How long do Cells last in an unopened packet.....

***schford*** · 24th February 2007, 16:31

Well touch wood my cells have been good as gold as a result 3 spare ones I have are now 18 months old.....

Shoudl I chuck em or are they good - I have heard conflicting advice....

Thoughts?

Ta

Stuart

sensor330 · 24th February 2007, 17:05

3 years is what the company recommends.

Dinspiration · 24th February 2007, 17:08

Hi

There is no exact rule on this. The only way to figure it out is - open the packet and look for the MV output. The manufacturer (E.g. Teledyne) claims a shelf live for around 2 years for the R22D.

I had some O2 cells in an unopened packet completely dead 7 months after the production date. I also had a cell working fine after 12 months.

I change all cells together on a regular basis. This is at the end cheaper than buying a lot of spare cells which you can't use anymore.

Kind regards

DINspiration

RAL · 24th February 2007, 17:13

Quote: (Originally Posted by schford)

Well touch wood my cells have been good as gold as a result 3 spare ones I have are now 18 months old.....

Shoudl I chuck em or are they good - I have heard conflicting advice....

Thoughts?

Ta

Stuart

Best not chance it Stuart. I will dispose of them properly for you.

RAL

***schford*** · 24th February 2007, 17:19

Changing all cells together for too risky an undertaking for me IMHO......

I swap em when they die but check they hit 1.5+ on every dive....

Well I shall try em as I need to change 1 out which has died over last cpl of months of none use during periods of decorating!

jptaylor9 · 24th February 2007, 17:53

Quote: (Originally Posted by schford)

Well touch wood my cells have been good as gold as a result 3 spare ones I have are now 18 months old.....

The advise from AP is don'r use cells more than 12 - 18 months old, even if there still in the seal packaging. Personally, I'd chuck them.

***ScubaDadMiami*** · 24th February 2007, 18:10

Maybe not what you want to hear, but . . .

When I made the change over to CCR, I promised myself that I would not die from stupid things like pushing scubber or sensors. So, I swap out my sensors every year even if getting full expected millivolts and able to flush up to 1.5+ at 20 feet. When it's time, it's time.

I change one in month 10, one in month 11, and one in month 12 for the first year. Then, I change on the anniversary of the swap annually thereafter. I write the dates on each cell in permanent ink marker.

Moray Brown · 24th February 2007, 18:18

If in doubt, chuck em out! Not even worth the energy opening the packet

Dive safe!

***schford*** · 24th February 2007, 18:33

Still a dilemma :-)

Teledyne Analytical Instruments | Applications Tells us they are good for 36 months.....

Now if the manufacturer reckons they are good for 36 months and have been unopened ... what should I be wary of?

Actually I clicked on through and they say the shelf life is 24 months......

http://www.teledyne-ai.com/pdf/schem_b72149.pdf

Mdemon · 24th February 2007, 20:59

No dilemma Stuart. You're loaded! Buy some new ones when you need them.

In the mean time, pop them in the post to me and I promise to treasure them...

In all seriousness, if you do linearity checks without fail, and have another method of measuring PO2, then I don't see the problem. Swap them out when you're ready to buy some new ones.

You still have my address, btw?

