Mares Instinct 12S Regulator 416164INT 033537

Mfg Part #: 416164INT
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Customer Reviews for Mares Instinct 12S Regulator:

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Average Customer Review: based on 1 reviews.

Rating: Mares Instinct 12S Regulator Review - Scuba Gear Customer Reviews
Reviewer: Poomjai N.  -  View all my reviews
Would have been happier if it came w/ a longer hose. In any event, because Ive now gone sidemount, I bought myself a longer MIFLEX hose for the job.

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Questions and Answers for Mares Instinct 12S Regulator:

  • MG:

    Id like to buy mares instinct(white) with 52 model. I think your picture is 52. But your title is 12 model. Please clarify 1st stage and 2nd stage.

    Darrick  (Certified Scuba Instructor at

    Hello MG, the white version of the 52 is a discontinued model no longer made by the manufacture.

  • Jared:

    Hi, dose the mares instinct 12s regular have an environmental seal, And also how many high pressure ports dose it have?

    Darrick  (Certified Scuba Instructor at

    Hello Jared, no the 1st stage is not environmental seal. It also has 2 HP and 4 LP ports.

  • Jason:

    Is the supplied hose braided?

    Bob  (Certified Scuba Instructor at


  • Mike:

    Is the first stage DIN or york screw type?

    Arthur  (Certified Scuba Instructor at

    Hello, this is a yoke.

416164INT - Instinct 12S

One of a kind

• Hydrodynamic second stage shape
• Lateral exhaust tee
• Lightweight

The revolutionary design of this second stage introduces a multiplicity of benefits.
The side exhaust deflects the exhaled breath, so that hardly any bubbles will ever crowd your view. The angled diaphragm combined
with the VAD system ensures high performance in any orientation.
Compensating openings in the back minimize the likelihood of freeflows in strong current. The 12S first stage features DFC system for
consistent flow, Tri-material poppet to guarantee high reliability and four pre-oriented LP ports.

Product Details

Code: 416164
Material: Technopolymer
First stage: Balanced diaphragm design
First stage weight (g) INT: 674
First stage weight (g) DIN300: 574
Second stage weight (g): 150
Total weight (g) INT: 962
Total weight (g) DIN300: 859
Second stage dimension: Compact
Oil/Dry cold water kit: Dry
Nitrox: -
HP Ports: 2 HP 7/16' UNF ports
LP Ports: 4 LP 3/8' UNF ports
Inhale pressure: 10.70 mbar
Inhale pos pressure: 2.44 mbar
Exhale pressure: 10.83 mbar
Ext work breathing: 1.02 J/l
Inhale work: 0.33 J/l
Pos inhale work: 0.04 J/l
Exhale work: 0.69 J/l
Pressure depth: 50m (165ft)

Product Features

Dynamic Flow Control: Minimizes intermediate pressure drop during inhalation thus maximizing gas delivery, especially under extreme conditions. The DFC system (Mares patented) minimizes the pressure drop that occurs in all regulator first stages when the diver inhales. This phenomenon is even more pronounced as depth increases and when airflow demand from the regulator rises.

The DFC system is an exclusive system, unique on the market, that operates in relation to the diver's actual air demand, independent of depth and tank pressure.

The DFC system uses the Venturi Effect, optimizing the regulator's sensitivity and minimizing inhalation resistance, especially during dives in extreme conditions.

Small Size: Innovative Diaphragm design and component layout result in tangible reduction of dimensions. Enjoy unique wearing comfort and easiest handling and storage.

Superflex Hose: Extreme light weight and exceptional softness guarantee the maximum freedom of movement.

Tri-Material Valve: Patented technology combines two grades of polyurethane on a brass core. Maximizes performance, safety and reliability.

It is composed of: a central valve body manufactured in nickel-plated brass; a highly-resistant polyurethane coating covering nearly the entire valve body that can ensure elevated resistance to wear and mechanical stresses; finally, an additional covering is applied to the surface ('head') of the valve; this covering is also polyurethane but has a softer 'modulus'(hardness) to provide a perfect seal, even under extreme conditions.

Thanks to the use of a special technology ('adhesion at the molecular level') and the characteristics of the materials used, a high level of safety (uncontrollable free flow never occurs) and reliability is guaranteed under any conditions.

Ultralight Techno Polymer: Abrasion resistant and affordable, ideal for diving in warm and moderate water temperatures.

Vortex Assisted Design: The air bypass tube conveys air to the mouthpiece creating a swirling vortex with a low pressure area in the center that keeps the diaphragm down during inhalation, for very sensitive and easy breathing at all depths.

The air coming from the LP-hose passes through the second stage control valve and is conveyed directly to the mouthpiece through the by-pass tube (Mares patented). In the mouthpiece connector, the airflow creates a swirling action, or “vortex”. The core of the vortex is a low-pressure area, which, during inhalation, helps to hold down the second stage diaphragm, thus markedly increasing regulator sensitivity. The decisive advantage of the VAD System lies in the precision of its control. The VAD supplies the inhalation effort with just the intensity required.

Another advantage of the VAD system is related to the bypass tube, through which most of the air is delivered. In cold water diving, this system prevents ice crystals (which can be generated by the expansion of humid air in cold temperatures) from interfering with the proper operation of second stage components.

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