Top Rated Gear

Atomic Aquatics B2 Sealed Regulator Yoke

SKU: ATMB2SS MFR: 03-0027-6P

Key Features

  • Enjoy balanced performance at any depth with this regulator's pneumatically-balanced second stage
  • Dive confidently in cold water; this Atomic Aquatics regulator is built to withstand challenging conditions
  • Customize your dive with the adjustable second stage, featuring a user-friendly flow control knob
  • This compact and lightweight Atomic Aquatics B2 regulator is perfect for travel, weighing just 2.5 pounds
  • Nitrox ready: Dive safer with this regulator, compatible with up to 40% oxygen mixtures
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Q&A

Questions & Answers

MARK F : What is the difference, practically between sealed, and not sealed. Don't any advantages of being sealed disappear after it is opened up for it's first servicing?MARK F : Thanks for you answerJUNE H : If you dive primarily in cold waters, you need to make sure that the regulator youâ??re getting at least meets the European Standard for cold water regulators (as defined by EN250), which means that the regulator has been certified for use in water as cold as 2 to 4 degrees Celsius (35.6 â?? 39.2 degrees Fahrenheit). If the manufacturerâ??s documentation indicates that it meets US Navy Standards, thatâ??s even better. Those standards indicate that the regulator has been certified in waters as cold as 28 â?? 30 degrees Fahrenheit (-2.2 to -1.1 degrees Celsius). Design methods for achieving cold water certification vary, but in general it involves sealing the first stage and using a heat sink on the second stage to recapture some of the heat in the diverâ??s exhaled breath. If youâ??ll be diving in waters that are silty, sandy, or high in dissolved solids, youâ??ll want to get a regulator with environmental sealing as a feature. Your regulator will be resealed after being serviced. NICHOLAS L : The 1st stage is sealed not the reg. Prevents water from entering when switching out tanks.KURT G : As far as I know, it has to be resealed again. The sealed reg is for diving in cold weather and helps prevent the reg from freezing. At one point I was diving in a quarry with temps running about 46F which is pretty freakin cold. I don't do it regularly but thought why not be prepared if I do it again. Hope that helps.RICHARD W : No, when the first stage is serviced (and thoroughly cleaned) it is resealed and reassembled.MAVERICK K : When they say sealed all they mean is that the first stage has a filter inside when your remove the dust cap no small debris can get in. My Oceanic FDX is a sealed reg, for the little extra money I think its worth it and it also depends with how well you taker care of your reg. I am very meticulous with all my regs , its your lifeline , even when I do live aboards or charter boat dives I always politely ask the crew if I can attach my reg to their tanks. Ask fa as Atomics , BUY It !!!! That's how great their regs are, I went with the B2 and was gonna buy the T3, until I found out that the T3 still has brass internals and the only Titanium was the exterior of the reg, titanium internals is not Nitrox compatible and that's why the T3 is basically the same as the B2 . Hope this helps, and by all means if you have the money buy the T3 sealed its their top of the line unit !!!! Safe diving my friend - Maverick Hawaii Diver
Pearl V : whats the difference between the ST1 and the B2?GREGORY T : About $200. Not enough info here to tell. I can tell you I've used a B2 with a M1 backup for 4 1/2 years in 30 degree freshwater and 85 degree salt water to depths I should not have been at. I've had a dozen regs. The B2 IS THE BEST. Save yourself some cash. G.
Shopper : Why Did You Choose This?Brian S : Warranty and service

Reviews about this item

Review Summary

2020-05-14T01:46:17

Rated 5 out of 5

Best Quality

As an instructor I only want the best quality for me and my students. That is where Atomic B2 reg comes in. I primarily use this reg for teaching and have it on my long hose for sidemount. It is easy to breath at deeper depths (100- 130 ft). This reg can be used from the nice warm waters of the Florida Panhandle to the coldest quarries.

Peter J.

