Wit Motion WT901 9-Axis IMU Attitude Sensor Module
Vendor: Wit Motion ( )
Product: WT901 IMU
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.
| Axes | 9 (3-axis accel + gyro + magnetometer) |
| Interfaces | UART (default 115200 bps), I2C |
| Output Rate | 0.2~200 Hz |
| Tilt Accuracy | 0.2° |
| Operating Temp | -40 to +85 °C |
| Accel Rms Noise | 0.75~1 mg (100 Hz BW) |
| Gyro Full Range | ±2000 °/s |
| Accel Full Range | ±16 g |
| Accel Resolution | 0.0005 g/LSB |
| Heading Accuracy | 0.1° (9-axis, no mag interference) |
| Gyro Bias Instability | 2.24 °/h (Allan variance) |
| Gyro Zero Bias Stability | 3.19 °/h (10-s smoothing, 1σ) |