helium

  1. A

    LMNT King helium rising while continious blending

    Recently I have assembled a continious blending system. It runs on MCH6 Comtri 1 phase electrical compressor. I did some measuring and it does 90-100 l/min output. For blending I use LMNT King blender . Now I set both O2 and He limiters to run 2 bar. Adjust the needle valves on King to be output...
  2. A

    Gas Blending case

    Here is a gas blending system for those of you that don’t want to build a permanent station at home. This was my last winter project, when I made a movable continuous blending station for Trimix for my small Coltri compressor. I want to use a simple rotameter-based system for blending because...
  3. serpentara

    Sold! Hydraulics International Oxygen Booster Model 3G-SS-20-O For Sale

    Up for sale is a Hydraulics International Oxygen Booster model 3G-SS-20-O. This is a great little booster that is perfect for filling rebreather bottles or with enough time, 40 or 80 ft.³ bail out bottles. It can be driven with a home air compressor at 150 psi. 150 Psi drive gas will allow...
  4. Andre171

    He unavailable - DeepAir again?

    Hi, times have changed (esp. in Europe) and purchasing He is for some an issue. Hearing much rumor about it at the local dive sites. I'm curious if DeepAir may have a reconissance - if there is really a problem. Please feel free to post some regional informations. Thanks for voting, André
  5. giovyledzep

    PFO and Helium

    I remember hearing or reading somewhere that diving with Helium can be more dangerous to people with PFOs since it's a lighter and faster gas, so the bubbles can more easily pass to the left atrium. Has this been proven or is it just speculation? Any research about this? Thanks
  6. jagfish

    Nitrox and Scuba Gasses Video Lecture & Workshop- Full Version

    Nitrox and Scuba Gasses - Full Version I finally put this to video for posterity. A nitrox workshop plus alpha! Get a full overview of nitrox and all scuba gases and how they are used in scuba and how they relate to each other. An overview of how and why recreational divers vary gas mixes to...
  7. C

    Best place to learn Trimix

    Dear all, I am starting to think more and more about learning to dive with trimix. Within the following two years, I would like to dedicate a trip of a few weeks to explore the deeper depths. At the moment I'm technical (&) cave certified, and I'm wondering what would be the best place to do my...
  8. John Pham

    Sierra Precision Booster to boost Helium

    Hello guys, recently I picked up a used Sierra Precision Booster with about 200 hours on it and I like to use it to boost Helium, are there anything I must replace such as piston seals and gasket for Helium? Thanks
  9. dewdropsonrosa

    Adding helium: some numbers to think about narcosis.

    [Background] This is a very rudimentary look at a single aspect of gas planning: the narcotic potential of the breathing medium. Gas narcosis (whether N2, O2, or CO2) impairs divers' cognitive functions, which poses safety concerns. Understanding/mitigating the risks posed by narcosis is an...
  10. dave22387

    Hydro Atlantic without Helium?

    Hey guys, I want to dive the Hydro more since it is in my backyard. I have only dove it once and considering the cost of helium it really is cost prohibitive to go dive it just for giggles. How many of you guys and gals have done it on nitrox (22%-23%). I really haven't gone deeper than 150...
  11. J

    Closed Suunto D9tx Multigas/Trimix Diving Computer

    I received Shearwater Teric as a birthday gift last week so decided to sell my Suunto D9tx. It was purchased brand new in 2015 from local dealer in Atlanta, GA and has been serviced there as well. I have 200+ dives on it and it works flawlessly. It comes with transmitter, USB cable and...
  12. Z

    Hoses for Tec

    I'm wondering what hose types people are using for tec diving - helium, blends over 40% oxygen, etc. At the moment I'm using Miflex hoses for Air and Nitrox but it seems these are only rated for up to 40% oxygen. Not interested in length discussions, just materials and brands.
  13. Jax

    Deco For Divers, Ed 2, And Speed Of Helium Off-gas

    Mark Powell's Deco for Divers was so good, I bought the second edition. I've noticed quite a few updates, but one is not addressed. In the Trimix section, Helium is stilled called a "fast gas" and that it's smaller modules will go in and out of tissues faster. Recently, there was a report...
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