Ferg3333

1. Why is the pack mounted on springs?

To keep the scrubber packed, it is a self packing design provided you put enough lime in....

2. Don't they go BANG as a diver lands in the water, and cause the O ring to break it's seal?

It is secured by 4 bolts???

3. The Spacer Collar above the O ring seats in a bevelled channel, so will it not be displaced, and leak, even momentarily? Gas would rush PAST the scrubber, fuelled by the gas wavefront created by the piston-like cannister throw on that spring!

The sping keeps everything nice and tight, the o ring is slightly lubed to allow movement when putting the electronics on, and while it sits on the springs keeping the lime packed.

4. Why are there not additional seals around the belly or middle portion of the scrubber walls, so an O ring there would always make contact with both surfaces, regardless of travel magnitude? These would keep the alignment correct thereby maintaining seal integrity.

seal is already mantained.


5. Maybe there is no need to concern myself, as the CO2 is not kept on one side of the scrubber, but rather ABSORBED by the chemical reactions taking place in the material. But what about gas that bypasses the scrubber past the top O ring/collar seal?

No gas will bypass if set up correctly, unless you dont pack the lime properly and you get unfiltered gas through

Perhaps someone would be so kind as to share their experience with respect to the inevitable high impact (upon entries) on the scrubber for lets say a typical "giant stride" for example?

No problems they have sold 12000 units

6. How does the sprung Sofnolime Cannister not slop around?

it is completely encased and the springs are stiff to provide upthrust against the head

7. If water were to collect in the scrubber, then if inverted, would be allowed to wet the wiring, cells etc. So why is there not a watertight seal around the scrubber cannster? This would require ingress via the scrubber material itself, thereby maintaining vital function to continue unhindered.

The unit was designed about 10 years ago. It is very hard to completely flood a inspiration and its one of the more flood tolerant units on the market, you have that seal using the oring if gas cant pass neither can water


8. Why is there not a water sensor in teh bottom of the scrubber? It would be powered by it's own battery and simply activate a buzzer when the probes detect water level threshold.[/quote]

not needed you would hear water ingress before that point. Esp since your exhalation lung would be full of water or you would hear gas escaping if you had a hole in the breathing hoses.

I would suggest if you are looking at moving to ccr, discussing what the pros and cons of each unit are and if possible trying a few on to see how they feel in water and then if ccr is for you. Try and get the book Mastering Rebreathers by Jeff B