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- Nickel and chrome plated brass case
- Equipped with VAD system
- Ideal octopus choice for demanding cold water dives
Here's a great light and compact all metal+ Octopus from Mares, the Proton Metal. It is packed with Mares features:
• Nickel and chrome plated brass case.
• Equipped with VAD* system.
• Compact size.
• Ideal octopus choice for demanding cold water dives.
• Mesh grid design: The grill design optimizes the flow of water around the second stage diaphragm, minimizing the likelihood of free-flow. The calibrated holes allow a large amount of water to flow through, while at the same time reducing undesirable dynamic effects, even when swimming against a strong current.
+All metal: Mares is the only manufacturer in the world to offer a complete range of regulators with the second stage cases produced entirely in metal; anti-corrosion nickel and chrome-plated brass. In cold water, metal second stages have superior performance and are safer than second stages manufactured in plastic materials, thanks to the high thermal conductivity that limits the freezing effect.
When inhaling, compressed air from the first stage expands inside the second stage and creates an abrupt drop in the temperature of the air, which in cold water can drop to a few degrees above freezing. This situation, along with the natural humidity inside the second stage, can cause ice crystals to form, and when on the demand lever, can result in small air leaks and then trigger free-flow.
Metal is a good conductor of heat, and makes the water surrounding the second stage act as a heating element for the air inside and prevents this opportunity for free-flow.
Strange as it may seem, even at temperatures very close to the freezing point, the water is still warmer than the air expanding inside the second stage.
Additional benefits of "All Metal" Mares second stages are:
- Improved resistance to harsh conditions, rough treatment, and abrasion
- Longer working life of the product
- Less dry mouth, because the humidity of exhalations condenses on the inner walls of the metal second stage and moisturizes every breath
*VAD: All Mares second stages offer the unique, patented, VAD system (Vortex Assisted Design).
This unrivaled system eases breathing at all depths. The working principal is very simple.
As air comes from the hose, it passes into the second stage and is conveyed directly to the mouthpiece through the by-pass tube. A "vortex" is created in the airflow as it enters the mouthpiece. In the center of this swirling air is an area of a low-pressure.
This low pressure helps keep the second stage diaphragm down during inhalation, thus increasing the regulator's sensitivity and minimizing respiratory effort. Regulators with the VAD system, offer improved performance and allow for very natural and comfortable breathing. One of the main causes of ice forming in regulators is the expansion of air inside the second stage case, which causes an abrupt drop in temperature. With the VAD system, air expands inside the by-pass tube and mouthpiece, reducing the likelihood of icing.
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