WitMotion WT901B AHRS (MPU9250) 10-Axis IMU with Barometer & Tilt Sensor, 16g accelerometer, 2000/s Gyro, Kalman Filter, UART/IC, 0.2200 Hz Output

Overview

The WitMotion WT901B AHRS (MPU9250) integrates a 3-axis accelerometer, 3-axis gyroscope, 3-axis magnetometer, and a barometer to deliver angle, acceleration, angular velocity, magnetic field, air pressure and height. A 48 MHz MCU with LDO regulation and an in-house fusion + Kalman filter algorithm provides low-noise, stable outputs for robotics, structural monitoring, mobile machinery, and VR/consumer devices.

Key Features

• 10-axis IMU + barometer with altitude calculation (relative accuracy 0.06 hPa)

• Angle precision: X/Y 0.05 (static), 0.1 (dynamic); Yaw 1 (calibrated, low interference)

• Configurable output 0.2200 Hz; start-up 1000 ms

• Interfaces: UART (4800230400 bps), IC (open-drain; needs 4.7 k pull-ups)

• Supply 3.35.5 V, typical 12 mA @5 V, sleep 15 A

• Rugged: 4085 C operating, 20,000 g shock resistance

• Free Windows software (real-time curves, logging to TXT), visual magnetic calibration, 3D demo (source available on request)

• Certifications: Calibration report, RoHS, CE, ISO9001

Roll/Pitch Angle Specifications

Parameter	Condition	Typical
Range		X: 180, Y: 90
Inclination	Static / Dynamic	0.1 / 0.5
Resolution	Horizontal	0.0055
Temp Drift	4085 C	0.51

Heading (Yaw) Specifications

Item	Condition	Typical
Range		Z: 180
Resolution	Horizontal	0.0055
Accuracy	9-axis (dynamic/static)	1 (calibrated, away from interference)
	6-axis (static)	0.5 integral cumulative error

Sensor Technical Specs

Accelerometer

Range	Resolution	RMS Noise (100 Hz)	Static Drift	Temp Drift	Bandwidth
16 g	0.0005 g/LSB	0.751 mg-rms	2040 mg	0.15 mg/C	5256 Hz

Gyroscope

Range	Resolution	RMS Noise (100 Hz)	Static Drift	Temp Drift	Bandwidth
2000 /s	0.061 (/s)/LSB	0.0280.07 (/s)-rms	0.51 /s	0.0050.015 (/s)/C	5256 Hz

Magnetometer & Barometer

Magnetometer Range	Magnetometer Resolution	Barometer Range	RMS Noise	Relative Accuracy
2 Gauss	0.0667 mGauss/LSB	3001100 hPa	0.5 Pa-RMS	0.06 hPa

Module & Electrical

Item	Min	Default	Max
Output Rate	0.2 Hz	10 Hz	200 Hz
Input Voltage	3.3 V	5 V	5.5 V
Operating Current (5 V)		12 mA
Sleep Current (5 V)		15 A
Operating Temp	40 C		85 C
Storage Temp	40 C		100 C

Dimensions & Pinout

Size (mm): A 15.24 B 15.24 C 2.54 D 12.7 E 2
Axes: Xright, Yup, Zout of PCB (right-hand rule)

Pins (112):
D0, VCC(3.35 V), RX(TTL in), TX(TTL out), GND, D1(GPS support), D2(X+ alarm/reset), VCC, SCL(Y+ alarm), SDA(Y alarm), GND, D3(X alarm)

Connectivity & Tools

• UART TXRX cross-connect to MCU

• IC with 4.7 k pull-ups on SCL/SDA

• External GPS (NMEA-0183) wiring to build GPS-IMU navigation (outputs latitude/longitude, altitude, heading, speed, displacement)

Software & Dev Kits

Windows PC suite for configuration, calibration (accel/mag/angle/height), bandwidth/rate selection, and raw/curve logging. Example resources for Matlab, Python, Raspberry Pi, STM32, ROS, Arduino, C/C#; CH340/CP2102 drivers; Android app; demo videos; Manual.pdf & Datasheet.pdf.

Applications

IoT sensing, environmental & bridge monitoring, robotics & automation, forklifts and mobile machinery, mining, consumer electronics, VR gadgets.

Details

Cost-Effective AHRS Barometer Provides High Accuracy for Z-Axis Angle, Inclination, and Air Pressure, Plus Acceleration, Gyro Angle, Magnetic Height, and Air Pressure Measurements.

WitMotion WT901B AHRS IMU includes accelerometer, gyroscope, magnetometer, and barometer. Offers 16g, 2000/s, 2 Gauss, 300-1100hPa. High resolution, low noise, wide bandwidth, temp stability -40C to +85C.

AHRS IMU WT901B offers 180 roll/pitch/yaw, 0.0055 resolution, 1 accuracy, 9-axis algorithm, UART/IIC, 200Hz output, -40C to 85C temp range, 3.3V-5.5V input.

WT901B AHRS IMU has MEMS sensor, 48MHz MCU, LDO power chip, and gold-immersed copper interface. It provides 0.06hPa pressure accuracy, stable fusion algorithm, and meets RoHS, CE, and ISO:9001 standards.

AHRS IMU WT901B uses WitMotion algorithm with Kalman filter for high angle accuracy. Suitable for IoT, VR, robotics, mining, bridges, and environmental monitoring.

AHRS IMU WT901B offers free, user-friendly software, plug-and-play test fixture, and configurable settings for calibration, output, and precise attitude measurement.

WT901B AHRS IMU offers real-time data measurement, powerful storage and export to TXT files, and intuitive 3D motion visualization. Features include acceleration, angular velocity, magnetic field data, and compass display for precise sensor monitoring.

AHRS IMU WT901B offers visual magnetic calibration, TTL/IIC MCU connections, GPS compatibility. Outputs latitude, longitude, altitude, heading, speed, displacement for navigation.

Development Kits include manual, datasheet, Windows software, CH340 & CP2102 drivers, sample code for Matlab, Python, Raspberry Pi, STM32, ROS, Arduino, C++/C#, and demo videos for Android and PC.

WT901B AHRS IMU undergoes rigorous testing: 3-axis turntable, 6 DOF vibration, extreme temperatures (80C to -40C), 72-hour aging, and high-temperature evaluations.

WT901B AHRS IMU dimensions: 15.2415.242.54 mm, 12-pin layout with analog/digital I/O, UART, I2C, and alarm outputs. Axial directions defined by right-hand rule; X right, Y up, Z outward.

AHRS IMU WT901B from WITMotion includes sensor module, catalog, promo card with QR codes for docs and support.