O2 sensor test pot

cedricverdier · 14th September 2006, 00:50

Hi all,

Looking at the very interesting article written by Sabgia:
http://www.rebreatherworld.com/megal...tion#post66687

I was wondering if someone has already built a pressure pot that could allow to test O2 sensors at a pO2 greater than 1.0

Cheers

heyydude · 14th September 2006, 02:07

Hi Cedric,

We use them all the time in our shop. We have built a couple of dozen for others to use. At one point, we considered building them for general sale. but I wasn't sure how many people would take the time to use them.

Kevin Juergensen
Juergensen Marine.

Gibbon · 14th September 2006, 03:05

Quote: (Originally Posted by heyydude)

Hi Cedric,

We use them all the time in our shop. We have built a couple of dozen for others to use. At one point, we considered building them for general sale. but I wasn't sure how many people would take the time to use them.

Kevin Juergensen
Juergensen Marine.

Kevin,

Do you have any concerns over the speed of depressurisation causing damage to the O2 Cells?

Do you use air as well as O2?

Cheers,

Jon

heyydude · 14th September 2006, 03:15

Well, yes and no. I've blown up a few sensors in my time, but generally we rarely see it anymore. One of my early pots was built in 1995 or so, and I remember blowing up some of Mike Iswalt's sensors in it by pulling off the pressure fitting - the sensors spewed KOH all over the inside of the pot, which damaged the Aluminum. Cost me a bundle too, since I had to buy 3 more sensors...

But we use real sensors routinely in our shop, and have no problems with pressurizing them to 3 ATA over and over again.

Kevin Juergensen
Juergensen Marine.

heyydude · 14th September 2006, 03:21

Oh sorry - I should have read all your post. We don't use Air because the pressure would be too great to achieve higher ppO2's. You probably WOULD do more damage to the sensors by decompressing them from 6 ATM's or better.

Kevin.

Silent · 14th September 2006, 03:41

Quote: (Originally Posted by cedricverdier)

Hi all,

Looking at the very interesting article written by Sabgia:
http://www.rebreatherworld.com/megal...tion#post66687

I was wondering if someone has already built a pressure pot that could allow to test O2 sensors at a pO2 greater than 1.0

Cheers

Hi Cedric,

John Routley (Narked@90) and myself have been working on building one of these for commercial sale.

PM John for more details.

Cheers,

Neil

narked at 90 · 14th September 2006, 18:54

Hi every one, as neil has said we have been working on a cell checker for comercal release and it will have CE aproval.
the unit is a stand alone cell checker that will take your cells upto 2 bar and has built in safegards to stop the cells from bending.
you can also plug the cell checker in to your rebreather and see po2 in real time but the cell checker dose have built in meters so you dont have to if you so wish.
we did build one for the inspo that was a plug and play checker but the worry was the hand sets may not be able to handle the back pressure http://www.narkedat90.co.uk/37.html so the new one is a generic cell checker that will except all types of sensers and can be plugged into any rebreather

kind regards john routley
Welcome Page

***schford*** · 14th September 2006, 19:03

I think these are a great idea - Leon has an awsome one at ISC which is big enough to fit the whole Meg head in.

So you can check out the depth sensors / where the cells are current limited and how your deco algo is working.

Stuart

heyydude · 14th September 2006, 19:31

CE Certified.... Heh, heh... I had to chuckle about that. No offence, of course, I was just remembering one time when I was trying to test some higher pressure stuff, and was watching the gage VERY closely (like 3" away) when "BOOM!!!" the damn thing blew up, scattering pieces of itself ALL OVER the shop (and nicking the ceiling to boot).

"Holy Cow!" said I (well, "Cow" isn't exactly right). Nothing touched me - not one tiny fragment.

So, I figured I just had a weak pot, and set up another one (I'm not lying here) - sure enough, I'm about 6" away from this one (I learned my lesson earlier), when "BOOM!!!!" this second one blew up in my face.

Again, I was untouched.

Turns out, I had a bad pressure gage, and was pumping this thing way up past where it was happy...

And what lesson did I learn from this experience?

Well, I learned that I am invincible...

