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#1
May 16th, 2004
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I would like to know about oximeters; basically, I would like a way to measure my 02 and C02 levels, if possible underwater. Is that possible? What is an oximeter? How much does it cost? Does it only work on the surface?
__________________
I want to be the best I can be 
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#2
May 17th, 2004
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With an oximeter you can measure O2 levels directly but can only measure RELATIVE CO2 levels INDIRECTLY(see link below to Eric's explanations on this). You can buy them on eBay and there are quite a few for sale at the moment. Here are some threads that might interest you.
Comparing outputs http://forums.deeperblue.net/showthr...threadid=49555 Eric's Explanation on relative measurements of CO2 tolerance http://forums.deeperblue.net/showthr...threadid=42156
__________________
Andy Sydney, Australia "Birds fly, when they get tired they land. Man thinks, when he gets tired he says 'I understand'" - Japanese proverb
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#3
May 21st, 2004
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Can/do oximeters work underwater?
__________________
I want to be the best I can be
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#4
May 21st, 2004
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You can make an oximeter which works underwater, if you know how to make your own, but there are no commercially available ones (to my knowledge). I was working on one for a while, and it sort of worked, but I never got to building a housing for it.
Eric Fattah BC, Canada
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#5
May 21st, 2004
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I saw information of a pulse oximeter you could wear around your wrist with a sensor on the finger. Perhaps you could build some watertight drysuit like thing for your arm.
 www.nonin.com/Products/3100.html  Another question is if there are sensors which (perhaps with the use of an extension cable) could be used in water. For example during static near the edge of a pool. That way the pulse oximeter itself would not have to be waterproof but just the sensor and last part of the cable leading to the sensor. Has anyone got a clue? 
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#6
May 21st, 2004
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I tried using an oximeter during static, with my hand out of the pool. The blood shift was so strong that the signal on the oximeter was delayed by over a minute and never reached a realistic value. You would probably need a waterproof forehead sensor.
Eric Fattah BC, Canada
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