Did a dive on Hollis Explorer today

Discussion in 'Rebreather Diving' started by Jill Heinerth, May 23, 2012.

  1. Jill Heinerth

    Jill Heinerth RebreatherPro ScubaBoard Supporter

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    Location: High Springs, Florida
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    This is the game changer in sport rebreathers!

    Kev Gurr called me last night after doing his first dives on the new Hollis Explorer rebreather. It totally exceeded his expectations. It is the product of years of his design and engineering efforts and he was still blown away by actually diving his own rig. I had the honor of being the first person to dive it after Kev. Needless to say, when he made the offer, I drove to Blue Grotto as fast as I could.

    The Explorer is an SCR but if you ever owned a Drager, this is a completely different ballgame. To begin with, it only needed a couple of pounds of trim weight in a wetsuit (I think I used about 25 pounds on the old Drager). It intelligently adds gas as needed, carefully monitoring the O2 with three sensors. It barely burps (unlike the old Drager). All checks are automated with the onscreen checklist. It won't breathe at all unless the sorb canister is properly inserted in the unit. It has a gaseous CO2 monitor, integrated BOV, HUD and wrist computer. It is put together in minutes without tools and has an integrated black box for download (will offer blue tooth download). It recharges through a simple port and that part of the rebreather can be taken in your hotel room at night for recharging rather than the entire unit.

    The diving experience was incredible. It trimmed perfectly and swam like a dream. The projected price will be far below anything else and will bring rebreathers to a whole new subset of diving. I know recreational divers will love it, but you will be seeing me at Ginnie with a pair of sidemount bailouts using this in the future! The pic shows Kev in the standard BC but it will also ship with a ted harness for those that prefer.

    All good!

    Explorer5496.jpg
     
  2. 57Writer

    57Writer Photographer

    # of Dives: I just don't log dives
    Location: Florida
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    Jill Heinerth came home all smiles today! This is as excited as I've ever seen her about diving gear. Some girls like Tiffany, some Victoria's Secret - Jill likes Tech! She's not like other girls!
     
  3. reddiver970

    reddiver970 PADI Pro

    # of Dives: I'm a Fish!
    Location: Fort Collins, Colorado, United States
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    When will it be available to the public?
     
  4. formula1mb@aol.com

    formula1mb@aol.com Barracuda

    # of Dives: 50 - 99
    Location: Southern California
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    What's the selling price going to be? What exactly does far below anything else mean?

    Below 5k? 3k? You can already get the KISS GEM for little over 3k so hopefully it will be in the same ball park.
     
  5. rongoodman

    rongoodman ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Albany, NY
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    Sounds like Katie Brown going shopping for nylons, shoes, and a new belt in that Citibank ad--maybe Jill can do a cave diving version.
     
  6. jepuskar

    jepuskar Scuba Instructor

    # of Dives: 500 - 999
    Location: Chicago, IL
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    This will be something to keep an eye on. Thanks for the post.
     
  7. SnorkelLA

    SnorkelLA Surface Interval Member

    # of Dives: 200 - 499
    Location: The Water
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    Probably would go something like, "my husband and I were going on vacation, so I decided to pick up a few things with my Citi Thank You card, a new rebreather... aaaaaaaaand damn my card maxed out."

    :)
     
  8. Chett L

    Chett L Rebreather Pilot

    # of Dives: 500 - 999
    Location: Los Angeles, California
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    Hi Jill,

    Thanks for the report, look foward to trying this unit.

    Best regards,
    Chett
     
  9. muzikbiz22

    muzikbiz22 Manta Ray

    # of Dives: I just don't log dives
    Location: Southern California
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    Any updated info on this unit ?
     
  10. AdvenJack

    AdvenJack Garibaldi

    # of Dives: 0 - 24
    Location: North of Tampa, South of Homosassa, United States
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  11. jlovold

    jlovold Barangay Pasaway

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    Location: Sandnes Norway
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    How would it react if you added offboard O2 via a needle-valve?

    I guess it would stop injecting as long as the PO2 was high enough. And if you close the needle-valve, it would resume injecting as the PO2 comes down again.

