Description

Experience exceptional performance and build quality with the TUSA RS-681 / SS-81 Regulator Package. The compact and lightweight design of the RS-681 regulator, paired with the innovative S-81 second stage, pushes the boundaries of regulator engineering and performance.

The ultra-compact balanced diaphragm R-600 first stage weighs only 630g and features 2 HP and 4 LP ports for versatile hose placement. Additionally, optional accessories like the DIN conversion kit (DIN-R600) and environmental kit (EK-600) are available.

The newly designed S-81 second stage introduces innovative features:

Sequential Exhaust Assist (S.E.A.)
The S.E.A. system includes a dual exhaust design with an enlarged primary and auxiliary exhaust. This system significantly reduces exhalation resistance, enhancing the diver’s breathing experience.

The S-81 also features:

Venturi Adjustment
The venturi adjustment lever allows divers to control airflow underwater, utilizing the natural venturi effect to prevent free flow.

Moisture Exchange Plate
The moisture exchange plate captures condensation to increase air humidity, reducing the sensation of dryness in the mouth.

Breathing Resistance Adjustment Control
Easily adjust airflow with the breathing resistance control knob for a customized breathing experience.

Miflex® Hose
The Miflex hose offers exceptional flexibility, durability, and burst resistance, certified to EN250 standards.

TECHNOLOGY

Teflon Coated Plate test The Teflon Coated Plate prevents “dry mouth.” Condensation forms on the brass plate adding moisture to the dry air released from scuba cylinders.

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Click Spring Adjustment The Click Spring Adjustment feature is exclusive to TUSA. It is a five (5)-position adjustment knob designed to better control breathing resistance.

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Cold Water Ready The Cold Water Ready feature enables the diver to use the regulator in water temperatures below 50°F / 10°C.

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Environmentally Sealed 1st Stage The use of a secondary diaphragm and piston sealing the 1st stage preventing contamination or freezing when the regulator is submersed in contaminated or freezing water.

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Ortho-Conscious Mouth Piece The Ortho-Conscious Mouth Piece feature prevents jaw fatigue. The ridges and flexible material allow the diver to have more control of the mouth piece and reduces tension in the jaw.

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Sequence Exhaust Assist System The Sequence Exhaust Assist System gives the diver less resistance when exhaling due to its unique double exhaust design. The diver experiences smooth breathing cycles reducing air consumption and fatigue.

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Venturi Flow Adjustment The Venturi Flow Adjustment allows for ease of breathing by controlling the direction of air through the mouthpiece.