Meg Radial Scrubber Test report

cedricverdier · 17th August 2006, 01:36

Quote: (Originally Posted by schford)

I agree with Iain though - article should be titled Meg Radial Scrubber Review...
Stuart

Hi,

Sorry if my english is not perfect. I'll do better next time (or do I stop writing in english?

)

and to answer other questions:

- no idea about the price

- Leon provided me with some limited data about his CE testing, but he is the one who could publish them, not me.

- no noticeable difference in WOB between the axial and radial scrubber

Cheers

Johan · 17th August 2006, 21:25

11 hours!! Sounds pretty impressive. Think I remember that you mentioned that you suffered hypercapnia after 6 hours on the regular meg scrubber. Is the radial scrubber much bigger or is it just the radial geometry that makes it so much more efficient.

James · 17th August 2006, 21:38

Is it just steel mesh for the side of the scrubber or is there some kind of filter/membrane to stop water & softnolime dust?

I think the cis lunar scrubber (which this is based on) had some kind of membrane as well as steel mesh to stop water getting to the scrubber material.

James.

cedricverdier · 17th August 2006, 23:43

Johan,

The Radial scrubber is quite bigger than the standard axial (7.5lbs) but the design also clearly improves the performance.

James,

The scrubber is made of SS mesh.The Cis Lunar scrubber had also a hydrophobic membrane. Leon said he also designed a similar membrane for the radial scrubber. Could also be a nice feature to have...

Cheers

E-man · 18th August 2006, 00:01

Nice report. Thanks to you Cedric. But as stated would MUCH rather see hard data under controlled conditions. Pretty decent amount of lime too 3.4kg

RonMicjan · 18th August 2006, 05:05

Hey Cedric, nice write up, I have been diving the first pre prototype of this unit for over a year now and really like it. I have run up over 9 hours on the unit and up to a depth of 400 fsw. As Cedric (and Leon) says, you must pack this canister like concrete and it is very time consuming. the work of breathing is like non-existant with excellent duration, and the machine data reflects this also. It is easier to pack and close than the old Cis Lunar unit, with only one fat O ring instead of 5, no little nylon screws to lose or strip and a simple cog system for dogging down the lid, similar to locking the bolt on a rifle. The unit holds 7.5 lbs of material compared to the Cis canister holding 5.5 lbs, the reason for the additional material is the absence of the hydrophobic membrane, which is folded or corragated (for more surface area, sort of like your auto air filter) between the outer and inner walls, taking up quite a bit of volume. There is an effort to build a radial with the membrane, but it is not a high priority at this time.

catching up to the prism, yup, this would be the third time its been lapped!! The prism scrubber is a toy compared to this.

dive2dive2000 · 18th August 2006, 05:54

Quote: (Originally Posted by RonMicjan)

Hey Cedric, nice write up, I have been diving the first pre prototype of this unit for over a year now and really like it. I have run up over 9 hours on the unit and up to a depth of 400 fsw. As Cedric (and Leon) says, you must pack this canister like concrete and it is very time consuming. the work of breathing is like non-existant with excellent duration, and the machine data reflects this also. It is easier to pack and close than the old Cis Lunar unit, with only one fat O ring instead of 5, no little nylon screws to lose or strip and a simple cog system for dogging down the lid, similar to locking the bolt on a rifle. The unit holds 7.5 lbs of material compared to the Cis canister holding 5.5 lbs, the reason for the additional material is the absence of the hydrophobic membrane, which is folded or corragated (for more surface area, sort of like your auto air filter) between the outer and inner walls, taking up quite a bit of volume. There is an effort to build a radial with the membrane, but it is not a high priority at this time.

catching up to the prism, yup, this would be the third time its been lapped!! The prism scrubber is a toy compared to this.

Oh, let the banter begin

Now that all the ISC (Leon) and Diver ass kissing

is over, how about some sats instead of opinions? I fail to see the advantage of a Radial scrubber in a Meg because of its gas flow direction. BUt with you and Cedrics right ups obviously I am misunderstanding the releavance of gas direction and radial scrubbers, or am I? Please inlighten me

Mdemon · 18th August 2006, 10:26

Many thanks for posting the picture Cedric - could we see the ends too please?

I would love to see you use the colour-changing sofnalime and taking a picture of the result. I would like to see this because I want to know if the slime is used up evenly from one end to the other, or whether there is more use at the end where the gas is drawn out.

On the hydrophobic membrane thing, wouldn't it be easier to make a sack out of the membrane and put the scrubber in it? With a drawstring/elastic ring at the top? Would be very quick to make/fit/replace and cheap too.

Just a thought...

***schford*** · 18th August 2006, 11:29

Quote: (Originally Posted by dive2dive2000)

I fail to see the advantage of a Radial scrubber in a Meg because of its gas flow direction.

