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→Oximeters
* Replacement silos (CO2 scrubbers) are $22 (less in bulk)
==Oximeters==
A pulse oximeters measures the level of oxygen saturation of the blood by shining a light through the skin, usually at the finger. Standalone pulse oximeters are available from Amazon for less than $100. Two popular oximeters are an unbranded model for $55 45 [http://www.amazon.com/Finger-Pulse-Oximeter-SM-110-Carry-Wrist/dp/B000GEBU9K B003TJH3LI Finger Pulse Oximeter SM-110] and the $100 [http://www.amazon.com/gp/product/B002CAPUWY Nonin GO2].(I purchased the SM-110 and I'm very pleased with it.)
==See Also==
* [[Altitude Training]]