TUSA RS-681 Regulator
TUSA RS-681 Regulator
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The RS-681 is TUSA's latest regulator that delivers
superior performance and build quality in a compact
lightweight design. The R-600 paired with the newly
developed S-81 second stage further pushes the regulator
engineering and performance envelope.
The ultra-compact balanced diaphragm R-600 first stage is
incredibly small and weighs only 630g. The R-600 is configured with
2 HP and 4 LP ports allowing for versatile hose placement. A DIN
conversion kit (DIN-R600) and an environmental kit (EK-600) is
also available.
The newly designed S-81 second stage offers the following
features:
S.E.A. - Sequential Exhaust Assist
The Sequential Exhaust Assist (S.E.A.) is a revolutionary new
second stage design featuring a dual exhaust system. The S.E.A.
system consists of an enlarged primary and an auxiliary exhaust.
The auxiliary exhaust, located on top of the S-81 elliptical case,
works in conjunction with the primary to significantly decrease
exhalation resistance.
Exhalation resistance directly affects the diver's natural
breathing cycle. By reducing this resistance or increasing
exhalation performance, the diver breathes more naturally and
comfortably reducing respiration rate and air consumption. Paired
with the R-600 first stage, the S-80 offers a seemingly effortless
underwater experience regardless of the workload.
Venturi Adjustment
The addition of a venturi adjustment lever on the S-80 allows the
regulator to power assist the diver when underwater utilizing the
natural venturi effect. The diver can also adjust the lever to
prevent free flow such as on a surface swim.
Moisture Exchange Plate
The S-81 second stage incorporates a moisture exchange plate that
captures condensation produced by inhalation and exhalation
efforts. This condensation increases the humidity of the air
breathed and helps to reduce that dry mouth sensation often
experienced while diving.
Breathing Resistance Adjustment Control
The Breathing Resistance Adjustment Control on the S-80 allows the
diver to simply adjust the flow of air according to their needs.
The easy-adjust multiple click knob allows you to quickly and
finely tune resistance.
Miflex Hose
The Miflex hose is light weight and extremely flexible. The
multi-layer construction shows excellent abrasion resistance and
allows for a longer lifespan found in traditional hoses. This kink
resistant hose offers a burst resistance twice that of traditional
hoses. The Miflex hose is certified to EN250 standards.
TECHNOLOGY
Teflon Coated Plate testThe Teflon Coated Plate prevents dry mouth. Condensation forms on the brass plate adding moisture to the dry air released from scuba cylinders. |
Click Spring AdjustmentThe Click Spring Adjustment feature is exclusive to TUSA. It is a five (5)-position adjustment knob designed to better control breathing resistance. |
Cold Water ReadyThe Cold Water Ready feature enables the diver to use the regulator in water temperatures below 50 degrees F / 10 degrees C. |
Environmentally Sealed 1st StageThe 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. |
Ortho-Conscious Mouth PieceThe 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. |
Sequence Exhaust Assist SystemThe 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. |
Venturi Flow AdjustmentThe Venturi Flow Adjustment allows for ease of breathing by controlling the direction of air through the mouthpiece. |
Features:First stage (R-600)
| > | Ultra-compact balanced diaphragm
first stage |
| > | EK-600 cold water kit available for
temperatures below 50 degreesF/10 degreesC |
| > | DIN-R600 conversion kit available
(300bar/4350psi) |
| > | 2 HP and 4 LP ports |
Second stage (S-81)
| > | Elliptical low-profile case
design |
| > | S.E.A. - Sequential Exhaust Assist
technology (Pat P.) |
| > | Venturi adjustment lever |
| > | Built-in moisture exchange plate |
| > | Attached to MIFLEX hose for
exceptional flexibility |
| > | Breathing Resistance Adjustment
Control |
| > | Ortho-consciously designed
mouthpiece |
| > | Eligible for TUSA CARE Free Parts for
Life Program - USA Only |
Product Data Sheet