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Thread: Understanding Oxygen Sensors by Paul Raymaekers

  1. #21
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    Re: Understanding Oxygen Sensors by Paul Raymaekers

    Quote Originally Posted by Mike_Eitel  View Original Post
    Congratulations Paul

    I only want to add something i learnde from an old developer from AII labs.

    The sensors hate to get revers currents. Means they get easily damaged when your electronics "reinjects" current into the sensor. ( even low or short spikes ).

    After I learned that , I modified my electronics .... Less defecive sensors, lasting longer.

    Mike
    correct, oxygen sensors absolutely don't like to be 'charged'

    but normally, this does not happen with correct electronics
    www.rEvo-rebreathers.com
    ...."Yes you have to pre-breathe to activate the scrubber sorb, anyone who says different doesn't know what they are talking about!"...
    .... to get more accurate CO2 injection in the breathing machine we put 2 mass flow controllers in series ...
    .... The noise is a few tens of nano-volts, so DL were able to reduce the output voltage ...
    .... radial scrubbers give longer dwell time than axials...
    .... the earth is flat and ...

  2. #22
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    Re: Understanding Oxygen Sensors by Paul Raymaekers

    Quote Originally Posted by Packhorse  View Original Post
    Or build a small pressure pot, put your cells in it and fill will O2 to a pressure of2 bar absolute.

    http://www.rebreatherworld.com/showthread.php?t=29787

    cool

  3. #23
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    Re: Understanding Oxygen Sensors by Paul Raymaekers

    Quote Originally Posted by paulraymaekers  View Original Post
    real divers do this test when they dive as it says in the article: on a regular basis you check your sensors for current limiting

    as for perfect prediction: in the ideal world maybe yes, in the real world, as in the article, there are more failure types then only current limiting..
    Thank you for responding.

    Again, nice article. I think I am going to use it to add O2 cell failure and O2 cell testing to the sim

    Alberto (aka eDiver)

  4. #24
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    Re: Understanding Oxygen Sensors by Paul Raymaekers

    Hi Paul,

    Nice work.

    Over the years you've mentioned going from Aii to Teledyne, and probably some brands we're not familiar with. Is there a difference in reliability between the brands?

    Tony

  5. #25
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    Re: Understanding Oxygen Sensors by Paul Raymaekers

    hi paul,

    green added thanks for taking the time to write the article, it would be nice if either you or curt could save it as a PDF to use in class for students as a handout.

  6. #26
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    Re: Understanding Oxygen Sensors by Paul Raymaekers

    Quote Originally Posted by tecdivertraining  View Original Post
    hi paul,

    green added thanks for taking the time to write the article, it would be nice if either you or curt could save it as a PDF to use in class for students as a handout.
    on the rEvo website, english pages, downloads: pdf is there
    www.rEvo-rebreathers.com
    ...."Yes you have to pre-breathe to activate the scrubber sorb, anyone who says different doesn't know what they are talking about!"...
    .... to get more accurate CO2 injection in the breathing machine we put 2 mass flow controllers in series ...
    .... The noise is a few tens of nano-volts, so DL were able to reduce the output voltage ...
    .... radial scrubbers give longer dwell time than axials...
    .... the earth is flat and ...

  7. #27
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    Smile Re: Understanding Oxygen Sensors by Paul Raymaekers

    Quote Originally Posted by paulraymaekers  View Original Post
    on the rEvo website, english pages, downloads: pdf is there
    cheers paul

  8. #28
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    Re: Understanding Oxygen Sensors by Paul Raymaekers

    Good article, written in easy language & accessible for the beginners, thanks for that.
    Just what my OS diving friends need for a "quick reference" on how things are running. :)
    Do you have references on literature used ?

  9. #29
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    Re: Understanding Oxygen Sensors by Paul Raymaekers

    Quote Originally Posted by Faceless  View Original Post
    Good article, written in easy language & accessible for the beginners, thanks for that.
    Just what my OS diving friends need for a "quick reference" on how things are running. :)
    Do you have references on literature used ?
    it's not a copy/paste internet article it's all own research!

    the only extra info we used, were the recommendation leaflets of the sensor manufacturers

    paul
    www.rEvo-rebreathers.com
    ...."Yes you have to pre-breathe to activate the scrubber sorb, anyone who says different doesn't know what they are talking about!"...
    .... to get more accurate CO2 injection in the breathing machine we put 2 mass flow controllers in series ...
    .... The noise is a few tens of nano-volts, so DL were able to reduce the output voltage ...
    .... radial scrubbers give longer dwell time than axials...
    .... the earth is flat and ...

  10. #30
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    Re: Understanding Oxygen Sensors by Paul Raymaekers

    Quote Originally Posted by paulraymaekers  View Original Post
    it's not a copy/paste internet article it's all own research!

    the only extra info we used, were the recommendation leaflets of the sensor manufacturers

    paul
    Well, I've seen some graphs & phrases resented in the article in another research document I've used 2 years ago for my project. Anyway, given the current circumstances for beginners it's better than nothing. :)
    Last edited by Curt Bowen; 19th December 2010 at 12:36.

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