2019-07-29T03:50:16

Rated 5 out of 5

breathing is effortless

im really impress with this system the easy of breath combine with the swivel make it very conformable for those long dives.. it is also very nice the option of custom colors, for the second stage.

Chapur R.

2019-03-17T15:23:46

Rated 5 out of 5

Super reg

Love it. Replaced my 15 year old M1 with this. Love atomic!

Ronald W.

2018-11-01T14:53:17

Rated 5 out of 5

Best reg I’ve owned

Best reg I’ve owned. I’ve owned 6. Open your mouth and there’s the air. Zero breathing resistance. Swivel on side is awesome.

Charles H.

2018-08-31T12:57:11

Rated 2 out of 5

1st stage failed twice witnin 80plus dives

while i love my B2 regulator and how easy it breaths. i have major worries with my 1st stages. i managed to get maybe 34 dives out imof it in SW before the 1st stage blow a o ring. got it fixed and made it another 62 dives before failing on day 2 of a 7 day liveaboard. after the 1st time o tried getting it set to atomic bmto be check by experts that have. thry would not take it back. so the local dive shop had to fix it. 2nd time they agreed something was wrong. but wont tell me what or give a eta. looks likr i be going to a scubopro set up as i just have no faith in their 1st stage i always clean my rig after each dive trip, and if possiblr spray off my rig on liveaboards.

JEFFERY M.

2017-10-07T20:00:00

Rated 5 out of 5

Smooth operating

It took me a while to get used to the HP and LP ports with the unique cone shape, but i think there are benefits to that. I am 54" and found that this allows me to move my tank slightly higher and not hit my head, this way the tank isnt going mid thigh, which is important to me. It is very easy to breath regardless of where i set the dial. On the surface it purges the air in a second flat, no waiting for all the air to purge before removing the reg. I use the mouthpiece that it came with and its a tad more difficult to get it set in my mouth, but no jaw fatigue whatsoever. Very light weight, and i think i will enjoy long dive more.

markg

2016-06-20T09:20:05

Rated 5 out of 5

BEST REGULATOR YOU CAN BUY

i bought my regs, a Z2 and a B2 several years ago and diving in fresh water and an ocassion salt water dive they worked perfect, easy breath very dependable, several years ago I moved to the Philippines and in two years I completed over 500 dives, the Regs still work great and no problems except a few leaks on my Z2 1st stage and my B2 worked great, I had them service, the tech said he didn't know how they could work so good the inside of the 1st stage was very bad and the second stages the same, the salt water did its toll on them but he rebuilt them and they both work great again. I love my Atomics and wouldn't dive with anything else Best Regs on the market.

ORVILLE M.

2013-12-22T19:00:00

Rated 5 out of 5

Very very good Reg!

It's could offer you very lightly bite it for breath.So you won't fell tired of your mouth.Light,beautiful!!! I really like it.

LUKE

2013-09-07T20:00:00

Rated 4 out of 5

Great breather!

With second control valve open it free flows easily. Close to correct. Fast breather even if supporting two divers!

Mike

2013-09-04T20:00:00

Rated 5 out of 5

" BY FAR THE BEST REG USED"

In short, I have done 1000's of dives and used dozens or high end and low end regs, some of the low end regs in my opinion out perform some of the high end ones,fuethermore the Atomics B2 is my favorite, I really wanted the T-3 but it was out of my budget window and yes the T-3 has a Titanium Exterior but the inside parts are still brass, Titanium and EANx is not compatible, in other words if you have the $$$ and want to be the most fasionable diver underwater by all means go with the T3

hawaiidiverbigisland

2011-12-20T19:00:00

Rated 5 out of 5

great reg.

This is a great regulator, breaths great at all depth(been down to 100) swivle works great, I had no trouble with it free flowing at all. Its light and felt no jaw fatigue of any kind and the mouth peice is very nice. I cant say one bad thing about this reg. Its the best reg Ive ever owend.

jonm

2011-10-01T20:00:00

Rated 5 out of 5

Atomic

I needed two high pressure for my transmitter and my gauges. The Atomic had two high pressure and five low pressure. Plenty for my octos,BC,and dry suit. Im completely satisfied with the 1st stage reg. Really nice REG.

