cell holders within counterlung

tibby · 20th June 2008, 18:23

The 4th cell option offered by ISC on Megs is a K1D mounted in the inhale CL (modified). The holder is machined to fit in the ISC ADV port. I have one but never used so I have no idea how well it works.
Tibby

HayCol · 20th June 2008, 23:35

Hi,

I use a DS-3 cell holder in my CCR Dolphin. It is protected by a length of plastic pipe with holes drilled in similar to the one sold by Narked@90. The P-port is positioned in the left hand, side wall of the inhale CL (in the diving position) so that the cell holder sits horizontally.

The system has worked well except once when I put the cells in facing upwards, as has been mentioned this results in poor O2 readings. On my Rebreather the O2 feed goes through the dosage unit so I do get a small (and predictable) variation in the readings between the cells when I inject.

The only thing I would consider doing differently on another conversion would be to put the cell holder on the opposite side of the CL next to the inhale connector.

Regards,
Colin.

mwenner · 21st June 2008, 00:09

Quote: (Originally Posted by AD_ward9)

There is a moisture barrier, but droplets will sit on the cell surface if they are facing upwards and they will have an extremely long response time. It is important they are not in a position where they face up or where there is a well that collects water and not drain out.

Blowing diluent on them may force water through the membrane if it is done hard enough. They only stand water with about 2lb of pressure, and a fast jet of gas will be more than that at the point it impinges.

Alex

Thanks Alex, I did go the Narked/GRP website, and do see some nice work there, and the 3 cell holder is a space saver. I appreciate the info on gas injection and position of the sensors. It's hard to re invent the wheel when there's so many masterminds beating a nice path to it.

20th June 2008, 18:23	#11 (permalink)
tibby untitled Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: May 2007 Location: Salt Lake City, UT Posts: 338	Re: cell holders within counterlung The 4th cell option offered by ISC on Megs is a K1D mounted in the inhale CL (modified). The holder is machined to fit in the ISC ADV port. I have one but never used so I have no idea how well it works. Tibby __________________ Does the voice of reason change when you add helium to the mix?...hmm
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20th June 2008, 23:35	#12 (permalink)
HayCol New Member Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: Oct 2007 Location: Coventry UK Posts: 5	Re: cell holders within counterlung Hi, I use a DS-3 cell holder in my CCR Dolphin. It is protected by a length of plastic pipe with holes drilled in similar to the one sold by Narked@90. The P-port is positioned in the left hand, side wall of the inhale CL (in the diving position) so that the cell holder sits horizontally. The system has worked well except once when I put the cells in facing upwards, as has been mentioned this results in poor O2 readings. On my Rebreather the O2 feed goes through the dosage unit so I do get a small (and predictable) variation in the readings between the cells when I inject. The only thing I would consider doing differently on another conversion would be to put the cell holder on the opposite side of the CL next to the inhale connector. Regards, Colin.
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21st June 2008, 00:09	#13 (permalink)
mwenner New Member Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: Aug 2006 Location: Nashville, TN Posts: 12	Re: cell holders within counterlung Quote: (Originally Posted by AD_ward9) There is a moisture barrier, but droplets will sit on the cell surface if they are facing upwards and they will have an extremely long response time. It is important they are not in a position where they face up or where there is a well that collects water and not drain out. Blowing diluent on them may force water through the membrane if it is done hard enough. They only stand water with about 2lb of pressure, and a fast jet of gas will be more than that at the point it impinges. Alex Thanks Alex, I did go the Narked/GRP website, and do see some nice work there, and the 3 cell holder is a space saver. I appreciate the info on gas injection and position of the sensors. It's hard to re invent the wheel when there's so many masterminds beating a nice path to it.
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