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  1. #41
    Established TDF Member witchieblackcat's Avatar
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    Quote Originally Posted by BTS View Post
    Dunno, why do I use a GG BOV instead of the AP one, why have I ditched the yellow box for a steel frame, the tekwing for a frog.. Sometimes there are better alteratives, sometimes companies test with one thing but dont test with another, saying it isn't approved doesn't mean it wouldn't work as well if not better.

    It is good to question and look at alternatives, non of us got into diving because we follow the crowd, we got there following our own path.
    You might have a better unit now. Or you might have the equivalent of a 19 year olds souped up Ford Escort with a baked bean can on the exhaust and a ridiculous wing which makes loads of noise on the bypass but is outperformed by a modern 1.0 Corsa.

    As long as you're happy though

  2. #42
    Established TDF Member Steve C's Avatar
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    Hope it is ok to resurrect this thread ... any more thoughts / experience in using Intersorb 812 .. particularly in an Inspiration.

    I would use Sofnalime if it was not a pain to get hold of in Spain (no local dealer /importer that I can find) and there is a local supplier of the Intersorb.

    Cheers

  3. #43
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    Quote Originally Posted by Steve C View Post
    Hope it is ok to resurrect this thread ... any more thoughts / experience in using Intersorb 812 .. particularly in an Inspiration.

    I would use Sofnalime if it was not a pain to get hold of in Spain (no local dealer /importer that I can find) and there is a local supplier of the Intersorb.

    Cheers
    I use 812 almost exclusively in the UK and used 797 outside of the UK.

    I don't think that the dust issue is a problem for me and I didn't really see a difference in WOB between the two.

    I am aware that there is potentially a difference in the amount of CO2 that 812 can absorb being lower than 797, but I never push my scrubber.

    I read a comment on another forum that said he believed the difference in time available on 797 made up for the difference in price, but you would then need to run a CO2 monitor and push things - something I'm not prepared to do.

  4. #44
    Gone diving back later Vanny's Avatar
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    http://www.xray-mag.com/content/rebr...earch-unveiled

    Not sure if that's any help but interesting

  5. #45
    Established TDF Member matt's Avatar
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    Quote Originally Posted by Steve C View Post
    Hope it is ok to resurrect this thread ... any more thoughts / experience in using Intersorb 812 .. particularly in an Inspiration.

    I would use Sofnalime if it was not a pain to get hold of in Spain (no local dealer /importer that I can find) and there is a local supplier of the Intersorb.

    Cheers
    APD say it is not adequately tested in their units, note it doesn't say it's no good.

    The problem is no one is dipping their hand in their pocket to pay for all the testing required on the different materials. The tests are time consuming and costly and above all, it has to make business sense… and from our past experience with Sodalime 812 – we didn’t know the limitations of the material until we had a large batch in.[/FONT]

    The Intersorb 812 wasn’t the same as 797 as claimed by an Intersorb representative. We learned within 4 test dives, 2 days of testing, that the Tempstik needs adjusting for that material as the warnings are inappropriate and the Intersorb 812s performance wasn’t as good at depth. To properly verify the material in each rebreather will be too costly.
    I believe subsequent posts focused on consistency of the product. From my experience warm water negates most evils with absorbent.

    Intersurgical say their absorbent is better: http://www.divelong.com/files/test-data1.pdf

    Molecular say their absorbent is better: https://jmldiving.com/data/include/c...ctober2012.pdf

    Look at the test characteristics of each and make your own decision, the test environment is not the same for each.

    Cheers
    Matt.

  6. #46
    Old but keen Mark Chase's Avatar
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    I have used 812 for up to five hours total in a JJ CCR and down to 96m. I have regularly dived it for 3-4 hours single dive depths 60-80m

    If I were pushing the max duration (which for me would be over 6 hours on one dive or multiple dives, or over 100m depth) I'd want the 797

    For anything else 812 has been fine

    I did dive 812 in an Inspo classic but only one tub, so not a great deal of data, but several dives in the 70m zone for over 3 hours

    Personaly I think its more dusty but not by enough to make me not use it.

  7. #47
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    Hello,

    In the course of the spherasorb vs sofnolime study.....

    http://bit.do/sorb

    .... we ran a couple of 812 canisters. We may finish enough runs to publish a proper comparison, but (based on limited date) there was effectively little difference in duration to significant CO2 break through on our 6 MET protocol between 812 and 797.

    The significant difference between spherasorb and 797 has been discussed previously and is documented in the paper which can be accessed at the above link.

    Simon M

  8. #48
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    Quote Originally Posted by simon mitchell View Post
    Hello,

    In the course of the spherasorb vs sofnolime study.....

    http://bit.do/sorb

    .... we ran a couple of 812 canisters. We may finish enough runs to publish a proper comparison, but (based on limited date) there was effectively little difference in duration to significant CO2 break through on our 6 MET protocol between 812 and 797.

    The significant difference between spherasorb and 797 has been discussed previously and is documented in the paper which can be accessed at the above link.

    Simon M
    Hi Simon,

    I think it is appropriate to re-mention that your testing was only done at the surface.

    The tests commissioned by Molecular Products compared performance at 40m and in 4C ( CE test rate of 40 RMV and 1.6 lpm CO2) - and it showed the performance of the Intersorb product was down on the Sofnolime 797. From memory it was about 20% down.

    Most importantly though, the temp-stik warnings didn't work properly with the Intersorb, and it is the use of the Tempstik that allows worry free, multi-dive, extended use, basically taking the guess work out, giving you lots of extra duration in most diving scenarios.

    Martin

  9. #49
    rEvolutionary Diving Simon TW's Avatar
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    Bit old this thread but hey I've been busy.

    We took Insersurgical Dive Lime to Sudan for an Expedition. That means that we shipped it in September to Italy and it was then stuffed (yep that's the word that they use and charge you for) into a container for Sudan for use the following April/May it was used on 26 sub 100 metre dives down to a maximum of 213 meters and after a 7 hour run time there was still an hour remaining on the rEvo top scrubber.


    Should add that me had no issues.

  10. #50
    Established TDF Member
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    Quote Originally Posted by Simon TW View Post
    Bit old this thread but hey I've been busy.

    We took Insersurgical Dive Lime to Sudan for an Expedition. That means that we shipped it in September to Italy and it was then stuffed (yep that's the word that they use and charge you for) into a container for Sudan for use the following April/May it was used on 26 sub 100 metre dives down to a maximum of 213 meters and after a 7 hour run time there was still an hour remaining on the rEvo top scrubber.


    Should add that me had no issues.
    Pardon??

    Any links to information on the expedition, or is that to follow??

    ta.


 
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