son_of_flubber wrote:

On the other hand, pulse oximeter ARE designed to work indoors sitting
quietly in a chair or resting in bed.


You can test this pretty easily, of course. I have 4 different models, only one of which went into error mode when moved real close to an incandescent bulb. It first must capture your HR via arterial pulse, then will read out saturation. Not as accurate as measuring arterial SaO2 via blood draw. You can find units that will send an alert if your SpO2 goes below a set %. If you want to fly with one, the finger units are too cumbersome when handling the stick, so you could consider buying an earlobe PO that isn't.

https://heymedsupply.com/clip-pulse-...0aAi5DEALw_wcB

https://erj.ersjournals.com/content/48/suppl_60/PA3702