Blood oxygen
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@Eddy-De-Backer unfortunately, i tried to soft reset but it did not work for me.
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@S.Pichi the same for me
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@Eddy-De-Backer Same issue no manual measures , soft reset didn’t help.
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My Suunto Race 2 stopped measuring blood oxygen after updating to version 2.48.16. Manual measurements don’t work at all, and the nighttime readings are inaccurate. A soft reset didn’t help.
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My watch too

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@Dimitrios-Kanellopoulos when i try manually have consistently below 90% saturation with firmware 2.48.16 on 9Peak Pro, but nightly measurement are ok (98-100%)
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It worked for me well but last two nights bloodoxygen recorded around 85% and i am not able to measure manually. Restart didn’t helped too.
Prior this i had one night watch on night table instead of hand. Not sure if related to it.
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If Suunto dive computers are as accurate as the Race 2, then good night.
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@Tomas5 Hey, I’m going to try to describe how the oxygen measurement (which works very reliably on all Suunto watches, by the way) works. The most important thing to note is that any light shining on the sensor negatively affects the measurement. To ensure reliable readings during the day, I take the watch off and hold it on my wrist where it usually sits. I don’t fasten the strap, though. I hold the watch between two fingers, then gently press it against my skin and start the measurement without moving my hands. This gives you perfect control and shows you that no light is reaching the sensor. Just try it out. The important thing is not to press the watch down hard, just gently.
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@GiPFELKiND Also ich trage meine ganz normal wie eine Uhr. Und sollte ich mal messen dann funktioniert es perfekt. Aber in Wirklichkeit ist es halt eine schöne Funktion die kein Mensch braucht. Aber schön wenn man sie hat.
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Whats going on in this Forum. Wants to help and got 2 dislikes! Whats wrong with you 🤮
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@GiPFELKiND Ich meine nur dass die Messung auch beim normalen Tragen supi funktioniert.
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@Cyclepunk good night to you too…
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@GiPFELKiND short answer: sounds good, doesn’t work
long answer: i already tried multiple ways including what you describe, i tried measuring during evening when it was already dark outside and no light at room. It doesn’t work at all. Until recent few days. It worked just normal 99% time and manual measurements was successfull and night measurement measured around 96-98% every night, no problem at all. Only just few nights ago it started to measure values below 90% at night and manual measurements doesn’t work 100% of times. I really don’t believe that sudenly from day to day i somehow lost ability to do manual measurement from 99% successful to 100% unsuccessful. Now it behaves exactly like with earlier version of firmware where i had this anoying bug. -
@GiPFELKiND not sure who or why give you dislike, but maybe people with this bug are just anoyed when someone blames it to be user error. When this is obviouse bug/issue in firmware or hardware.