Poseidon Cyklon 5000 Regulator

A Review

Poseidon Cyklon 5000 Regulator Review


The brand Poseidon has long been known for its superior quality and versatility of gears for a long time now. This track record was imported into the Cyklon 5000 a versatile dynamism that makes it stand out among the lot of regulators from Poseidon. In this Poseidon Cyklon 5000 review, we will be discussing the admirable features and attributes of this antique regulator.

With the Cyklon 5000, a diver can use both (left and right) sides of the regulator without any fuss. This makes it a world-class dynamic and versatile regulator piece. Further, divers testing the Cyklon 5000 agreed that it delivers a highly simple breathing while in use underwater and also the dry breathing experience it provides is largely fancied by diver because it feels very natural.

Poseidon Cyklon 5000

Weight is a thing to consider keenly in a preferred scuba regulator, so divers have been known to use the weight of a dive regulator as key criteria. This Poseidon, although made with some metalwork, still register exceptionally light and stand to a very comfortable use; considering that it is designed with a large diaphragm housing.

Poseidon’s Cyklon set a new world standard for diving regulators. When it was introduced in 1958, the Cyklon was the first regulator in the world with a single hose and the demand valve situated at the mouth.

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.

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First Stage Balanced Diaphragm Design
LP Ports 4 Low Pressure 3/8 Inches Thread
HP Ports 2 High Pressure 7/16 Inches Thread
Second Stage Type Downstream Demand Valve
Material First Stage: Marine Grade Chrome Plated Brass. Second Stage: Housing Plastic, Internal Mechanism Brass, Stainless Steel And Rubber
Hose Thread 3/8 Inches
Hose Length 27.5 Inches (70 cm)
Total Weight 3lbs.

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  • 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
  • Reliable Downstream Demand Valve Design
  • Use Either-Way-Up
  • Materials: Durable Plastic Housing with Brass and Stainless Steel Mechanism and Rubber Parts
  • Automatic Venturi Assist and Inhalation Control
  • Approved to EN250 cold water standard
  • High performance, robust workhorse regulator
  • Approved to cold water standard

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Pros and Cons

  • DIN Type First Stage Design, For Air Use
  • Balanced Diaphragm First Stage
  • Second stage downstream demand valve
  • Venturi assist and inhalation control
  • Approved to EN250 cold water standard

  • Needs To Be Better Designed For Contemporary Fancy


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Editors’ Opinion

A very intricately designed vintage regulator, the Cyklon 5000 still one the most outstanding and ergonomic of the Poseidon regulators.

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