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  1. #1
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    Default Has anyone replaced the O2 senors in a CooTwo analyzer?

    My Cootwo seems unstable on O2 calibration. It may be time to replace the O2 sensor. Mine is from the first batch, so the sensor is getting pretty old.

    Is the sensor something I can get from someplace like DiveGear Express? I looked on the CooTwo website, and don't see a way to order just the sensor.

    Forrest Wilson (with 2 Rs)
    Any opinions are personal.
    Sump Divers

  2. #2

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    You have to navigate their site a bit...

    http://www.ediving.us/forum/viewtopic.php?f=193&t=3120

    https://www.divenavstore.com/product/781

    As for replacing the CO sensor... their page from 2015 says "coming soon". I would really like to have a CO analyzer but everything I read about them makes them seem expensive and difficult to support long term. Am I wrong?


  3. #3
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    I haven't had any problems until now. They are small, and convenient, because they combine O2, and CO in the same unit. I don't think you have to replace the CO sensor nearly as often as the O2 sensor. From the website, the O2 sensor is cheaper than the same one from DGE. FWIW, as a "kickstarter" participant, I am due s 20% discount on the first replacement sensor

    Forrest Wilson (with 2 Rs)
    Any opinions are personal.
    Sump Divers

  4. #4
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    Default

    While we're at it, is anyone making a CO sensor for the red and gray Analox CO detector? Mine still seems to be working but for how long?

    Whoever said money can't buy love never bought a puppy.

  5. #5
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    Default

    I just replaced my O2 sensor in my Cootwo unit. The only problem now is the CO sensor needs to be calibrated (not replaced), but that requires ordering the calibartion gas. For now, the unit is just a lightweight brick.

    DiveNav does offer a calibration service for $50 +$10 shipping

    This is the link to order just the O2 sensor:
    https://www.divenavstore.com/product/781

    It is $10 cheaper than everywhere else I've looked for it.

    Last edited by sdenney; 12-13-2017 at 10:28 AM. Reason: CO calibration service

  6. #6
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    Quote Originally Posted by sdenney View Post
    I just replaced my O2 sensor in my Cootwo unit. The only problem now is the CO sensor needs to be calibrated (not replaced), but that requires ordering the calibartion gas. For now, the unit is just a lightweight brick.

    DiveNav does offer a calibration service for $50 +$10 shipping

    This is the link to order just the O2 sensor:
    https://www.divenavstore.com/product/781

    It is $10 cheaper than everywhere else I've looked for it.
    Does it stop working when the CO needs calibration? If not, don't worry about it. If it shows any CO, don't dive. You can test it by exhaling into it. It ususaly shows 1-3 ppm, depending on if you smoke.

    Forrest Wilson (with 2 Rs)
    Any opinions are personal.
    Sump Divers

  7. #7
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    Quote Originally Posted by chrpai View Post
    You have to navigate their site a bit...

    http://www.ediving.us/forum/viewtopic.php?f=193&t=3120

    https://www.divenavstore.com/product/781

    As for replacing the CO sensor... their page from 2015 says "coming soon". I would really like to have a CO analyzer but everything I read about them makes them seem expensive and difficult to support long term. Am I wrong?
    Buy an oxycheq. And yes you're wrong. In my opinion having a co monitor is a necessity regardless of long term maintenance costs. You've spent much more on much less important equipment. Only exception in my opinion is if you can use a shop's on every fill.
    Dont think of it as needed for your safety. Think of it as safety for your buddy or the recovery divers who wont have to drag you out of a cave convulsing if you tox.


    Sent from my iPhone using Tapatalk


  8. #8
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    Quote Originally Posted by FW View Post
    Does it stop working when the CO needs calibration? If not, don't worry about it. If it shows any CO, don't dive. You can test it by exhaling into it. It ususaly shows 1-3 ppm, depending on if you smoke.
    Yes. Apparently the older ones will not function as a straight O2 analyzer. Newer units have that option.


  9. #9
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    I just looked for calibration gas online. Grainger has a 2L bottle for only $32.30. That is less than sending it to DiveNav, and will last one diver forever.

    Forrest Wilson (with 2 Rs)
    Any opinions are personal.
    Sump Divers

  10. #10
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    Quote Originally Posted by FW View Post
    I just looked for calibration gas online. Grainger has a 2L bottle for only $32.30. That is less than sending it to DiveNav, and will last one diver forever.
    Make sure it is 20ppm CO



 

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