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Poseidon XSTREAM Deep MK3 DIN Regulator, Black

SKU: POSXR MFR: 0100-000

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About Poseidon XSTREAM Deep MK3 DIN Regulator, Black

This is the regulator of choice for any demanding divers that dive with Air, Tri-Mix, 100% Oxygen and Nitrox and want a regulator that can do it out of the box. Regulator is even certified for 95% Helium mixes. Outstanding performance and certified to 656' (200 meters)! The XSTSTREAM Deep MK3 second stage is a high-flow design providing 76 standard cubic feet per minute (SCFM) flow of gas (2,150 liters per minute). The 2nd stage regulator uses an upstream servo-valve design with a safety valve opening pressure of 261 +/- 14 psi (18 +/- 1 bar) relief pressure. The second stage has a durable PVC housing with metal mechanism and rubber parts. The regulator has an automatic Venturi assist and inhalation control.

The first stage is a balanced rolling diaphragm ball valve design producing extreme leak tightness. Conventional designs are sensitive to war, misalignment, and manufacturing precision. A ball valve always finds its correct place. Combined with the 2nd stage, the enormous capacity of the 1st stage make the regulator meet the EN 250 breathing performance requirements even at as low as 232 psi (16 bars) cylinder pressure. This means that you gain an extra 493 psi (34 bars) of Gas compared to most other regulators! The 1st stage construction requires less O-rings than any other regulator. The hose routing is developed to be optimized for a redundant system, using two-regulators. The HP ports are positioned to accommodate the use of gas monitoring computers e.g. first stage mounted HP sender/receive unit.

The 1st stage has a built-in Poseidon T.D.A, Thermo-Dynamic Anti-Freeze, which requires no maintenance. It is always there, doing the job. It is thermodynamically-protecting the parts which must not freeze. It is identified by the large slots in the cover, allowing the heat energy of the water to reach the spring. The Cold from the inside is consequently insulated from the spring, via an insulation barrier and insulating diaphragm. It is constructed without compromise to any detail to prevent cold reaching the sensitive area. Using Poseidon T.D.A, a regulator can free-flow air in fresh water of 32ºF (0ºC) for at least 10 minutes and afterwards still be completely unaffected. The 1st stage regulator is manufactured from chrome plated brass. Regulator system comes complete with a 27.6" (70 cm) LP hose. The XSTSTREAM Deep Mk3 comes with a neck strap, and owner's manual.

Warranty Information

This product has a limited warranty of 24 months.


Poseidon XSTREAM Deep MK3 DIN Regulator, Black Features

  • Poseidon XSTREAM Deep MK3 DIN Regulator
  • Designed for Air, Nitrox, 100% Oxygen or TRIMIX Out of the Box"
  • Approved to EN250 Cold Water Standard
  • Hose Length: 27.5" (70 cm)
  • Owner's Manual
  • 1st Stage Regulator: Poseidon XSTREAM
  • Balanced Rolling Diaphragm Ball Valve Design
  • Extreme Leak Tightness
  • Less O-Rings than Any-Other Regulator
  • Optimized Hose Routing Configuration
  • HP Ports Positioned to Accommodate Gas Monitoring Computers: Transmitters
  • Built-In Poseidon Thermo-Dynamic Anti-Freeze (T.D.A.)
  • T.D.A: Thermodynamically-Protecting Parts which Must-Not-Freeze
  • 2 HP and 5 LP Ports
  • Chrome Plated Brass Construction
  • 2nd Stage Regulator: Poseidon XSTREAM
  • Super High-Flow Design
  • Flow Rate: 76 Standard Cubic Feet per Minute (SCFM) Flow of Gas (2,150 liters per minute)
  • Safety Valve Opening Pressure of 261 +/- 14 psi (18 +/- 1 bar)
  • Upstream Servo-Valve Design
  • Materials: Durable PVC Housing with Brass and Stainless Steel Mechanism and Rubber Parts
  • Automatic Venturi Assist and Inhalation Control

Questions & Answers Powered by TurnTo®

Questions about this item:

Jake G  Is this the one that is all black ? Even the first stage ?
Donald M  No. This is the Xstream Deep Mk3 Black. Poseidon part number 0100-000. The all black model with the black first stage is called the Xstream Black. Poseidon part num,ber 0100-010. They are functionally identical according to Poseidon.
pete b  if you look at the pic, its chrome plated 1st stage. check with them if it matters to you on the 1st stage. I bought 2 and on 1 of them, the chrome scratched a lot from use...banging on the boat, scratched in cement rinse tub in Bonaire.
Steve S  No, the one that is all Black is the new titanium set up.
mark w  can you switch back and forth between air and nitro with this regulator, or does it need to be dedicated to one or the other?
Steve S  The regulator works with both.
Shopper  Certified to 200 meters? What exactly does that mean? Can this regulator actually go deeper than 200 meters,say 300 meters?
DENNIS Z  You can't go to 300 meters you would die. this is a great reg for ice diving and deep. I have had mine to 145 feet and there is no drop in pressure. It's not super comfortable but I wouldn't use anything else. most tech divers go to 300 feet or so. not 600 feet.
Karl Z  What I meant to say was performance wise. The Mares Abyss was tested to a depth of 313M on a world record dive. Can this regulator go as deep as the Abyss regulator? Just curious,since this setup seems to be certified to only about 200 meters if I'm not mistaken.
pete b  I doubt anyone would come back from 200 meters using anything regardless if the reg will perform at that depth. A reg is life support gear. We all have different results and different physiological conditions. Mine delivers air as required. When kicking hard or for extended times, the reg provides me with ample air. I have not had that "out of breath" feeling when exerting myself using this reg. Your results may vary. Check on where you can get it serviced in your area.
Steve S  The Poseidon Poseidon XSTREAM Deep MK3 DIN Regulator, can go comfortably to 300m. It performs beautifully!
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