Blood oxygen saturation values completely wrong and inaccurate.
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Hello everyone !!
I took some measurements with my nuvo race of the blood oxygen saturation value…
All readings report absurd and inaccurate values!!
Values like 70-80…I wouldn’t be here writing!!
Comparison tests were carried out with a certified oximeter, Apple Watch 6 and Amazfit Trex 2…which all give me real and exact values!!
I wear the race on my left wrist where I always put my other smartwatches too…
Defective sensor? Can a calibration be done?
A thousand thanks
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@Max90PayneFPV SpO2 has never worked for me either. Not with my S9P and not with the SV.
That is, if it even measures. Most of the times I get a warning it could not measure it.The only time I get values is if I press my finger on the sensor
Even then the values aren’t consistent. -
at first i have got the same problem with my suunto race.
then i wore my watch a bit away from the wrist joint, more towards the forearm (there is more flesh) there i get good readings for spO2. around the wrist it is too bony. hope that helps. -
@Max90PayneFPV Hey Bro
if you wear your watch everytime like this i think it is okay that you get false values. You have to put the sensor 2 fingers away from your wrist. Try it like in my Picture and hold your watch only with 2 fingers in Position.!2 fingers away from your wrist Look at the first picture
Try it without fixing the Wristband and hold it in place – Look at the 2 Picture, press the watch soft on your skin. To much pressure also make false values.
Then i get right values … Perhaps this Help you
! Show the last Picture
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@GiPFELKiND moving the watch 2 fingers up and warming up the skin does help getting readings.
I tried 3 times in a row without moving the watch or changing the pressure. The results were 73, 98 and 86. Not really the reliability I was hoping for… -
@surfboomerang It is best to place your hand on a table or other stable surface and do not make even the slightest movements.
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@surfboomerang
I think that the sensor used on SV and SR is bad and no firmware can mitigate its inaccuracy.
This proved to be the case with my SV which at the end I returned and I once again discovered that AW Ultra 2 e Epix Pro 2 have way better sensor than Suunto. It’s an unfortunate choice by Suunto which undermines the whole product which, apart from this, is a very good watch• If a sensor is faulty, all the measurements and health data are then unreliable.
I’m giving a last try to a Suunto Race arriving today and I will compare it with the Polar Vantage V3. The Polar still shows some inaccuracy. However, Polar uses a highly advanced sensor hardware - very different from Suunto crap sensor - which will be for sure improved with the next FWs. -
@Dante-Mclalla said in Blood oxygen saturation values completely wrong and inaccurate.:
I think that the sensor used on SV and SR is bad
On what is this statement based? The fact that some users have uneven readings does not necessarily imply that the sensor is “bad.” I also happen to have erroneous readings, but for example on my wife’s wrist the readings are always correct (obviously compared to a oxymeter).
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@Dante-Mclalla It works fine for me
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@robis Is based on my experience and looking at the results coming from Garmin Epix pro 2 and my Whoop.
Starting from today I will compare SR with Coros Pace 3 and Whoop and Polar Vantage V3 and let’s see how and if Suunto faces its competitors. Honestly, I have no great expectations…By the way, from DCRainmaker “Now, remember I mentioned earlier in the review I only had two complaint areas? And that the first was slowness? Well, here’s the second – optical heart rate sensor accuracy. It’s bad. There’s no two ways to slice it.”
https://www.dcrainmaker.com/2023/11/suunto-race-amoled-in-depth-review.html -
@Dante-Mclalla for me both Vertical and Race match a chest strap in a large variety of workouts for 99% of the time.
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this is about SpO2 measurement accuracy.
I do get consistently 97-99% readings if I trigger it during the day (watch worn as suggested, hand lying on table without movement).
If I enable the measurement during the night (which I usually don’t do as I live in Hamburg), I get 100% nightly maximums.Seems to be good enough for me - while I have absolutely no use for this feature.
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@Dante-Mclalla lets find out in the next days. I’d hope to get good results as I love Suunto watches.
Suunto (as well as Polar and Casio) should learn from Coros in terms of continuous release of FW update fixing issues and introducing new functions on both the latest and oldest releases. In few years, Coros took the lead in ultra marathon races and is second only to Garmin (5-7 years ago Suunto was a clear second behind Garmin). This means something… -
@isazi BO saturation depends on the sensor, if the sensor is inaccurate the same will be for BOxygen
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@Dante-Mclalla said in Blood oxygen saturation values completely wrong and inaccurate.:
@isazi BO saturation depends on the sensor, if the sensor is inaccurate the same will be for BOxygen
Practice shows that this is not the case.
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@Dante-Mclalla it depends on the sensor and the application of the sensor.
The result cannot be better than each factor. -
@maszop Hope I’m wrong! I’ll see by myself in the next days: Suunto Race vs Coros P3 vs Whoop Vs Polar V3. I’ll keep the whoop and the most accurate watch
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@Dante-Mclalla this makes sense, if it works best for you.
Out of curiosity: What is your use case for a most accurate SPO2 measurement? -
@Dante-Mclalla Watches, especially Suunto, have problems measuring heart rate during more intense activity. When at rest (blood oxygen measurement), it’s not that difficult, as long as the watch is fastened correctly, there are no tattoos, etc.
