Tech article
The Quantified Scientist tests the Apple Watch Series 12’s new heart rate sensor - 9to5Mac
Publisher description: In a new video, The Quantified Scientist’s Rob ter Horst compares the new Apple Watch Series 12’s heart rate sensor against a Polar H10 ECG chest strap.
NewsAPI | Sep 18, 2026 | Marcus Mendes
Automated excerpt
For the Apple Watch Series 12, Apple completely revamped the device’s heart sensor, which now measures heart rate every five seconds even when the user isn’t active. Finally, ter Horst also tested the Apple Watch Series 12’s step counter. Did you buy the new Apple Watch Series 12?
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