Kevin Juergensen
Juergensen Marine.

narked at 90 · 14th September 2006, 19:41

Hi kevin lol you lucky bugger! did you not have a safty opv fitted?
kind regards john

Welcome Page

Quote: (Originally Posted by heyydude)

CE Certified.... Heh, heh... I had to chuckle about that. No offence, of course, I was just remembering one time when I was trying to test some higher pressure stuff, and was watching the gage VERY closely (like 3" away) when "BOOM!!!" the damn thing blew up, scattering pieces of itself ALL OVER the shop (and nicking the ceiling to boot).

"Holy Cow!" said I (well, "Cow" isn't exactly right). Nothing touched me - not one tiny fragment.

So, I figured I just had a weak pot, and set up another one (I'm not lying here) - sure enough, I'm about 6" away from this one (I learned my lesson earlier), when "BOOM!!!!" this second one blew up in my face.

Again, I was untouched.

Turns out, I had a bad pressure gage, and was pumping this thing way up past where it was happy...

And what lesson did I learn from this experience?

Well, I learned that I am invincible...

Kevin Juergensen
Juergensen Marine.

14th September 2006, 00:50	#1 (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	O2 sensor test pot Hi all, Looking at the very interesting article written by Sabgia: http://www.rebreatherworld.com/megal...tion#post66687 I was wondering if someone has already built a pressure pot that could allow to test O2 sensors at a pO2 greater than 1.0 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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14th September 2006, 02:07	#2 (permalink)
heyydude King of the Geeks Current Rebreather/s: MK 15.X Optima Other CCR Other Rebreather/s: Other CCR Join Date: May 2005 Location: Addison, Pennsylvania Posts: 380	Re: O2 sensor test pot Hi Cedric, We use them all the time in our shop. We have built a couple of dozen for others to use. At one point, we considered building them for general sale. but I wasn't sure how many people would take the time to use them. Kevin Juergensen Juergensen Marine.
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14th September 2006, 03:05	#3 (permalink)
Gibbon Southern Monkey Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Aug 2005 Location: East Devon Posts: 224	Re: O2 sensor test pot Quote: (Originally Posted by heyydude) Hi Cedric, We use them all the time in our shop. We have built a couple of dozen for others to use. At one point, we considered building them for general sale. but I wasn't sure how many people would take the time to use them. Kevin Juergensen Juergensen Marine. Kevin, Do you have any concerns over the speed of depressurisation causing damage to the O2 Cells? Do you use air as well as O2? Cheers, Jon
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14th September 2006, 03:15	#4 (permalink)
heyydude King of the Geeks Current Rebreather/s: MK 15.X Optima Other CCR Other Rebreather/s: Other CCR Join Date: May 2005 Location: Addison, Pennsylvania Posts: 380	Re: O2 sensor test pot Well, yes and no. I've blown up a few sensors in my time, but generally we rarely see it anymore. One of my early pots was built in 1995 or so, and I remember blowing up some of Mike Iswalt's sensors in it by pulling off the pressure fitting - the sensors spewed KOH all over the inside of the pot, which damaged the Aluminum. Cost me a bundle too, since I had to buy 3 more sensors... But we use real sensors routinely in our shop, and have no problems with pressurizing them to 3 ATA over and over again. Kevin Juergensen Juergensen Marine.
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14th September 2006, 03:21	#5 (permalink)
heyydude King of the Geeks Current Rebreather/s: MK 15.X Optima Other CCR Other Rebreather/s: Other CCR Join Date: May 2005 Location: Addison, Pennsylvania Posts: 380	Re: O2 sensor test pot Oh sorry - I should have read all your post. We don't use Air because the pressure would be too great to achieve higher ppO2's. You probably WOULD do more damage to the sensors by decompressing them from 6 ATM's or better. Kevin.
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14th September 2006, 03:41	#6 (permalink)
Silent Staying Silent! Mostly... Current Rebreather/s: Other CCR Other Rebreather/s: Megalodon Ouroboros Other CCR Join Date: Jun 2005 Location: Northants, UK Posts: 383	Re: O2 sensor test pot Quote: (Originally Posted by cedricverdier) Hi all, Looking at the very interesting article written by Sabgia: http://www.rebreatherworld.com/megal...tion#post66687 I was wondering if someone has already built a pressure pot that could allow to test O2 sensors at a pO2 greater than 1.0 Cheers Hi Cedric, John Routley (Narked@90) and myself have been working on building one of these for commercial sale. PM John for more details. Cheers, Neil __________________ On the dark side everyone can hear you scream......
