-adjustable inhalation effort knob fine-tunes air delivery to suit changing depths, water conditions and personal tastes, and a Venturi-Initiated Vacuum Assist (VIVA) dive/pre-dive switch prevents free flows in cold water or when used as an octopus.
• High-flow exhaust valve reduces exhalation for better overall breathing comfort, and the reversible hose attachment allows you to easily adjust hose routing for tech diving configurations.
• Super-flow hose features an oversized bore that allows more air to flow on each inhalation.

SPECS

COMPATIBLE PRODUCTS:

1ST STAGE SILICONE GLOW PROTECTION