This datafield displays % concentration of oxygen in air at your present elevation using the ambient air pressure sensor measurement. For watches without an ambient air pressure sensor, GPS altitude is used.</p><p></p><p># Features</p><p>* Setting option to display as a % of nominal oxygen concentration at sea level (displayed as Rel. O2) At sea level under nominal conditions it would read 100%.</p>
Version 1.1.0</p><p>For watches without an ambient air pressure sensor, GPS altitude is used for the calculation. This is slightly less accurate because barometric pressure may be higher or lower than nominal.
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