What is the barometric pressure sensor in the Xiaomi Smart Watch?

The barometric pressure sensor, also known as the atmospheric pressure sensor or barometer, is a kind of sensor used to measure the atmospheric pressure of the environment.
For your reference, the barometric pressure sensor in the Xiaomi Smart Watch can be used for the following purposes :
1. The sensor can measure changes in atmospheric pressure, which can be used to predict weather changes such as approaching storms or changes in air pressure associated with different weather patterns;
2. By measuring changes in air pressure, the sensor can estimate changes in altitude. This can be useful for outdoor activities such as hiking or climbing, as well as for tracking floors climbed during indoor activities;
3. Changes in atmospheric pressure can sometimes be associated with changes in cardiovascular health. Your watch can use this data, along with other health metrics, to provide insights into the wearer's health and fitness levels.