Rebreather World - View Single Post - An O2 sensor pressure pot finally available

cedricverdier · 21st November 2006, 03:14

Hi all,

Thanks to this forum, almost all the rebreather divers are aware of the current-limited O2 sensors and how it could affect the pO2 reading.
Unfortunately some accidents in a recent past, show that it's definitely an issue, even with new sensors. Just changing sensors every 18 months is not enough and a friend of mine had some faulty cells fresh from their package.

People have been discussing since a while about how to test the sensors at an O2 pressure higher then 1.0 at the surface (preferably higher than 1.6). Most of the rebreather divers don't have access to a pressure pot (quite expensive). And even if they have, they don't pressure test their sensors on a regular basis.

I was glad to see at DEMA that Ron Micjian, one of the Rebreather World most active members, came up with a very nice portable (and affordable!) pressure pot to test 3 sensors at the same time. Sounds to me like a must!

It's small and light, and extremely easy to use. You connect it to an analyzer, increase the pressure. Voila! The analyzer is used as a display for the sensors.

Depending on how often you dive with your rebreather, testing the sensors should be part of a monthly routine. Sensors decay over time and their inability to read high pO2 should be the main reason to discard them. Age doesn't mean a lot.

Good job, Ron. Wearing a tuxedo at the Rebreather World party was already impressive. But designing this pressure pot is even better.

Keep on having some good ideas like that. It definitely improves safety for the rebreather divers. You'll maybe get a Rebreather World Award for that next year!

Cheers

21st November 2006, 03:14	#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: 497	An O2 sensor pressure pot finally available Hi all, Thanks to this forum, almost all the rebreather divers are aware of the current-limited O2 sensors and how it could affect the pO2 reading. Unfortunately some accidents in a recent past, show that it's definitely an issue, even with new sensors. Just changing sensors every 18 months is not enough and a friend of mine had some faulty cells fresh from their package. People have been discussing since a while about how to test the sensors at an O2 pressure higher then 1.0 at the surface (preferably higher than 1.6). Most of the rebreather divers don't have access to a pressure pot (quite expensive). And even if they have, they don't pressure test their sensors on a regular basis. I was glad to see at DEMA that Ron Micjian, one of the Rebreather World most active members, came up with a very nice portable (and affordable!) pressure pot to test 3 sensors at the same time. Sounds to me like a must! It's small and light, and extremely easy to use. You connect it to an analyzer, increase the pressure. Voila! The analyzer is used as a display for the sensors. Depending on how often you dive with your rebreather, testing the sensors should be part of a monthly routine. Sensors decay over time and their inability to read high pO2 should be the main reason to discard them. Age doesn't mean a lot. Good job, Ron. Wearing a tuxedo at the Rebreather World party was already impressive. But designing this pressure pot is even better. Keep on having some good ideas like that. It definitely improves safety for the rebreather divers. You'll maybe get a Rebreather World Award for that next year! 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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