An acceleration sensor is a device that measures proper acceleration, which is the acceleration it experiences relative to freefall. It typically measures the magnitude and direction of the acceleration as a vector quantity. Modern acceleration sensors are electronic devices that generally measure forces much less than 1 g or up to several hundreds of gs. They are widely used in safet... https://medium.com/@colinwilson306/accelerometer-understanding-how-acceleration-sensors-work-and-their-wide-applications-3b05533ccf62