Typical for Spherasorb behavior?

4ster

I did my first dive using Spherasorb last Saturday, up to now my exclusive exprience has been using Drager Divesorb.

Work of breathing *may* have been slightly better. It is a little less dusty. I was impressed by the uniformity of the grain shape and size. My local shop sells Divesorb in the large keg for $125, I got the Spherasorb through a medical supply company for about 20% less per kilogram. I found the local supplier by emailing Intersurgical from the contact link on their web site.

Tami J LaMere, Customer Service
Intersurgical, Inc.
417 Electronics Pkwy.
Liverpool, NY 13088
315-451-2900 ext. 207
tlamere@intersurgicalinc.com

I am diving a Dolphin, my buddy was diving OC so I had a 1/2 fill in the canister on a shallow, low exertion, 51 minute dive.

Immediately after the dive I emptied the canister to examine the Spherasorb for the purple color change. I was surprised that I didn't see any change. (Well, maybe a couple of grains were slightly purple.)

I would be interested in other divers experience using Spherasorb, especially regarding the reliabily of the color change on a dive. I am trying to decide if what I saw was a true indication of how little of the sorb was completely spent.

Steve

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Steve
"My problem is that I have trouble reconciling my gross habits with my net income." Errol Flynn

tamorgen

I'd be very interested in the results. Less dust, less cost, longer lasting... sounds like a good cmbination. What is the grain size?

Padipro

I would be very interested in hearing what the experts have to say about this. Being that it's sold in 11 pound cans it would be perfect for two fills in my 5.5 pound Meg scrubber.

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Scott



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Gilles

I've been using sherasorb now for about 80hrs or so. Using the pink to white version. Also significantly cheaper than the available Divesorb.

No issues whatsoever except I don't like removing my pink scrubber in front of all the macho divers.

It does turn white with use.

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Gilles
http://www.dirrebreather.com

4ster

From a product sales sheet: "Spherasorb is made of 3-4mm
spheres"

__________________
Steve
"My problem is that I have trouble reconciling my gross habits with my net income." Errol Flynn

Stephane

Hello Steve,

I use Spherasorb in my rEvo. As this is my first rebreather, I can't tell if Spherasorb produces more or less dust than other brands.
It does produce a small amount of dust and putting an APD filter in the scrubber is a plus.
The granular size is 3,5mm as said in the data-sheet.

For the color changing, I can say that it is just an indication. As my scrubbers are not transparents, I can't tell if it is violet all the time but I have already seen it changing from white to violet (dumped the sorb right after the dive). What I saw is that the violet color is not permanent: when the sorb is cooled down, it goes back to white (violet right after the dive, white when I was back at home few hours later).
Don't rely on this to change your sorb. Use instead your timer: 1kg of Spherasorb will last 2 hours. My half-scrubber contains 1,5kg of sorb so when I have dived 3 hours, I change.

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Stéphane

caveseeker7

The usual "mesh" sizes used for CO2 absorbant are Tyler screen size.
The mesh numbers denote the number of openings in the screen per linear inch

Dräger Dive Sorb is 5-9 mesh (between 2 mm and 4 mm)

Grace Sodasorb and Molecular Sofnolime come in 4-8 mesh (2,38 and 4,76 mm)
as well as Sodasorb in 6-12 mesh (1,41 mm and 3,36 mm)
and Sofnolime in 8-12 mesh (1,41 mm and 2,38 mm)

Sperasorb would be somewhere between 5-7 or 5-8 mesh.

More info on particle size.

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Cheers
Stefan



"Political Correctness is a doctrine, fostered by a delusional, illogical minority,
and rabidly promoted by an unscrupulous mainstream media,
which holds forth the proposition that it is entirely possible to pick up a turd by the clean end.!"

Molecular Products Ltd

Spherasorb has not been passed for use in diving. This means that at no time has it passed the appropriatte and stringent testing that a diving grade requires. This means as the conditions get more rigirous it could fail at anytime. It may not but you decide.

On a technical point

About the spherical particles,
Spherical particles tend to be all of a very similar size and therefore pack very evenly - sounds like a good thing, but in fact leads to more voids between particles as there are no smaller particles to fill the voids. This leads to increased risk of channeling and a lower packing density and therefore less active material per unit volume in the absorber. Also, spheres have a greater distance to the centre of the particle than our 'D' shaped particles, leading to a higher amount of unused/unusable material at the centre. Both of these effects lead to less capacity per unit volume AND per unit weight.

Regards

fredrik

Where did you find this information? Maby some other producer?

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Fredrik
Rekodeko, Sweden
http://www.rekodeko.se

schford

Would have thought their fairly extensive testing

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