OP
Bad air originating in tank and not compressor
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Mr. Black
Contributor
No. Big difference. The CO monitors I referred to will detect CO, not CO2. CO will be present if there has been a problem during filling the tank and the effects can be fatal with little warning before it is too late.
As to options, keep your eyes open. IIRC, DiveNav may be introducing a CO monitor to its line this fall. They currently make a EANx monitor (NitroxBuddy) that uses a smart phone for the display, resulting in a fairly compact device. IF they go through with the rumored CO device, it would be a real easy to travel with package. The NB for EANx is about the size of a DIN to Yoke adapter.
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videofly
Registered
Thanks, I misread CO to say CO2. Anyway, thanks for straightening me out and identifying an important safety concern. From what I have been reading, I will be researching options and purchasing a CO analyzer. This seems to be an extremely important issue with a relatively simple solution.
dreamdive
Contributor
I read this thread with great interest! One thing I did not see and may have missed is:
Was this a Nitrox filled tank? and if so, Does the shop use partial pressure blending?
Why does that matter? Because as the cylinder gets filled with oxygen and you have an unrecognized flash during the O2 fill that later gets topped off with Air, you can get very significant CO contamination! Further, your in-line CO monitors will not detect it!
This is very important for all those who fill their own tanks by partial pressure blending method. I just learned of one such incident yesterday! Obviously a flash burn can occur during a O2 only fill and has very serious implications for us rebreather and tech divers!
I am also very disappointed to learn that Analox is discontinuing their CO monitor. I was going to order that one to check my O2 and nitrox blends prior to each use.
Was this a Nitrox filled tank? and if so, Does the shop use partial pressure blending?
Why does that matter? Because as the cylinder gets filled with oxygen and you have an unrecognized flash during the O2 fill that later gets topped off with Air, you can get very significant CO contamination! Further, your in-line CO monitors will not detect it!
This is very important for all those who fill their own tanks by partial pressure blending method. I just learned of one such incident yesterday! Obviously a flash burn can occur during a O2 only fill and has very serious implications for us rebreather and tech divers!
I am also very disappointed to learn that Analox is discontinuing their CO monitor. I was going to order that one to check my O2 and nitrox blends prior to each use.
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They are not discontinuing their O2 analyzer. :silly:
OP
No and No. At this point they have no nitrox capability but are looking into a mixing stck.
---------- Post added August 24th, 2014 at 04:47 PM ----------
I think dreamdive was looking for a CO tester.
Johnoly
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It's generally recognized that 50 - 70psi / min transfer rates of O2 are safe. To fill an empty tank to achieve 36% at 3200psi, you'll need roughly 600psi of O2. That transfer rate could take 10 minutes and then it still needs to be topped off with air.
If your fill station is using partial pressure fill, stand around and watch how fast they fill your tanks with both gases.
(P.S. to add) - O2 is an oxidizer and can't burn by itself. A fuel source is still needed to burn and thus create CO.
Nothing you said in your post was incorrect, this was just for further clarification.
dreamdive
Contributor
Dandy Don: Please re-read my post: I am also very disappointed to learn that Analox is discontinuing their CO monitor
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