MK2 Plus / R195 NITROXHomeRegulatorsMK2 Plus / R195 NITROX

MK2 Plus / R195 NITROX
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Technical Information

MK2 Plus Nitrox First Stage

  • Classic downstream piston
  • Chrome plated brass body
  • Low pressure ports: 4
  • High pressure ports: 1
  • Tank connection: Dedicated EN 144-3 300 bar
  • Weight: 552g / 19.5oz
  • Air Flow at 200bar: 2600 l/min - 92 SCFM
  • Intermediate pressure: 8.5-9.8 bar / 123-142 psi
  • Nitrox compatible up to 100% Oxygen

R195 Nitrox Second Stage

  • Classic downstream valve
  • Diver-adjustable Venturi-Initiated Vacuum Assist (VIVA)
  • Super-flow hose
  • Super Comfort High Flow mouthpiece
  • Metal valve housing
  • Weight: 198g / 7.0oz
  • Air flow at 200 bar: 1400 l/min - 50 SCFM
  • Maximum low pressure: 14 bar / 203 psi
  • Nitrox compatible up to 100% Oxygen

The MK2 Plus/ R195 system and R195 Octopus are also available in a dedicated Nitrox version.  For simplicity and top reliability, they have been developed in compliance with the most stringent safety norms.

MK2PLUS first stage in a Nitrox compatible configuration satisfies both advanced and recreational divers within the EU.

  • Owning a SCUBAPRO dedicated Nitrox regulator means you can safely dive using oxygen enriched air with over 21% and up to 100% oxygen concentration at a maximum working pressure of 200bar, in full compliance with EU norms EN 13949:2004 & EN 144-3:2004 for breathing devices.
  • SCUBAPRO Nitrox dedicated first stages have specifically designed connections for Nitrox tank valves, which differ from the connections for compressed air tanks. This ensures utmost safety and no risk contaminating Nitrox with potentially hazardous hydrocarbons or residues.
  • Our Nitrox systems only use approved and specific oxygen compatible components (HP seat, O-rings, washers and grease) required for high pressure oxygen systems for guaranteed safe diving.
  • SCUBAPRO Nitrox regulators are assembled in a dedicated environment with the required level of cleanliness for oxygen compatibility.
  • Nitrox regulator systems are easily identifiable with green & yellow color accents.
The R195 is a new design based on the heritage of the classic R190 second stage, re-engineered with modern features and materials. The R195 combines a classic downstream valve with a large diaphragm and classic purge button. Its simple and robust construction offers the utmost in reliability and makes the R195 the ideal second stage for new divers and a perfect choice for deco tanks thanks to its reversible hose attachment.

WARNING: You must be fully trained and certified by a recognized diving training agency in order to dive with oxygen enriched air (Nitrox breathing mixtures). Diving with Nitrox without such certification could lead to death or serious injury.

WARNING: if a Nitrox dedicated SCUBAPRO regulator has been used with standard compressed air from a non-filtered source it is then compulsory to perform a new maintenance and conform with the cleaning procedure specifically designed for the use of Nitrox mixes and carried out by an authorised technician, before using them again with  Nitrox.


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WARNING: When diving, you must follow the rules and apply the skills taught by a recognized scuba diving certification agency. Before taking part in any diving activity, it is mandatory to have successfully completed a scuba diving course. Information on this website does not replace a diving instruction course.