
The Fitbit Sense also meets the increasing demand for an electrocardiogram (ECG) sensor, which analyzes your heart rhythm for signs of atrial fibrillation (AFib). Speaking of sensors, it also comes with a skin temperature sensor that can detect changes that could indicate a fever, illness, or new menstrual phase. This will help you understand how your body reacts to stress. It will then detect small electrical changes in your skin's sweat level. You'll access this feature by placing your palm over the face of the watch. It contains the first electrodermal activity (EDA) sensor on a smartwatch, which measures electrodermal activity responses.

The most important aspects of the new Fitbit Sense aren't related to the appearance at all. GPS, 3-axis accelerometer, 3-axis gyroscope, altimeter, ambient light sensor.

GPS + GLONASS, ECG, EDA, skin temperature, optical heart rate sensor, gyroscope, 3-axis accelerometer, altimeter, ambient light sensor