JamesL

2008-05-20T20:00:00

Rated 5 out of 5

It's an Atomic!

This regulator has performed excellent at depths up to 300fsw.

Rick

2008-05-13T20:00:00

Rated 5 out of 5

THE BEST EVER

BEST REG I OWN...

NANDO

2008-04-09T20:00:00

Rated 5 out of 5

Best Reg I've used

This is by far the best reg I have used, light in the mouth and easy on air you really don't notice it's there at all. The swivel feature also means when you turn your head it doesn't tug at your jaw. I've used many brands and styles of regulator and if you're willing to spend a little bit of extra money you won't be disappointed by this one!

Scott

2008-03-07T19:00:00

Rated 5 out of 5

A breath of fresh air...

The Atomic B2 Regulator is sweet! It's light, breathes like you were relaxing at home, titanium makes care a breeze, warranty is lifetime and its service interval is 2 years or 300 dives!!! The swivel ball on the attachment to the second stage makes it feel like the reg isn't even there. Bubbles...what bubbles? The reg delivers your bubbles far off to the side. The optional extender is definitely not needed. The Atomic B2 Regulator is the most solid, comfortable reg I have ever used. Aloha!!!

Aloha M.

2008-01-22T19:00:00

Rated 5 out of 5

Great regulator,easy breathing

This is my every-dive regulator,I love it.

Willy

2007-09-24T20:00:00

Rated 5 out of 5

Best reg I ever owned!

Great swivel, No dry mouth, Very comfortable.

Large W.

2007-07-14T20:00:00

Rated 5 out of 5

If you want the best........

I got this reg before my trip to Cozumel...It performed flawlessly. You will forget you have it in your mouth. The swivel on the second stage is awesome, it allows you full movement without pulling on the reg. Great buy

Jared w.

Atomic Aquatics B2 Specifications

  • 1'st Stage Type

    Balanced Flow-Through Piston

  • LP Ports

    Five 3/8" Ports

  • HP Ports

    Two 7/16" Ports

  • Adjustable 2'nd Stage

    Yes, Flow Control Knob

  • Nitrox Compatible

    Yes, Up to 40%

  • 2'nd Stage Type

    Pneumatically-Balanced

  • Regulator Materials

    First-Stage: Chrome Plated Brass & 316-Grade Stainless Steel
    Second-Stage: Demand Valve Body Zirconium Plated Brass
    Lever & Sealing Orifice Titanium

  • Hose Thread

    3/8"

  • Hose Length

    32" (81.3cm)

  • Total Weight

    2.5 lbs. (1,143 g)

  • UPC Code

    882689087479

6 Accessories for Atomic Aquatics B2 Sealed Regulator Yoke

  • All Accessories (6)
  • Regulator Accessories (6)

About Atomic Aquatics B2

FEATURED REVIEWS

" BY FAR THE BEST REG USED"

By hawaiidiverbigisland

In short, I have done 1000's of dives and used dozens or high end and low end regs, some of the low end regs in my opinion out perform some of the high end ones,fuethermore the Atomics B2 is my favorite, I really wanted the T-3 but it was out of my budget window and yes the T-3 has a Titanium Exterior but the inside parts are still brass, Titanium and EANx is not compatible, in other words if you have the $$$ and want to be the most fasionable diver underwater by all means go with the T3

Best Reg I've used

By Scott

This is by far the best reg I have used, light in the mouth and easy on air you really don't notice it's there at all. The swivel feature also means when you turn your head it doesn't tug at your jaw. I've used many brands and styles of regulator and if you're willing to spend a little bit of extra money you won't be disappointed by this one!

