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A couple of weeks ago I tried the new Draeger NEMO regulator. Dive was performed with air by human (not breathing simulator) in open sea and at a depth of 30 m. The NEMO 2nd stage was part of a system called CHINOOK (by Draeger) and composed of one unballanced 1st stage, one CONSEIL octopus reg (basically a NEMO reg with 1 m hose), one pressure gauge and the NEMO. The 1st stage is a sturdy rated 300bar metal block wit a DIN connection, with two HP outlet and four LP outlet; the medium pressure could be adjusted from 8 to 12.5 bar. The real interesting thing is the NEMO 2nd stage: the principle of working is upstream balanced; there is an overpressure valve on one side of the reg. The shell is made of ABS and the diaphram, bubble deflector and mouthpiece are made of silicon rubber. The shape of the reg remember the ScubaPro Pilot design (with the Valve/diaphram on the bottom) and is very hydrodynamic and ergonomic (unfortunately I don't remember the weight !). Interesting is that the discharge air valve is built in the diaphram. The design is simple and reliable; the hart of the sistem is the needle valve (operated by the diaphram/lever assembly during the inhalation cicle) that seal the air flow with a sort of metallic mushroom head on top. Breathing in water was easy and smooth without any significant resistance and without the typical "inflating" sensation of the venturi effect of other regulators; no water ingress in any breathing position. I hope that my explanation is clear enough for everybody (my English is mediocre) and if someone need more details I'm at disposal. It will be interesting to analize some P-V loop diagrams at various depth or some bench test. Cheers, Roberto ======================================================================== MOLTENI ROBERTO SAIPEM S.p.a. roberto.molteni@sa*.in*.it* INTE (R&D dept.) TEL:+39.2.520.36655 Via Martiri di Cefalonia #67 FAX:+39.2.520.35475/32269 20097S.Donato Milanese, Milan, Italy ========================================================================
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