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Are AI transmitters as accurate as SPG's?

Discussion in 'New Divers and Those Considering Diving' started by purbeast, Aug 5, 2019.

  1. tbone1004

    tbone1004 Technical Instructor ScubaBoard Supporter

    # of Dives: I'm a Fish!
    Location: Greenville, South Carolina, United States
    @AfterDark I have a lot of HP hoses with stage and deco tanks and with the short ones being bent on a pretty frequent basis at tighter angles than normal, they break pretty often. Same with the spool o-rings and getting turned more than normal. The ones on my backmount rigs don't go very often, but the spool leaks and HP hose leaks are pretty well documented with cave divers. They're not catastrophic, but they're there
  2. AfterDark

    AfterDark Solo Diver

    # of Dives: 1,000 - 2,499
    Location: Rhode Island, USA
    Well that splains it, thanks. I only use BM and long HP hose in a console that precludes any possibility of bending or unintended bending at the spool. So no problems.
  3. kelemvor

    kelemvor Big Fleshy Monster ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Largo, FL USA
    I'm surprised suunto still has so many problems with their hoseless air integration. Is that normal for suunto or is the OP's computer/transmitter having a problem? I moved from scubapro with hoseless AI to ratio with hoseless AI and I haven't had a lot of problems with either.

    Do you have to redo the pairing on a suunto every time you boot the computer? With scubapro or ratio you just do it once. I never got a transmitter for the shearwater I had but I thought it would remember a pairing as well according to the manual.
  4. Zef

    Zef Divemaster

    With Suunto you only need to do it once as well and the code is locked unless it is manually reset. But, if the transmitter is activated and not paired within a certain window of time, such as assembling gear and opening the tank valve prior to getting dressed out and turning on the computer, after a minute or 2 without being paired the transmitter will transmit at a slower rate and with lower signal intensity. After 5 minutes of not being paired the transmitter will turn off all together and will need to be reactivated by closing the tank valve, purging the line, and reopening the tank valve...this wakes up the transmitter and allows the computer to pair up with it.

    I think Suunto gets a bad wrap on SB in general, and some of it is well deserved. There are questions about the algorithm they use, they had problems with bad depth sensors that the company ignored until they got slammed with a class action law suit, they had a major recall of transmitters where although they handled the recall exceptionally well they did not put out much information about what the problem was, etc.

    My family has 3 Suunto Vypers, 1 Vyper 2, and 1 Vyper Air. All have been working very well and none of us have any complaints. I am keeping my fingers crossed that our computers do not have depth sensors from the bad batch...but if one went belly up it would be a reason to upgrade to something newer.

  5. dmaziuk

    dmaziuk Regular of the Pub

    :boggle: what could possibly go wrong? Hopefully the other guys have Kept It Simple Stupid(tm) and have their transmitters just transmitting while the pressure is on.
    AfterDark likes this.
  6. DogDiver

    DogDiver Manta Ray

    # of Dives: 5,000 - ∞
    Location: Branford, Florida
    I’ll stick with tried and true “brass & Glass” SPGs. Cave diving with often 4 cylinders, I don’t want to have to second guess the PSI and mix I’m breathing.
    AfterDark likes this.
  7. purbeast

    purbeast Barracuda

    # of Dives: 0 - 24
    Location: Rockville, MD
    I didn't get a chance to try clearing out my code or hooking it up again the past few nights and today I took my tank to get hydros/VIP. I'm going to be testing out all my gear at a pool Sunday so hopefully it works for me there.
  8. Neilwood

    Neilwood Loggerhead Turtle

    # of Dives: 50 - 99
    Location: Scotland
    Personally I would prefer AI over SPG for accuracy.

    When it comes down to longevity, I think they are now so close to equal as to make it a non issue for most divers (assuming proper maintenance and use we are probably talking failure rates in the thousandths per dive now for both).

    I have dived with both until recently however I have now taken the SPG off and it resides in my dive bag as a spare (and can be fitted in 2-3 minutes if pushed). Only had one issue to date with the AI and it was entirely a user generated problem. No disconnects to date.

    Should either fail during a dive though my action would be the exact same - end the dive with a safe ascent to the surface.
    Lostdiver71 and Satrekker like this.
  9. AfterDark

    AfterDark Solo Diver

    # of Dives: 1,000 - 2,499
    Location: Rhode Island, USA
    Personally, I don't care if my gauge reads 500 psi and the real pressure is 300 psi I'm on the surface.
    kelemvor likes this.
  10. AfterDark

    AfterDark Solo Diver

    # of Dives: 1,000 - 2,499
    Location: Rhode Island, USA
    Andrei Astra likes this.

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