All About Rebreather OXYGEN SENSORS | Scuba 101
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- Опубликовано: 27 окт 2023
- In this episode of Scuba 101, Jonathan talks about the basics of oxygen sensors as used in rebreathers.
Please note, THIS IS FOR ENTERTAINMENT PURPOSES ONLY! This video is not intended to be instructional and Jonathan is not an instructor.
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Развлечения
I watched almost all of your educational videos here, but now is the time when I realized that you are an excellent teacher too! We love you, Jonathan!
Thanks!
Hello Jonathan, okay I understand you’re not an Instructor but you’re a perfect Communicator and it’s a great pleasure to follow your explanation of how things work. I also like the submarine decoration on your Set. I have been a recreational diver for some years and I am very interested how dive technology evolves. Thank you for your great work. Greetings from Vienna/ Austria
I appreciate that! Thanks!
Always wondered, how those little babies work. Thank you!❤
Science of O2 sensors, way cool and thanks for the presntation
This is a video every diver should watch!! Very good !!
Thanks!
Excellent presentation on Oxygen sensors. It cleared up several questions I had on those little guys. Keep those videos coming. 🙂
Thanks, will do!
Next Scuba 101 will be about trimix
A very good episode and excellent explanation! Thank you.
Glad you enjoyed it!
As a diver about to do a test dive on a rebreather for the first time ever I like knowing there’s multiple sensors keeping me alive welp here I go down an expensive road 😂❤️
Its simply awesome what you do, so thank you very much for your efforts !!
Fenomenal educational content there, but I would disagree with the title, it's not "all" about CCR oxygen sensors - only galvanic ones. 😉
There is a lot of promise in the solid state O2 sensors, but they are far from mainstream yet, not to mention they are over $1K each.
very well explained. thanx so much
Jonathan we appreciate your expert skill in conveying technical concepts in a fun and enjoyable format. Keep on doing what you do as each of your talks are engaging and founded on scientific principals. 🤙Cheers, #SeattleRingHunter
Great video. Thanks
Great episode! Thank you!
Glad you enjoyed it!
Please explain the different types of connectors for each sensor. Ex: Molex, SMB, Coax....
Great video thanks, makes sense to test the sensors to see if they are current limited but we are told to splash in with a low set point say 0.7 typically, whereas this test suggests we jump in at 1.0. Believe there is some ambiguity here from the agencies? Thoughts?
I'm not an instructor. LOL. I'm just saying how I do it.
Great! Now do one on Solid State sensors!
I don't know that much about them, but from what I have heard, they are going to be the better way to go once the price comes down a little.
Top video squire
Any chance you have any knowledge on the solid state cells use on the Poseidon MKVII unit?
Here is a good article about them:
gue.com/blog/what-ever-happened-to-solid-state-sensors/
Well, that's one way to get them through TSA....
video STREPITOSO !!!!!🙂
Can you comment on gifting used sensors to your open circuit buddies to use in their nitrox analyser?
As a general rule, if a sensor is weak enough that you can't use it in a rebreather, you shouldn't use it for an analyzer.
Hey there!
When does the video about solid state oxygen sensors come out? 😇
gue.com/blog/what-ever-happened-to-solid-state-sensors/
What happens if the sensors are immersed? Shorts?
If they get wet, they do not work. That is one of the challenges of rebreather design--making sure that the O2 sensors stay dry.
At PO2=0 voltage is always 0, right? At this point (0, 0) all lines should cross.
Correct, the device can't function without oxygen.
Funny thing to say as rebreathers have been around since ww2 without oxygen sensors.
Earlier than that actually.
why dont you do three or four different gas mixes and use those points to calibrate? Then you automatically can check weather your sensor ist too old. I mean if you get your oxigen from a blending station you can get a bit of nitrox with xy O2 as well. With modern computers you should be able to calibrate for several O2 levels at 1 atmoosphere. Am I wrong?
Computers are set to calibrate at pure O2 only.
@@BlueWorldplus thinking about it, it seems reasonable. Otherwise there would be an additional possible failure point if one doesn't exactly know the oxygen in the gas mix. I.e. if its 32,3 instead of 34%.
So much easier diving open circuit...and you don't die.
People still manage to die.
@@BlueWorldplus Almost every diver death I read about is someone using a rebreather that malfunctioned or was incorrectly assembled; equipment is rarely the cause of open circuit scuba fatalities.
Great explanation.
But still:
Nowadays there are highly reliable solid state oxygen sensors that have virtually unlimited lifetime - rated for ten years even in safety critical gas monitoring devices.
I cannot understand why rebreather manufacturers don't use them. These electrochemical sensors are clearly less safe and much more expensive due to frequent changes.
The problem is that solid state oxygen sensors requiers change in construction of the head of rebreather, also as for now poseidon is testing this but this is propioritary technology of this manufacturer so other producents would have basicly to buy this technology from them or invest a lot of money in developing similar system of their own
There is no question that the solid state ones are the future. I don't know much about them, but how do they handle extremely humid environments?
@@BlueWorldplus GUE published an article about the subject on their blog back in 2021, you can find it by googling "What Happened to Solid State Oxygen Sensors?". The essence was, that it is possible but still requires a lot of research and development to make them work reliably and accurate in the environmental conditions inside a rebreather.
That's how I came to the conclusion that we still don't see solid state sensors in most rebreathers because manufacturers don't like to spend money on research and development.
The main issue is that those sensors requier external power to run (not like galvanic sensors that are basicly batteries) so you have to change build of whole electronics in head, as far as the problems with those sensors - I havent`t found any informations about problems only that they work great for long period of time (some were tested for much longer than 5 years without any problems) The second may be the cost of investment in those sensors (they are quite pricy but this is neglegble comparing to switching normal sensors for couple of years)
@@robit024 I would have expected they'd digitize sensor readouts in the head electronics in order to transfer them via CAN bus or some similarly reliable digital protocol to the controllers. Your description implies that they run the analog sensor voltage through the cable and even a plugged connection and then do the AD conversion in the controllers.
Is that really true? Doesn't sound like a smart idea to me...