What are the basic sensors offered by Smart Bands in Portugal?

25 Ağu 15:09

Basic sensors on smart bands available in Portugal (like those from Xiaomi, Huawei, Samsung, or Garmin) do cover essential features, but the offerings vary depending on the models and price ranges. In addition to the heart rate monitor and pedometer, most mid-range or premium models include **PPG (photoplethysmography)** to continuously measure heart rate, paired with an **SpO2 sensor** for blood oxygen levels, often with certified accuracy (though not always medical-grade). For advanced functions, some high-end models (like the **Garmin Venu 3** or **Apple Watch SE 2**) offer **ECG (electrocardiogram)** with medical certification, capable of detecting atrial fibrillation. Motion sensors (accelerometer + gyroscope) track sleep by distinguishing phases (light, deep, REM), while tools like **heart rate variability (HRV)** help assess stress. Skin temperature sensors (sometimes via an IR sensor) and sweat monitoring modules (on certain Garmin models) round out the features, though these remain less common. Performance involves trade-offs: PPG and SpO2 sensors use green/red light from LEDs to analyze blood flow, while ECG requires metal electrodes to record the heart’s electrical activity. Accuracy depends on calibration, sensor placement, and the manufacturer’s algorithm quality. Raw data is then processed by a mobile app (like Huawei Health or Zepp) to generate analytical reports.