How is heart rate measured on this smart watch?Updated 6 hours ago

Relevant models: Active Pro & Motion Pro.

Sekonda smart watches use photoplethysmography (PPG) to monitor your heart rate. This technology works by shining a green LED light onto your skin and measuring the light reflected back from your blood vessels.

How it works:

• As your heart beats, blood flow changes beneath the skin.

• The green light is absorbed by the blood, and sensors on the watch detect variations in light reflection.

• These fluctuations are used to calculate your beats per minute (BPM) in real time.

To ensure accurate readings:

• Wear your watch snugly and two finger-widths above the wrist bone. 

• Avoid wearing it too tight or too loose, and ensure the sensor on the back stays in direct contact with your skin.

• During measurement, try to remain still. Excessive motion or loose wearing can interfere with results.

Tip: For even more reliable readings—especially during workouts—tighten the strap slightly and avoid placing the watch directly on bony areas of the wrist.

Factors that may affect accuracy:

• Dark tattoos, body hair, or skin tone may reduce the sensor’s ability to capture light accurately.

• Excess sweat, movement, or environmental conditions can impact results.

• If you notice consistently unusual readings, try cleaning the sensor and adjusting the fit.

If you’ve completed these steps and are still not receiving alerts, try restarting both your watch and phone, then reconnect the device via the app. Still having issues? Contact us by clicking here.

(Relevant SKUs: 30238, 30239, 30240, 30241).