Introducing the Atomic Aquatics B2 regulator, designed for ultimate comfort as the successor to the renowned Atomic Aquatics B1. Celebrated for its performance and ergonomics, the B2 shares the first and second stage design of the T1, but with an all-titanium second stage and a compact, high-performance chrome-plated brass and type 316 stainless steel first stage.

Featuring a balanced flow-thru piston with Atomic Aquatics' jet seat high-flow stainless steel piston and an exclusive self-lubricating high-pressure seal system, the B2 ensures low friction and maintenance. The innovative conical seat and blunt end piston design offer exceptional reliability, allowing for 2 years or 300 dives without service. Experience superior diving performance, even at low tank pressure.

The B2's factory-sealed first stage provides freeze protection and prevents contamination. Nitrox ready for up to 40% mixtures, the first stage includes 2 high-pressure and 5 low-pressure ports.

The B2's second stage boasts a balanced linear flow design for easy breathing at all depths and conditions. Built with a titanium demand valve body, lever, and sealing orifice, as well as a high-quality silicone rubber diaphragm, this pneumatically-balanced poppet second stage features Atomic Aquatics' patented seat-saving dynamic orifice for extended seal life.

Enjoy Atomic Aquatics' patented automatic flow control (AFC) and the comfort swivel, allowing for 30 Degree rotation without binding or kinking. The regulator also includes a 3/8" threaded 32" low-pressure hose, weighs 2.5 lbs., and comes with an owner's manual.

Atomic Aquatics B2 Features

  • Atomic Aquatics B2 Sealed First Stage Regulator:
  • Nitrox Ready for Mixtures Up to 40% Out-of-the-Box
  • 3/8" Threaded 32" (81.3cm) Low Pressure Hose
  • Weight: 2.5 lbs. (1,143 g)
  • Owner's Manual
  • First-Stage:
  • Chrome Plated Brass and 316-Grade Stainless Steel
  • Balanced Flow-Thru Piston Design
  • Atomic Aquatics Jet Seat High-Flow Piston
  • Exclusive High-Pressure Piston Seal System is Self-Lubricating
  • Self-Lubricating for Low Friction and Low Maintenance
  • No Sharp Edges: Conical Seat and Blunt-End Piston
  • Precision Machined from an Extremely Strong Aerospace Specification Seat Material
  • Most Reliable Seat System in the Industry
  • Seat System: 2-Years or 300 Dives w/o Service
  • 2 High-Pressure (HP) 7/16" Ports
  • 5 Low-Pressure (LP) 3/8" Ports
  • LP Port Swivel Turret for Ease of Hose Routing
  • Second-Stage:
  • Balanced Linear Flow Design
  • Pneumatically-Balanced Poppet Second-Stage
  • Built-to-Last: Titanium Demand Valve Body, Lever and Sealing Orifice
  • High Quality Silicone Rubber Diaphragm
  • Second-Stage Orifices, Floating Valve Design
  • Atomic Aquatics Patented Automatic Flow Control (AFC)
  • Unique Diaphragm Activated Vain Automatically Controls the Flow and Venturi-Effect
  • Optimum Breathing Resistance at All-Depths
  • Rapid Adjustment Knob for Rare Special Situations
  • Atomic Aquatics Comfort Swivel: 30 Degree; Rotational Movement without Binding or Kinking

Warranty Information

This product has a limited lifetime warranty.

Key Features

  • Enjoy balanced performance at any depth with this regulator's pneumatically-balanced second stage
  • Dive confidently in cold water; this Atomic Aquatics regulator is built to withstand challenging conditions
  • Customize your dive with the adjustable second stage, featuring a user-friendly flow control knob
  • This compact and lightweight Atomic Aquatics B2 regulator is perfect for travel, weighing just 2.5 pounds
  • Nitrox ready: Dive safer with this regulator, compatible with up to 40% oxygen mixtures

What's in the box:

  • 1'st and 2'nd Stage Regulators
  • Low Pressure Hose and Owner's Manual