24th February 2007, 16:31	#1 (permalink)
*schford* Despotic Overlord Current Rebreather/s: Megalodon Sport Kiss Other Rebreather/s: Join Date: Jan 2005 Location: London, UK Posts: 3,558	How long do Cells last in an unopened packet..... Well touch wood my cells have been good as gold as a result 3 spare ones I have are now 18 months old..... Shoudl I chuck em or are they good - I have heard conflicting advice.... Thoughts? Ta 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 Rebreather World is subject to the Rebreather World Terms & Conditions of Use
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24th February 2007, 17:05	#2 (permalink)
sensor330 Custom Title Allowed! Current Rebreather/s: Megalodon Other Rebreather/s: Not Bought Yet Inspiration Classic Join Date: Feb 2005 Location: Victoria, British Columbia, Canada Posts: 583	Re: How long do Cells last in an unopened packet..... 3 years is what the company recommends.
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24th February 2007, 17:08	#3 (permalink)
Dinspiration Custom Title Allowed! Current Rebreather/s: Inspiration Classic Other CCR Other Rebreather/s: Not Bought Yet Other CCR Join Date: Dec 2005 Location: Switzerland Posts: 209	Re: How long do Cells last in an unopened packet..... Hi There is no exact rule on this. The only way to figure it out is - open the packet and look for the MV output. The manufacturer (E.g. Teledyne) claims a shelf live for around 2 years for the R22D. I had some O2 cells in an unopened packet completely dead 7 months after the production date. I also had a cell working fine after 12 months. I change all cells together on a regular basis. This is at the end cheaper than buying a lot of spare cells which you can't use anymore. Kind regards DINspiration
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24th February 2007, 17:13	#4 (permalink)
RAL Longbottom Time Current Rebreather/s: Classic Kiss Other Rebreather/s: Join Date: Jan 2006 Location: North Florida Posts: 390	Re: How long do Cells last in an unopened packet..... Quote: (Originally Posted by schford) Well touch wood my cells have been good as gold as a result 3 spare ones I have are now 18 months old..... Shoudl I chuck em or are they good - I have heard conflicting advice.... Thoughts? Ta Stuart Best not chance it Stuart. I will dispose of them properly for you. RAL __________________ The sea does not care about you.
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24th February 2007, 17:19	#5 (permalink)
*schford* Despotic Overlord Current Rebreather/s: Megalodon Sport Kiss Other Rebreather/s: Join Date: Jan 2005 Location: London, UK Posts: 3,558	Re: How long do Cells last in an unopened packet..... Changing all cells together for too risky an undertaking for me IMHO...... I swap em when they die but check they hit 1.5+ on every dive.... Well I shall try em as I need to change 1 out which has died over last cpl of months of none use during periods of decorating! __________________ 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 Rebreather World is subject to the Rebreather World Terms & Conditions of Use
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24th February 2007, 17:53	#6 (permalink)
jptaylor9 Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Feb 2005 Location: London, UK Posts: 318	Re: How long do Cells last in an unopened packet..... Quote: (Originally Posted by schford) Well touch wood my cells have been good as gold as a result 3 spare ones I have are now 18 months old..... The advise from AP is don'r use cells more than 12 - 18 months old, even if there still in the seal packaging. Personally, I'd chuck them.
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24th February 2007, 18:10	#7 (permalink)
*ScubaDadMiami* Moderator Current Rebreather/s: Optima Other Rebreather/s: Join Date: Sep 2005 Location: Florida, USA Posts: 2,129	Re: How long do Cells last in an unopened packet..... Maybe not what you want to hear, but . . . When I made the change over to CCR, I promised myself that I would not die from stupid things like pushing scubber or sensors. So, I swap out my sensors every year even if getting full expected millivolts and able to flush up to 1.5+ at 20 feet. When it's time, it's time. I change one in month 10, one in month 11, and one in month 12 for the first year. Then, I change on the anniversary of the swap annually thereafter. I write the dates on each cell in permanent ink marker. __________________ Howard Packer IANTD CCR Instructor Miami Beach, Florida CCRDiveTraining.com
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24th February 2007, 18:18	#8 (permalink)
Moray Brown CCR Training - MR Diving Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Sep 2006 Location: WMUK Posts: 242	Re: How long do Cells last in an unopened packet..... If in doubt, chuck em out! Not even worth the energy opening the packet Dive safe!
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24th February 2007, 18:33	#9 (permalink)
*schford* Despotic Overlord Current Rebreather/s: Megalodon Sport Kiss Other Rebreather/s: Join Date: Jan 2005 Location: London, UK Posts: 3,558	Re: How long do Cells last in an unopened packet..... Still a dilemma :-) Teledyne Analytical Instruments \| Applications Tells us they are good for 36 months..... Now if the manufacturer reckons they are good for 36 months and have been unopened ... what should I be wary of? Actually I clicked on through and they say the shelf life is 24 months...... http://www.teledyne-ai.com/pdf/schem_b72149.pdf __________________ 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 Rebreather World is subject to the Rebreather World Terms & Conditions of Use
(Offline)

24th February 2007, 20:59	#10 (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: 1,926	Re: How long do Cells last in an unopened packet..... No dilemma Stuart. You're loaded! Buy some new ones when you need them. In the mean time, pop them in the post to me and I promise to treasure them... In all seriousness, if you do linearity checks without fail, and have another method of measuring PO2, then I don't see the problem. Swap them out when you're ready to buy some new ones. You still have my address, btw?
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