what is the gyro sensor used for
See More Features. The digital EV3 Gyro Sensor measures the robotâs rotational motion and changes in its orientation. Students can measure angles, create balancing robots and explore the technology that powers a variety of real-world tools like SegwayÂ®, navigation systems and game controllers. 1  Angle mode measures angles with an accuracy of +/- 3 degrees. 2  Gyro mode has a maximum output of 440 degrees/second. 3  Sample rate of 1 kHz.