    That would make it a mCCR/eSCR-clone, that I think would give you the best of both worlds, and very few of the cons.
     
  12. darushin

    darushin Barracuda

    # of Dives: 200 - 499
    Location: Tampa FL, USA
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    The unit is very "sensitive" about alarms. My guess, it would alarm if there was no PO2 change after a minute.

    Daru
     
  13. demed

    demed IDC Staff Instructor

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    Location: Kirkland, Washington, United States
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    Apparently, setting the DCP on manual and adding a manual valve to inject O2, some folks are diving it as a e/mCCR.... i'm still trying to find out more about it...
     
  14. EZ Scuba

    EZ Scuba Scuba Instructor

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    The net result of adding offboard gas, be it O2 or Nitrox, is to fool the unit into thinking you have not created as much CO2. The unit assumes that the O2 in the onboard tank is what you have available for metabolism. As you metabolize that O2 you create measurable amount of CO2 and therefore you have a calculable duration for your scrubber. If you bypass the onboard cylinder you are bypassing the pressure monitoring that informs the computer as to the amount of O2 that is used in the calculation. These are the volume calculations that yield the CO2 for fixation. There are other factors in the scrubber duration calculations and eventually they will determine the "filter" time that remains and is displayed on the status screen. The fact that you are deceiving the computer with this method forces the computer to yield somewhat inaccurate information regarding the usage parameters set by the manufacturer. That is your choice, but you damn well better know what the hell you are doing if you want to avoid injury. At this level of off-standard usage, the optional CO2 sensor is an ABSOLUTE necessity. If you are going to push the absorbent farther than you were instructed, you must have the CO2 sensor installed. Doing any of this is at YOUR OWN RISK.
    As far as the actual content of the loop, the O2 sensors do track PO2 and therefore provide data regarding decompression/NDL limits accurately as long as the only two gases are O2 and N2.
    There are a few of us that have pushed the limits of the Explorer, but we understand that what we are doing is for our knowledge and understanding. If you wanted a full trimix/100m eCCR and bought an Explorer, you made a mistake. That being said, I have both, I instruct for both and love to tinker. The Explorer is a fantastic unit when used within the manufactures specifications
     
    muzikbiz22 and demed like this.
  15. muzikbiz22

    muzikbiz22 Manta Ray

    # of Dives: I just don't log dives
    Location: Southern California
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    Can you elaborate ?? Have you gone past the limits or "discovered a unique application" or ? Not looking for a hack or a shortcut or a workaround. Just curious :)
     
  16. eelnoraa

    eelnoraa DIR Practitioner

    # of Dives: 100 - 199
    Location: San Francisco Bay Area
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  17. Dr. Lecter

    Dr. Lecter Great White

    # of Dives: 500 - 999
    Location: NYC/Honolulu
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    SCR has a largish tank of gas that's theoretically breathable at any point in the dive rather than separate bottles of dil and 100% O2...coupled with the Explorer's standard BOV, one can theoretically dispense with separate BO bottle. Though if you somehow managed to get a caustic cocktail out of an extendair cartridge, I imagine you'd like to rinse thoroughly after hitting the BOV lever.
     
  18. muzikbiz22

    muzikbiz22 Manta Ray

    # of Dives: I just don't log dives
    Location: Southern California
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    Extendair cartridge in an Explorer ?? I'm intrigued :)
     
    tphelps likes this.
  19. Dr. Lecter

    Dr. Lecter Great White

    # of Dives: 500 - 999
    Location: NYC/Honolulu
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    Oh Gods...I just assumed anything that Fisher Price-y had to avoid making scrubber packing the diver's responsibility. That's...just fantastic.
     
  20. eelnoraa

    eelnoraa DIR Practitioner

    # of Dives: 100 - 199
    Location: San Francisco Bay Area
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    I am sorry, since I am not a rebreather dive, I want to understand this a little more.

    If the gas in this rebreather can be breathed at any depth of the dive, how can the rebreather maintain a constant PPO2? Say you plan to dive to 100ft, you carry 32% (assume 1.3). At 100ft, it is 1.3, but at say 50ft, how can you get 1.3 out of 32%?
     

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