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14th September 2006, 18:54	#7 (permalink)
narked at 90 John Routley Current Rebreather/s: Inspiration Classic Other CCR Dolphin Home Build Other Rebreather/s: Other CCR Dolphin Home Build Join Date: Feb 2005 Location: middlands uk Posts: 1,077	Re: O2 sensor test pot Hi every one, as neil has said we have been working on a cell checker for comercal release and it will have CE aproval. the unit is a stand alone cell checker that will take your cells upto 2 bar and has built in safegards to stop the cells from bending. you can also plug the cell checker in to your rebreather and see po2 in real time but the cell checker dose have built in meters so you dont have to if you so wish. we did build one for the inspo that was a plug and play checker but the worry was the hand sets may not be able to handle the back pressure http://www.narkedat90.co.uk/37.html so the new one is a generic cell checker that will except all types of sensers and can be plugged into any rebreather kind regards john routley Welcome Page __________________ *WWW.NARKEDAT90.CO.UK* *http://www.grpservices.com/pursuit/* Supporting Shearwater Research Products in Europe Narked at 90 Go Military
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14th September 2006, 19:03	#8 (permalink)
*schford* RBW Founder Current Rebreather/s: Megalodon Sport Kiss Other Rebreather/s: Join Date: Jan 2005 Location: UK Posts: 3,564	Re: O2 sensor test pot I think these are a great idea - Leon has an awsome one at ISC which is big enough to fit the whole Meg head in. So you can check out the depth sensors / where the cells are current limited and how your deco algo is working. 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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14th September 2006, 19:31	#9 (permalink)
heyydude King of the Geeks Current Rebreather/s: MK 15.X Optima Other CCR Other Rebreather/s: Other CCR Join Date: May 2005 Location: Addison, Pennsylvania Posts: 380	Re: O2 sensor test pot CE Certified.... Heh, heh... I had to chuckle about that. No offence, of course, I was just remembering one time when I was trying to test some higher pressure stuff, and was watching the gage VERY closely (like 3" away) when "BOOM!!!" the damn thing blew up, scattering pieces of itself ALL OVER the shop (and nicking the ceiling to boot). "Holy Cow!" said I (well, "Cow" isn't exactly right). Nothing touched me - not one tiny fragment. So, I figured I just had a weak pot, and set up another one (I'm not lying here) - sure enough, I'm about 6" away from this one (I learned my lesson earlier), when "BOOM!!!!" this second one blew up in my face. Again, I was untouched. Turns out, I had a bad pressure gage, and was pumping this thing way up past where it was happy... And what lesson did I learn from this experience? Well, I learned that I am invincible... Kevin Juergensen Juergensen Marine.
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14th September 2006, 19:41	#10 (permalink)
narked at 90 John Routley Current Rebreather/s: Inspiration Classic Other CCR Dolphin Home Build Other Rebreather/s: Other CCR Dolphin Home Build Join Date: Feb 2005 Location: middlands uk Posts: 1,077	Re: O2 sensor test pot Hi kevin lol you lucky bugger! did you not have a safty opv fitted? kind regards john Welcome Page Quote: (Originally Posted by heyydude) CE Certified.... Heh, heh... I had to chuckle about that. No offence, of course, I was just remembering one time when I was trying to test some higher pressure stuff, and was watching the gage VERY closely (like 3" away) when "BOOM!!!" the damn thing blew up, scattering pieces of itself ALL OVER the shop (and nicking the ceiling to boot). "Holy Cow!" said I (well, "Cow" isn't exactly right). Nothing touched me - not one tiny fragment. So, I figured I just had a weak pot, and set up another one (I'm not lying here) - sure enough, I'm about 6" away from this one (I learned my lesson earlier), when "BOOM!!!!" this second one blew up in my face. Again, I was untouched. Turns out, I had a bad pressure gage, and was pumping this thing way up past where it was happy... And what lesson did I learn from this experience? Well, I learned that I am invincible... Kevin Juergensen Juergensen Marine. __________________ *WWW.NARKEDAT90.CO.UK* *http://www.grpservices.com/pursuit/* Supporting Shearwater Research Products in Europe Narked at 90 Go Military
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