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About Poseidon Cyklon 5000 Metal Regulator, DIN

The first regulator in the world with only one hose and the demand valve situated at the mouth, this was presented in 1958 and set a new world standard for diving regulators. Still this regulator beats most other regulators on the market with some considerable ease. The German Navy and many others still have the Cyklon regulator as their first choice, thanks to the well-tested construction and design. It has been out in the field for over 45 years and experienced most of the things that can happen under the surface.

The First Stage is a Balanced Diaphragm Design. The diaphragm membrane transmits the pressure changes to the internal mechanism eliminating the need for the surrounding water to enter the intricate mechanism. The benefit of this type of first stage design is that none of the internal parts are exposed to contaminants such as salt, sand, chlorine or pool acids. These environmental contaminants cause corrosion and mineral deposits to form on the internal mechanism deteriorating regulator performance. The standard Diaphragm Regulator does allow water into the mainspring chamber so that the diaphragm can perform this transmission of pressure changes. The First Stage has 4 Low Pressure (LP) and 2 High Pressure (HP) Ports and is made from Durable Corrosion Resistant Chrome Plated Brass.

The Cyklon Second Stage is a Reliable Downstream Demand Valve Design. The Second Stage Housing is made from Corrosion Resistant Chromed Brass, Stainless Steel and Chromed Brass. The Regulator System uses NITRIL O-Rings and is EN250 Approved for Cold Water Air Diving. The CYCLON Regulator has also been tested by the US Navy, comes with a 27.6" (70 cm) LP Hose, comes with an Owner's Manual and is covered by a 24 month limited warranty.

Warranty Information

This product has a limited warranty of 24 months.


Poseidon Cyklon 5000 Metal Regulator, DIN Features

  • First Regulator in the World with Only One-Hose
  • Introduced in 1958 and Set a New World Standard for Diving Regulators
  • Approved to EN250 Cold Water Standard
  • Hose Length: 27.5" (70 cm)
  • Designed for AIR Use
  • Owner's Manual
  • 2 Year Limited Warranty
  • 1st Stage Regulator: Poseidon CYCLON
  • Balanced Diaphragm Design
  • Requires Less Maintenance than Piston Designs
  • 2 HP and 4 LP Ports
  • Chrome Plated Brass Construction
  • 2nd Stage Regulator: Poseidon CYCLON 5000
  • Reliable Downstream Demand Valve Design
  • Use Either-Way-Up
  • Materials: Durable Chromed Brass Housing with Brass and Stainless Steel Mechanism and Rubber Parts
  • Automatic Venturi Assist and Inhalation Control

Poseidon Cyklon 5000 Metal Regulator, DIN Customer Reviews Powered by TurnTo®

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may be safe, but high breathing effort


I bought one of these when they were on clearance from a dealer who was dropping them. The design has been around forever, and as you probably know this was the first one hose regulator on the market. Its age tells though, the breathing effort is much higher than a modern design such as a scubapro or atomic. For the money, I'd go with one of the later brands. I'm sure the newer Poseidon regs are great, but the Cyklon is well past its prime in my opinion.

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