I started to find out how accurately the optical pulse sensors in the watch measure. First, I just wanted to verify how the Elevate 5 sensor in the latest Garmin models has improved over the previous version. But then I started adding other watches that I came across.
The result was this article with a summary of findings and the results of the first tests.
But I didn’t stop with it. At the time of this writing, I have completed approximately 140 hours of testing – comparing the heart rate from the optical sensors of various watches against a reference measurement using a chest strap. I improved the methodology, automated calculations and visualizations. And I will probably continue with it.
That is why I prepared this article, intended for the presentation of the results. When I measure a new watch or perform another test, I will add new data to the article. You can currently find results for the following models:
- Apple Watch 4
- Apple Watch 9
- Apple Watch Ultra 2
- Garmin Epix Pro
- Garmin Forerunner 965
- Garmin Venu 2 Plus
- Garmin Venu 3
- Huawei Watch GT 4
- Samsung Galaxy Watch 5
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Comparing watches according to the accuracy of their heart rate sensors.
Detailed graphs and highlights for each model tested.
Comparison of old and new versions of Apple and Garmin watch sensors.
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