Smartwatch "Heart Rate" Sensor Inaccurate
4.5
The watch shows a very high or very low heart rate that doesn't match how you feel.
Symptoms
- Erratic readings
- No reading
- Wrong heart rate
Possible Causes
- Loose fit
- Dirty sensor
- Tattoos on wrist
Step-by-Step Fix
1
Tighten the Band
The sensor must be snug against your skin to work correctly.
2
Clean the Back of the Watch
Wipe away sweat and skin oils from the green/red lights.
3
Move to Other Wrist
Tattoos or thick hair can block the optical sensor.
When to See a Technician
Optical heart rate sensors use light to "see" blood flow; anything that blocks that light will cause errors.
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