Wit Motion (Shenzhen) WT901 is its classic 9-axis attitude module combining a 3-axis accelerometer, 3-axis gyro and 3-axis magnetometer, using MEMS sensing with proprietary Kalman-filter sensor fusion to output angles, rates, acceleration, magnetic field and quaternions at up to 200 Hz. Accelerometer ±16 g range with 0.0005 g/LSB resolution and 0.75~1 mg RMS noise at 100 Hz bandwidth; gyro ±2000 °/s with 2.24 °/h bias instability (Allan variance) and 3.19 °/h zero-bias stability; 0.2° tilt accuracy and 0.1° heading accuracy without magnetic interference; default UART 115200 bps, -40 to +85 °C operation. Compact and affordable, it is widely used for attitude estimation and motion control in humanoid robots, robot dogs, drones and research.
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