Fitbit devices use a variety of sensors to track your activity, sleep, and heart rate. Some of the most common sensors include:
- Accelerometer: This sensor measures movement and acceleration, which is used to track steps, distance, and calories burned.
- Heart Rate Sensor: This sensor uses photoplethysmography (PPG) technology to measure your heart rate by detecting changes in blood flow.
- GPS: Some Fitbit devices have built-in GPS, which allows them to track your location and pace during outdoor activities.
- Altimeter: This sensor measures changes in altitude, which is used to track floors climbed and elevation gain.
- Skin Temperature Sensor: Some Fitbit devices have a skin temperature sensor to track your body temperature, which can be helpful for monitoring sleep and health.
- SpO2 Sensor: Some Fitbit devices include an SpO2 sensor, which measures blood oxygen levels.
- Electrodermal Activity (EDA) Sensor: This sensor measures changes in skin conductance, which can be used to track stress levels.
The specific sensors used in a Fitbit device will vary depending on the model.
