Home / Products / Axial Sensor / 9-Axis
【 High Performance 】Accurate output data: 3-axis XYZ (Pitch Roll Yaw) Acceleration + Gyro + Angle+ Magnetic field, Bluetooth coverage range: within 50meters (without obstacles like walls)
【 Robust Design 】low consumption Bluetooth 5.0 (battery life about 10 hours), compatible with Andriod Smartphone (Support multiple-connection up to 4 sensors with 1 Android phone), Windows computer
【 Worry-free Support 】Provide free PC software, Android App(Search WITMOTION on Play Store), Manual, Datasheet, Tutorial link: https://github.com/witmotion/WT901BLECL
【 WITMOTION ADVANTAGE 】Patented zero-bias automatic detection calibration algorithm can capture the motion state of the sensor and automatically calibrate the gyro bias, built-in Kalman filtering, digital algorithm
【 What You Get 】1*WT901BLECL BLE 5.0 sensor Type-C version, 1*Data Cable, 1* Guiding Card, Lifetime friendly customer service (Please kindly contact us if you need any help.)
Specification
Technical Specifications:
WT901BLECL’s scientific name is the AHRS IMU sensor. A sensor measures 3-axis angle, angular velocity, acceleration, magnetic field. Its strength lies in the algorithm which can calculate the three-axis angle accurately. The robust housing and the small outline makes it perfectly suitable for industrial retrofit application such as motion capturing, engineering machine monitoring, etc.
Persued for best data accuracy and stability: WTMOTION patented zero-bias automatic detection calibration algorithm and R&D dynamic fusion algorithm outperforms traditional accelerometer sensor.
Current: <40mA
Working Temperature: -40℃ ~ +85℃
Battery life: about 10 hours
Data output frequency：0.2-200Hz
Interface: Type-C, Low-energy Bluetooth 5.0
Baud Rate: 115200 (default, can not be changed)
Voltage: 3.3-5V, built-in rechargeable battery (260mAh capacity, 3.7V)
Output Content: 3-axis Acceleration+Angle+Angular Velocity+Magnetic Field+Quaternion
Range: Acceleration (±16g), Gyroscope (±2000°/s), Magnet Field (±4900µT), Angle (X, Z-axis: ±180°, Y ±90°)
Resolution: Acceleration (0.005g), Gyroscope (0.61°/s), Magnet Field (16 bits)
Angle Accuracy(after calibrated): X, Y-axis: 0.05° (Static) , X, Y-axis: 0.1° (Dynamic)
Note: Z-axis angle will be affected by magnetic field. It is required to calibrate and keep the sensor at least 20cm away from the stuff like metal that may create magnetic field interference.
Hardware Analysis (In-built WT901BLE)
● In-built nRF52832 Bluetooth chip: coverage range within 50 meters
● Built-in Cortex-M0 core processor which can operate reaching 168MHZ, faster speed in the data processing
● Embedded highly-integrated MEMS accelerometer and gyroscope sensor, more stable and reliable in attitude measurement
Plastic Casing
● Net Weight: 20g
● Size: 51.3mm x36mm X15mm/ 2.02" x 1.41" x 0.59"
● Two Wings design at the edge, better for installation
● User Friendly: LED lights Indicator, Standby (Blue flashes once and disappear), Charging(Red light), Pairing(Blue flashing), Fully Charged(Red disappear)
WITMOTION Alrogithm Advantages
WITMOTION products are derived from the aerospace Satellite Attitude Determination Algorithm.
Built-in core algorithm:
● R&D Dynamic Fusion Algorithm
● Kalman filtering (program filter)
● Digital filtering
● State estimation algorithm
No need to study the complicated protocol of MPU6050/ 9250 to get the attitude angle.
Multiple-Connection
● WT901BLECL supports up to 4 devices multiple-connection with 1 Android phone at the same time via Bluetooth.
● There is a multi-BLE APP inside the tutorial. (without curve display)
Notice: The iOS APP is under construction at present. The sample code of iOS APP can be provided if customers have requirements.
