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Dive Perfect 2nd Stage Regulator / Octopus

DP-REG-2ND 120/60
Dive Perfect
$299.00 Sale:$275.08


The Dive Perfect Second Stage Regulator or Octopus is for the discerning diver who wants the benefits of a feature-rich regulator with a definitive blend of style, ruggedness and high performance, at a moderate price.

Every detail of this product has been carefully designed to deliver a regulator package of the highest quality with improved safety for divers. These regs meet the tough CE EN250 European standards and are cold water and Nitrox ready.

Dive Perfect 2nd Stage Features and Benefits

The Dive Perfect FR-02 Second Stage regulator is suitable for use as both your primary regulator or your octopus (backup) regulator.

The second stage regulators are compatible with EAN40 out of the box. They can be cleaned for use with 100% Oxygen.

Hose Length Choice: You can have a 60 cm or a 120 cm long, black, double braided flexible regulator hose. The 60 cm long hose is shorter and lighter than the 75 cm length rubber hoses typically found on most regulator sets. The shorter length gives you a more streamlined profile and significantly reduces drag. We typically use this length hose for our octopus on a single-cylinder regulator setup, together with a necklace to keep it around our neck. The longer 120 cm hose option enables you to route the regulator hose under your arm, and up into your mouth. We use this hose length for our primary 2nd stage on a single-cylinder regulator setup, together with an elbow adaptor. This gives you a longer than standard hose in an emergency. These double-braided hoses are lighter weight, more flexible and more durable than standard rubber hoses.

Dive Perfect FR-02 Second Stage

  • Pneumatically-balanced second stage results in smooth, easy breathing.
  • The FR-02 purge buttons are large and easy to operate. A 2-stage progressive purge is used - press the purge on the side for a lower flow rate, useful where more control is required such as filling lift bags etc, then press in the centre for the full effect of the purge, i.e. when cleaning the regulator etc.
  • The large venturi lever is easy to locate and use. The lever reduces the amount of grit ingress and therefore resists any possible friction giving a smooth operation.
  • Easy-to-grip opening effort control knob keeps the diver in control.
  • The comfortable mouthpiece virtually eliminates jaw fatigue.
  • A heat exchanger dissipates the cold caused by gas expansion while drawing in the warmth of the ambient water.

Dive Perfect Regulator Specifications

Dive Perfect FR-02 2nd Stage Regulator

Type of second stage Pneumatically balanced
Opening Effort Control Knob Yes
Integrated Venturi Lever Yes
Mouthpiece Comfortable mouthpiece
Heat Exchanger for freezing resistance Yes
Hose type Double braided flexible hose
Nitrox compatible Yes to 40% O2 when new, out of the box.
Can be cleaned for 100% Oxygen.

Dive Perfect Second Stage Technology

Pneumatically Balanced 2nd Stage

In most other regulator second stage designs, the inhalation effort of the diver opens a valve inside the regulator that is held closed by spring tension.

The Dive Perfect FR-02 2nd Stage Regulator features a pneumatically balanced valve system which means that the pressure on the second stage valve is "balanced" by allowing medium pressure air to pass through to the opposite side of the valve to help counteract the force of the spring. This reduces the inhalation effort required to open the second stage valve and substantially improves the overall ease of breathing in all diving conditions. This means that a dive on a Dive Perfect regulator is a far superior breathing experience to that of other competing regulators.

Reversible Venturi System (RVS)

The Dive Perfect Reversible Venturi System (RVS) allows the diver to control the venturi assist with greater precision due to the indexable Venturi Lever. Gas flow to the diver can be directed towards the mouthpiece by indexing the venturi lever towards the plus (+) position. This allows the diver an assisted breathe resulting in a more comfortable dive with less breathing effort.

A lot of regulators have a tendency to free flow in a strong current, during surf entry, or on the swim out on the surface. With the venturi lever in the minus (-) position, the air-flow in the second stage is directed onto the diaphragm, closing the valve and preventing free flow.

