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Pulse oximeter accuracy

How accurate is the pulse sleep oximeter? my stats are coming in around the mid 80's!!

  • I have just bought a Garmin fenix 6 and with the latest  update it meaures for me between 95% and 98% which seems about right. Obviously because only a few percentage points is the difference between health and illness they have to be accurate to be of any use.

  • my wife's 245 , non music, does not have accurate readings too. the watch counting 88-92% and the from the finger she gets 97-99%. 

    it is a big difference !!! 

  • I checked mine against a medical oximeter and got 7 points difference on average over about 4 hours. Not very scientific, but it aligns with your finding. 

  • I've some questions related the accuracy:
    It's possible that the Pulse Oximeter accuracy depends on the firmware versios of the forerunner 245 or depends on quality of sensor? The accuracy problem is the same in other multisport watchs type? The firmware update 6.2 resolve the problem? My measured value is 90. Sometimes 97. Thank you

  • the same happens with 245 music. The precision is not good. I got 85% during sleep and 91% day average.   

  • FR245 - Inaccurate, reads 89% against my finger oximeter of 97%. If I relied on the FR readings, I should be heading to the hospital.