There are pros and cons for both directions - Let me see if I can dig up the thread we discussed it before...

Stuart

dive2dive2000 · 18th August 2006, 14:44

Quote: (Originally Posted by schford)

There are pros and cons for both directions - Let me see if I can dig up the thread we discussed it before...

Stuart

hi Stuart,

I remember that thread, Don't remember if Cedric or Ron had taken part in it???

BTW How was the Honymoon?

17th August 2006, 01:36	#11 (permalink)
cedricverdier S21 M.I.B. Current Rebreather/s: Evolution Megalodon Other Rebreather/s: Not Bought Yet Inspiration Classic Inspiration Vision Sport Kiss Classic Kiss Join Date: Apr 2005 Location: Worldwide! Posts: 498	Re: Meg Radial Scrubber Test report Quote: (Originally Posted by schford) I agree with Iain though - article should be titled Meg Radial Scrubber Review... Stuart Hi, Sorry if my english is not perfect. I'll do better next time (or do I stop writing in english? ) and to answer other questions: - no idea about the price - Leon provided me with some limited data about his CE testing, but he is the one who could publish them, not me. - no noticeable difference in WOB between the axial and radial scrubber Cheers __________________ Cedric Verdier PADI Course Director, ANDI-IANTD-PSAI-TDI-DSAT-DAN-NAUI-CMAS Instructor Trainer Trimix (CCR and OC) and Cave Diving Instructor Trainer www.CedricVerdier.com DIRrebreather member
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17th August 2006, 21:25	#12 (permalink)
Johan New Member Current Rebreather/s: Evolution Dolphin Other Rebreather/s: Dolphin Join Date: Jan 2006 Location: London Posts: 15	Re: Meg Radial Scrubber Test report 11 hours!! Sounds pretty impressive. Think I remember that you mentioned that you suffered hypercapnia after 6 hours on the regular meg scrubber. Is the radial scrubber much bigger or is it just the radial geometry that makes it so much more efficient. __________________ http://www.tacticaldiving.com
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17th August 2006, 21:38	#13 (permalink)
James New Member Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: May 2005 Location: UK Posts: 59	Re: Meg Radial Scrubber Test report Is it just steel mesh for the side of the scrubber or is there some kind of filter/membrane to stop water & softnolime dust? I think the cis lunar scrubber (which this is based on) had some kind of membrane as well as steel mesh to stop water getting to the scrubber material. James.
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17th August 2006, 23:43	#14 (permalink)
cedricverdier S21 M.I.B. Current Rebreather/s: Evolution Megalodon Other Rebreather/s: Not Bought Yet Inspiration Classic Inspiration Vision Sport Kiss Classic Kiss Join Date: Apr 2005 Location: Worldwide! Posts: 498	Re: Meg Radial Scrubber Test report Johan, The Radial scrubber is quite bigger than the standard axial (7.5lbs) but the design also clearly improves the performance. James, The scrubber is made of SS mesh.The Cis Lunar scrubber had also a hydrophobic membrane. Leon said he also designed a similar membrane for the radial scrubber. Could also be a nice feature to have... Cheers __________________ Cedric Verdier PADI Course Director, ANDI-IANTD-PSAI-TDI-DSAT-DAN-NAUI-CMAS Instructor Trainer Trimix (CCR and OC) and Cave Diving Instructor Trainer www.CedricVerdier.com DIRrebreather member
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18th August 2006, 00:01	#15 (permalink)
E-man On the loop! Current Rebreather/s: Inspiration Classic Optima Other Rebreather/s: Titan Join Date: Sep 2005 Location: Eastern Coast ;) Posts: 212	Re: Meg Radial Scrubber Test report Nice report. Thanks to you Cedric. But as stated would MUCH rather see hard data under controlled conditions. Pretty decent amount of lime too 3.4kg
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18th August 2006, 05:05	#16 (permalink)
RonMicjan Cap Ron scourge of the NW Current Rebreather/s: Megalodon Dolphin Home Build Other Rebreather/s: Sport Kiss Classic Kiss Dolphin Home Build Join Date: Feb 2005 Location: Cape Disapointment, The Graveyard of the Pacific Posts: 1,120	Re: Meg Radial Scrubber Test report Hey Cedric, nice write up, I have been diving the first pre prototype of this unit for over a year now and really like it. I have run up over 9 hours on the unit and up to a depth of 400 fsw. As Cedric (and Leon) says, you must pack this canister like concrete and it is very time consuming. the work of breathing is like non-existant with excellent duration, and the machine data reflects this also. It is easier to pack and close than the old Cis Lunar unit, with only one fat O ring instead of 5, no little nylon screws to lose or strip and a simple cog system for dogging down the lid, similar to locking the bolt on a rifle. The unit holds 7.5 lbs of material compared to the Cis canister holding 5.5 lbs, the reason for the additional material is the absence of the hydrophobic membrane, which is folded or corragated (for more surface area, sort of like your auto air filter) between the outer and inner walls, taking up quite a bit of volume. There is an effort to build a radial with the membrane, but it is not a high priority at this time. catching up to the prism, yup, this would be the third time its been lapped!! The prism scrubber is a toy compared to this. __________________ Marine rescue, towing and salvage. Interfering with natural selection since 1983. www.tmishop.com Diving bits etc. www.seatowpdx.com The Summer Job
