Dive Talk Go Rebreather

[lostsheep]

For those longer dives there’s a lot of choices available… or the ChOptima if dived with the proprietary scrubber.

What proprietary scrubber do you speak of? I’m calling BS

 

[EE-JIT]

Many thanks for those responses very helpful.

Im learning this is like buying a car…..
I have been asking around reading manuals and generally trying to build a base of knowledge. So your responses are very helpful.

Is the primary reason the go is unsuitable for trimix the scrubber duration? Or are there structural issues solenoid size or type, or the shape of the canister that means it will not work well with tri mix?

As I am looking to unlock the 60-80m range it seems that a choptima or triton FX are eager options that will travel and accommodate trimix. (Ignoring the EvsM considerations).

Is ths a fair statement?

Cheers

Eejit

 

[JMBL]

Triton will take you to hypoxic trimix with the proper training, but like with any other rig, it'll take time.

 

[Wibble]

What proprietary scrubber do you speak of? I’m calling BS

That difficult to obtain and expensive disposable scrubber cartridge - ExpendAir? Imagine flying somewhere for long dives and having to bring those cartridges with you; adds to the travel weight.

The ExtendAir cartridges are 3x the price of Sofnolime (£300 for 8 plus tax, import duties, delivery compared with £100 for one 20kg/44lb tub of Sofnolime)

Or fill it with sorb but have an undefined but far shorter scrubber duration, 2h30?

Will it ever be CE approved? If it were, we'd know the scrubber duration like the FX-CCR and Triton.

---

@EE-JIT -- are you specifically interested in a chestmount rebreather?

 

[makar0n]

Or fill it with sorb but have an undefined but far shorter scrubber duration, 2h30?

Choptima has a a scrubber rated at 4h using 812 sorb. I so far found it very conservative, at least in warm water
What you are talking about are EAC (Extend Air Cartridges) - these are rated slightly longer, indeed, but its just another option - Choptima scrubber was designed in a way so it can take both.

 

[Wibble]

Choptima has a a scrubber rated at 4h using 812 sorb. I so far found it very conservative, at least in warm water
What you are talking about are EAC (Extend Air Cartridges) - these are rated slightly longer, indeed, but its just another option - Choptima scrubber was designed in a way so it can take both.

I really tried to find a specification for loose 'sorb with ChOptima. Their manual only mentions 4h for the ExtendAir cartridges but does not mention loose sorb. I would really like to see the spec for that, especially using "standard" Sofnolime.

[I'm very interested in chestmount for travelling (lightweight) and cave diving (pushing it ahead in restrictions). The ChOptima is great in a lot of ways, but isn't CE approved and as such isn't officially supported in Europe. I know you have one so it would be interesting to hear your experiences especially in Europe]

 

[makar0n]

I really tried to find a specification for loose 'sorb with ChOptima. Their manual only mentions 4h for the ExtendAir cartridges but does not mention loose sorb. I would really like to see the spec for that, especially using "standard" Sofnolime.

[I'm very interested in chestmount for travelling (lightweight) and cave diving (pushing it ahead in restrictions). The ChOptima is great in a lot of ways, but isn't CE approved and as such isn't officially supported in Europe. I know you have one so it would be interesting to hear your experiences especially in Europe]

4h is generally accepted and this is what is taught during MOD1/2/3 as well. Might want to reach out Dive Rite directly or @DiveTucson (Ben) for details. EAC is popular in US it seems but this could be due to sorb prices over the pond. I am yet to dive one.

Only place I did in Europe (hate cold water....) was Gozo - zero issues. Otherwise it works like a charm, build is amazing as its real simple, very few hoses or things sticking out, in fact so simple I am looking into servicing myself now, including the reg. Was thinking flying US for a weekend (lots of cheapo flights in the winter), but DYI route looks more and more appealing ;] That said, after two years without any service and about 150+ hours, did not need one yet, it looks almost perfect...all I've done was to re-grease DSV so far, which takes about 10 minutes. Same cells as Revo, in fact I am using those now, better than AI in my opinion. Only thing I do not like is the sorb dust filter, as it falls apart very quickly, but hey, got a bunch of filters for Revo and a pair of scissors, that sorted the issue xD
Also in UK speak to Narked@90 - think they used to be Dive Rite service center.

Cylinder wise grab Divesoft one - 2.6kg steel, 232 bar, 2L. Made custom for them, and only sold in Europe. Pair with Nautec (this one, handle is perfectly aligned to body then; email Nautec if you want green handle on G5/8 - S Valve / Air 232 / M18 / SportLine | NAUTEC) and you got yourself 10kg max to carry with you. That is if you want to bring a cylinder with you.
But then BA is probably the only airline in Europe still allowing for 23kg (or unlimited) hand baggage...unlike on the continent where 7/8 kg is now the norm :/

As for scrubber, easy 5h+ in 30 degree water if needs be. But then again, why risk your life for <10 Euros of sorb...anything deeper I stick to 4h, shallow stuff quite a bit longer. Never really pushed it but even after the "longer" time it was breathing fine.

CE is not an issue so far, as using as private individual so perfectly legal (no commercial usage) - maybe in countries like France as they seem to like to enforce that M26 stuff but then just get an adapter for fill and take it off afterwards xD Only real limit so far is DAN not allowing for any modifications to non-CE rebreather insurance wise - basically dive as it was built more or less. So no solid state mod for me. But then you are living in a Brexitland so maybe that's not a problem.

 

[Tracy]

I really tried to find a specification for loose 'sorb with ChOptima. Their manual only mentions 4h for the ExtendAir cartridges but does not mention loose sorb. I would really like to see the spec for that, especially using "standard" Sofnolime.

[I'm very interested in chestmount for travelling (lightweight) and cave diving (pushing it ahead in restrictions). The ChOptima is great in a lot of ways, but isn't CE approved and as such isn't officially supported in Europe. I know you have one so it would be interesting to hear your experiences especially in Europe]

The testing was performed with extendair cartridges as it takes the diver packing it out of the equation. Loose sorb allows for packing differences which influence useful life. The estimates are conservative to account for this. I have probably used less than a dozen cartridges in my last 10 years diving the Optima. I pack with whatever granular sorb is available. Generally Intersorb 812 but sometime Sofnolime 797 depending on what is available locally.
Optima/Choptima scrubber holds 5.5 pounds.

 

[Capt Jim Wyatt]

I use EACs almost exclusively in my Choptima. The possibility of a caustic is a LOT less with an EAC. The possibility of channeling is virtually NIL. They are more expensive than loose granular sorb. One of the things we should all recall about rebreather diving is: Don't be cheap.

 

[lostsheep]

That difficult to obtain and expensive disposable scrubber cartridge - ExpendAir? Imagine flying somewhere for long dives and having to bring those cartridges with you; adds to the travel weight.

The ExtendAir cartridges are 3x the price of Sofnolime (£300 for 8 plus tax, import duties, delivery compared with £100 for one 20kg/44lb tub of Sofnolime)

Or fill it with sorb but have an undefined but far shorter scrubber duration, 2h30?

Will it ever be CE approved? If it were, we'd know the scrubber duration like the FX-CCR and Triton.

---

@EE-JIT -- are you specifically interested in a chestmount rebreather?

We all know that you were eluding to the EACs, I was being flippant.

Being ABLE to use a proprietary scrubber is not the same as being REQUIRED to use a proprietary scrubber.

As others have pointed out, granular sorb works just fine.