The Indexable Venturi Lever can therefore act as a pre-dive switch. When set in the minus (-) position the second stage will not free flow during the entry phase or if the regulator is dropped in the water. When the diver begins to use the regulator the venturi lever can be indexed toward the plus (+) position and the second stage will give the diver an assisted breathe resulting in a more comfortable dive with less breathing effort.

The Dive Perfect venturi switch is clearly marked and easy to use. Even a diver receiving it in an emergency can easily see how to switch it from minus to plus, regardless of what sort of hurry they might be in.

Inhalation Resistance Control Knob

The second stage regulators are equipped with an additional adjustment, which controls inhalation resistance. People who dive deep often like to be able to increase their breathing resistance.

This control knob, located beside the RVS switch, adjusts the amount of effort required to start the airflow at the beginning of the inhalation cycle. As it is turned "in" (clockwise), the opening effort will increase. This will make the second stage less sensitive to sudden changes in ambient pressure. Turning the knob "out" (anti-clockwise) will decrease the opening effort to make breathing easier.

This adjustment is particularly useful at deeper depths, or in variable conditions that affect the opening effort of the second stage, such as strong currents or while using a diver propulsion vehicle (DPV). You can use the inhalation control knob to tune your regulator to maintain its peak performance throughout the course of your dive, or you can leave it set in its mid-range position and dive with it as you would any non-adjustable second stage.

Exceeding CE EN250 Standard Performance

The Dive Perfect Edge Regulator Set meets the tough CE EN250 European standards. This means the regs have been tested on an ANSTI wet breathing simulator, which measures how much effort — "work of breathing" — it takes to move air through a regulator as it is subjected, underwater, to a precise series of depths and breathing rates.

Tests are performed at a high-pressure supply of 75 bar, at a rate of 25 breaths per minute and a tidal volume of 2.5 litres, to conform to European test standards. Per industry practice, the regs are tested in the face-forward position, and regs with breathing adjustments are set at the wide-open/no-free-flow point.

The simulator pressurises the test chamber to simulate depths of 50 metres (165 feet) of seawater. Each "breath" by the machine moves 2.5 litres of air through the regulator, and this is done at breathing rates of 15, 25 and 30 breaths a minute. These precisely measured volumes of air — 2.5 litres multiplied by the breathing rate — are called Respiratory Minute Volumes (rmv).

These regs have achieved better than 62.5 rmv @ 50 msw to meet the European conformance standard EN250. The fittest diver would be hard-pressed to keep up for more than a couple of minutes at this breathing rate and these regs will still perform well in even more extreme conditions.

Dive Perfect Regulator Sets

The regulator manufacturers do not endorse the installation or substitution of any non-factory part or component with their products because they do not have the ability to control or evaluate the quality and compatibility of such items. The installation of non-factory parts such as regulator hoses or other components may or may not have negative effects upon performance, function and safety. The regulator manufacturers disclaim liability for defect, damage or injury caused by the use of any non-factory parts or accessories.

Dive Perfect Service Kits and Parts

First and second stage Regulator Service Kits, plus other genuine factory-supplied parts, are available from The Scuba Doctor.

Service by other than an authorised dealer voids the warranty on all products we sell. Improper service of dive equipment can lead to serious injury or death.

Tech Tip: Backup/Octopus Second Stages

Traditionally, the backup or octopus second stage regulator has been a lower-performance, lower-cost, unbalanced design because it was thought to be less likely to free flow and less prone to problems. However, experience has demonstrated concerns with using a lower performance regulator under conditions that forced a switch to the backup, and most experienced divers are now choosing identical high-performance backup and primary regulators. The Dive Perfect high-performance balanced second stage regulators are very resistant to free flow when it has the venturi setting on pre-dive and the adjustment knob set low. Field experience has shown these regulators to be quite trouble-free as well.

Please download/read the Dive Perfect FR-02 Second Stage Regulator Diagram (PDF, 1 page, 4.5 Mb).

(04/22 AJG)

Customer Reviews 1

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Boon Wurrung Country
1/49 Peninsula Ave
Rye Victoria 3941, Australia
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