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18th August 2006, 05:54	#17 (permalink)
dive2dive2000 PRISM DIVER & LUVIN IT! Current Rebreather/s: Prism Topaz Other Rebreather/s: Join Date: Feb 2005 Location: Long Island, NY Posts: 796	Re: Meg Radial Scrubber Test report Quote: (Originally Posted by RonMicjan) Hey Cedric, nice write up, I have been diving the first pre prototype of this unit for over a year now and really like it. I have run up over 9 hours on the unit and up to a depth of 400 fsw. As Cedric (and Leon) says, you must pack this canister like concrete and it is very time consuming. the work of breathing is like non-existant with excellent duration, and the machine data reflects this also. It is easier to pack and close than the old Cis Lunar unit, with only one fat O ring instead of 5, no little nylon screws to lose or strip and a simple cog system for dogging down the lid, similar to locking the bolt on a rifle. The unit holds 7.5 lbs of material compared to the Cis canister holding 5.5 lbs, the reason for the additional material is the absence of the hydrophobic membrane, which is folded or corragated (for more surface area, sort of like your auto air filter) between the outer and inner walls, taking up quite a bit of volume. There is an effort to build a radial with the membrane, but it is not a high priority at this time. catching up to the prism, yup, this would be the third time its been lapped!! The prism scrubber is a toy compared to this. Oh, let the banter begin Now that all the ISC (Leon) and Diver ass kissing is over, how about some sats instead of opinions? I fail to see the advantage of a Radial scrubber in a Meg because of its gas flow direction. BUt with you and Cedrics right ups obviously I am misunderstanding the releavance of gas direction and radial scrubbers, or am I? Please inlighten me __________________ Safe Diving, Martin
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18th August 2006, 10:26	#18 (permalink)
Mdemon SiegeEngine II Current Rebreather/s: Inspiration Classic Home Build Other Rebreather/s: Inspiration Classic Home Build Join Date: Feb 2007 Location: SWUK Posts: 1,946	Re: Meg Radial Scrubber Test report Many thanks for posting the picture Cedric - could we see the ends too please? I would love to see you use the colour-changing sofnalime and taking a picture of the result. I would like to see this because I want to know if the slime is used up evenly from one end to the other, or whether there is more use at the end where the gas is drawn out. On the hydrophobic membrane thing, wouldn't it be easier to make a sack out of the membrane and put the scrubber in it? With a drawstring/elastic ring at the top? Would be very quick to make/fit/replace and cheap too. Just a thought... __________________ www.southwestmafia.com "small minds talk about people, Average Minds Talk About Events, GREAT MINDS TALK ABOUT IDEAS!" The WRONG Attitude will get you killed. "Once the agenda-monkeys and perfect-worlders have moved on, perhaps we can do some diving?"
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18th August 2006, 11:29	#19 (permalink)
*schford* RBW Founder Current Rebreather/s: Megalodon Sport Kiss Other Rebreather/s: Join Date: Jan 2005 Location: UK Posts: 3,564	Re: Meg Radial Scrubber Test report Quote: (Originally Posted by dive2dive2000) I fail to see the advantage of a Radial scrubber in a Meg because of its gas flow direction. There are pros and cons for both directions - Let me see if I can dig up the thread we discussed it before... Stuart __________________ Bailout and Kit Management account for Murphy's Law The only bad question is one you did not ask and later wish you had. Use of RBW is subject to the Rebreather World Terms & Conditions of Use
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18th August 2006, 14:44	#20 (permalink)
dive2dive2000 PRISM DIVER & LUVIN IT! Current Rebreather/s: Prism Topaz Other Rebreather/s: Join Date: Feb 2005 Location: Long Island, NY Posts: 796	Re: Meg Radial Scrubber Test report Quote: (Originally Posted by schford) There are pros and cons for both directions - Let me see if I can dig up the thread we discussed it before... Stuart hi Stuart, I remember that thread, Don't remember if Cedric or Ron had taken part in it??? BTW How was the Honymoon? __________________ Safe Diving, Martin
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