Question SCR Semi Closed Rebreather

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Are ther Revo4 plans confirmed @grantctobin?
I’m out of that loop I’m afraid. I do believe the Horizon was a playground for some things that’ll pop out of a future unit, but I don’t know anyone personally at Mares.
 
The WKPP, OCDA, a couple of KUR, and all users of the Tres Presidentes and similar units would disagree. They’re a niche item, and the wrong path for OP, but your post is silly and errant.

Then there’s the Drager series, the GEM, and the pockets of Horizons (hopefully some of whose features make it to the REVO4).
It was a light overview for someone with little knowledge of S/CCR and not the ins and outs of a duck's arse.

Of course some people use SCR. Those esoteric types who have that tiny specialist niche requirement.

The rest of us use CCR. Or OC.
 
DUDE!

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Long shallow dives with a 40 sounds like a good niche. Packing a scrubber and cleaning hoses etc is not that much work.
 
Long shallow dives with a 40 sounds like a good niche. Packing a scrubber and cleaning hoses etc is not that much work.
How shallow is shallow? A 40-60ft reef for 90min sounds amazing for photography.

How much work is packing a scrubber and cleaning hoses? It doesn't sound like that much work.
 
How shallow is shallow? A 40-60ft reef for 90min sounds amazing for photography.
40' and above has lots to see and is the case for many shore dives. A bit warmer air would be nice as well in California waters.

The work and ease varies between rebreathers, SCR or CCR.
 
How shallow is shallow? A 40-60ft reef for 90min sounds amazing for photography.

How much work is packing a scrubber and cleaning hoses? It doesn't sound like that much work.
An hour and you have to be pedantic as your life and health depend upon it. After every day you need to flush the loop and lungs with water. Periodically, weekly, you have to wash out the unit with disinfectant. Every time you build it you need to run through a checklist. You need to ensure the oxygen sensors work and have spares available.

CCR/SCR is a completely different mindset than on open circuit where a quick rinse will suffice.
 
An hour and you have to be pedantic as your life and health depend upon it. After every day you need to flush the loop and lungs with water. Periodically, weekly, you have to wash out the unit with disinfectant. Every time you build it you need to run through a checklist. You need to ensure the oxygen sensors work and have spares available.

CCR/SCR is a completely different mindset than on open circuit where a quick rinse will suffice.

Welp, that's exactly why I asked my question of how much work. I definitely do not have that time right now, I have a toddler and hoping for a second one in the near future.

This thread has definitely been a valuable learning experience for me. The dream of one day getting a ccr is still there but the reality is that I'm most likely 5+ years away from even really considering getting one.
 
How nice will it be when cheap little used Horizons hit the market screaming for conversion
The thing I find crazy about the horizon SCRs (purely based on website, not personal experience) is they cost MORE than a bare bones Triton CCR... I would personally never recommend getting a Triton without a petrel, nerd or ideally both computers together, but ironically the Horizon version of a simple eSCR is FAR more complicated and electronics dependent than my Triton mCCR...
 
An hour and you have to be pedantic as your life and health depend upon it. After every day you need to flush the loop and lungs with water. Periodically, weekly, you have to wash out the unit with disinfectant. Every time you build it you need to run through a checklist. You need to ensure the oxygen sensors work and have spares available.

CCR/SCR is a completely different mindset than on open circuit where a quick rinse will suffice.
It seems like you think the only SCR out there is the horizon. For the horizon, much of your argument is valid, for an RB80, clones, or GEM, not so much.

The horizon, being electronically controlled is, I agree, the same complication as a CCR with little benefit. ( it does eliminate ox tox, but that's about it. )

Mechanical SCRs like the RB80 and GEM are incredibly simple, calling them complex is misleading at best. They are a can, bags and a 2nd stage regulator(s). That's it, no solenoid, electronics, ect. required for use.

My GEM takes less than 30 mins to set up from storage. if I am changing sorb and doing a rinse between days, 15 min. The loop does not need to be rinsed every day, every other day, yes, but it only needs a rinse with a sorb change if your diving every day. Taking it apart every day is only increasing you chances of having an issue. I find I can set a rig up and dive it for two days on the gas and sorb from setup.

Unlike a CCR, mechanical SCR's O2 sensor can be validated as you kit up, while you are starting your dive and during the dive. Your FIO2 is always a known, if it looks off you flush by breathing out your nose and get instant verification . This simple fact makes SCR quit a bit safer than CCR. I fact, there really isn't much stopping you from using it with a failed O2 sensor. Backup computer has fixed Fio2 and TTS it is typically pretty close to the one with the sensor. (+10-15 min on 120 min dive)

There is a reason the RB80 is still used for serious diving, it's simplicity and inherent safety trumps that of even an mCCR, it does cost more for gas but this site is filed with rants against saving money while risking lives.(that's a choice you need to make) I'm not saying SCF is the best, but it is not all the risk of CCR with no benefits. It is less risk than CCR with a mild increase in deco obligations, and mild can be nil in many/most cases.
 
https://www.shearwater.com/products/perdix-ai/

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