Our Promise
● 30 days return refund policy for any quality issue
● Quality secured, 100% inspected & tested at factory before shipping
● Remote diagnostics and lifetime technical support by Witmotion engineering team
Certification
● WT901BLECL is CE certified, meets EU standards for health, safety, and environmental protection
● WitMotion Shenzhen Co.,Ltd is in conformity with Quality Management System Standard: GB/T19001-2016 idt ISO9001:2015.
Tutorial
● Manual with detailed instructions
● Datasheet with complete communication protocol for developing
● Free software for Windows PC (Minimu.exe)
● Two APP for Android phone (single-connection & multi-connection)
● Instruction demo video (search WITMOTION on Youtube)
● CH340 & CP2102 serial Drivers
Packing List
● 1x WT901BLECL BLE 5.0 inclinometer
● 1* Type-C charging cable (25cm)
● 1x Instruction card printed with QR code of document center
Free & Genuinely Useful Software
Compared with traditional sensor’s simplied serial software, WITMOTION software offers several advantages over competing sensor:
● configurations setting
● dashboard, 3D DEMO, data curve & chart display in real-time
● data record and playback, raw data reviewing, and more
Notice: There is no software for the Linux, Python, or Mac system at present. Witmotion software is provided as free, compatible with the Windows system only, including Win 10, 8, 7, XP.
PC Software for Windows
3D Display
Data Curve Display
Configuration
Android App (Single-connection)
WT901BLECL supports Bluetooth connection with Android smartphones.
Easy connection, simply chooses the module (BLE 5.0 Series), pair with the device, and start using.
Search WitMotion on Google Play Store and download it.
Android APP
Config Menu
Real-time Data Viewing
Recorded Data
About WITMOTION
Established in 2014, WitMotion Shenzhen Co.,Ltd aims to become a global leader in attitude sensor, AHRS IMU. Foud out more here in our Witmotion Brand Store on Amazon.
The company is dedicated to make attitude measurement and tilt angle sensing solutions more accessible and easier for engineers around the world. Widely used every day by customers in over 50 countries for energy and electric power, tower control, Monitoring, engineering machinery, medical, academic, integrated system, more developing projects.
WITMOTION' s R&D Dept.
● 20+professional engineer industry's top R&D team, and has a long-term collaboration with the Beihang University PhD team.
● WitMotion R&D protocol and Dynamic Fusion Algorithm
● over 50+ patents and software program
Research and Development Facilities:
● World's top-level of triaxial nonmagnetic turntable: All finished items will be calibrated through the turntable, ensuring the X Y Z angle's accuracy.
● High& low temperature test chamber, making sure that the sensor can actually work well under -40℃ ~ +85℃ environment
● Vector Network Analyzers(VNA): Bluetooth antenna impedance matching
● 6 degrees of freedom vibration test bench: sensor's high performance and stability secured under vibration and dynamic environment
Premium Components & QC System: All components are selected and certified under a strict quality control system from the procurement, manufacturing process to assembly, inspection.
Automatic Production&Assemble line of Factory:
Automatic Solder Paste Printing, Imported Placement Machine, Multi-temperature Reflow Soldering, Fully Automatic Inspection
 WT901BLECL Inclinometer |  BWT901CL Accelerometer |  BWT61CL Tilt Sensor |  WT901 Digital Compass |  Military-grade HWT905 Magnetometer |  WTGAHRS2 GPS IMU | |
| Interface | BLE 5.0, Type-C | Bluetooth 2.0, Type-C | Bluetooth 2.0, Type-C | TTL | RS485 Modbus RTU | TTL |
| Compatibility | Android phone, Windows PC | Android phone, Windows PC | Android phone, Windows PC | Windows PC, Android phone, MCU Arduino, Raspberry pi, etc | Windows PC, PLC system, MCU Arduino, Raspberry pi, etc. | Windows PC, Android phone, MCU Arduino, Raspberry pi, etc |
| Input Voltage | 3.3-5V, in-built battery | 3.3-5V, in-built battery | 3.3-5V, in-built battery | 3.3-5V | 9-36V | 3.3-5V |
| 3-Axis Acceleration | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 3-Axis Angular velocity (Gyroscope) | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 3-Axis Angle | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 3-Axis Magnetic Field | ✓ | ✓ | ✓ | ✓ | ✓ | |
| Output Frequency | 0.2HZ-200HZ | 0.2HZ--200HZ | 0.2HZ--100HZ | 0.2HZ--200HZ | 0.2HZ--200HZ | 0.2HZ--200HZ |
| Housing | Plastic case | Plastic case | Plastic case | Aluminum case, IP67 waterproof | Plastic case | |
| Main Features | Value for money, Bluetooth range<50 meters, multiple-connection up to 4 units, 10 hours battery life | Bluetooth range<10 meters, multiple-connection up to 8 units, 4 hours battery life | Bluetooth range<10 meters, multiple-connection up to 8 units, 4 hours battery life | 9-axis High Accuracy sensor, Kalman Filtering | Military-Grade Accuracy, RM3100 magnetometer& SCA3300 temp compensation | Chinese Beidou navigation system+ GPS, High-stability IMU sensor |
Download Center
WT901BLECL BLE 5 0 Bluetooth Inclinometer Instructions Video
https://www.youtube.com/playlist?list=PL43tdDrVL_VAfKJBsq4kkwK40yXKtK-kk
FAQ
Q: Is the iOS APP available now?
A: The iOS APP is under construction at present. The sample code of iOS APP can be provided if customers have requirements.
Link to sample code of iOS APP:
https://drive.google.com/open?id=1hEb_kDNtK1ydkAwWcPWExnVoR7Q4i5NH
Q: Is the sensor compatible with MCU like Arduino?
A: The sensor is Bluetooth 5.0 communication, built-in nRF52832 chip.
If you need to connect the sensor with Arduino via Bluetooth, it is required to build a same nRF52832 chip on Arduino board as a master.
And the sensor can work as slave. So the sensor can communicate. It is recommended that you can study the sensor's communication protocol for research and development.
Please be noted that the service related to the sensor's integration is not supported.
Reviews
Nick
I needed a way to monitor the vibration of different locations to place a professional camera for streaming
Using
an old android phone and this sensor not only was I able to get
readings in real time but the data saved hours of labor and drilling
into walls that would have not been suitable for the camera
Kyle
has been exceptional for support, answering questions quickly and even
getting a software change to support multiple recording files names
I hope they will get a iOS version of the app soon
I
plan on using this sensor and anti vibration pads around the house to
help identify other items that are vibrating too much such as the garage
door opener
GEPO
I
had problems with the first unit I purchased. I followed the manual
provided but I could not get it to work. Also, the software on the
company website included source code examples for Windows but only the
compiled apps for android, not source code examples. So I sent and email
to the company contact, asking for source code examples for android.
The reply was almost immediate, very helpful and polite, with a link to
download the code samples. I then wrote again regarding the issues I
was having with the device not connecting neither via USB nor BlueTooth.
Again, the reply was immediate, and we went back and forth before
reaching the conclusion that the device was defective (I was worried it
was a compatibility issue with an old BlueTooth 4 device, but that was
not the issue). I asked Amazon for a replacement which arrived promptly
and is working perfectly.
So overall, although I had some issues, the customer support was outstanding and solved all of them.
As for the device, it does what it says it does, and well.
As
for the worries indicated in another review: I agree, the
documentation could be better and more clear, but it is clear enough. As
for the app not being on Google Play, I believe the app is an example,
not a commercial application. This is a sensor to be used in custom
solutions/applications, the software is just to show its capabilities.
But it is not spyware not does it contain viruses (I have a very strong
protection system with 3 different scanners and no one found anything).
Actually, the code package downloaded from the company web site even
includes firmware code and PCB layout, so actually it seems that rather
than trying to steal the customer's intellectual property they are
making their own available to their customers!
Anon
Everything
about this screams run to me. Ive use many chinese products but this
one scared me enough that I abandoned moving further.
The
documentation doesnt follow its own logic, the websites dont work all
the time, and the app isnt supported on Google Play. Skip this product
if you have any intellectual property to protect, or just want to
protect your own property and information.
HZ
I
just received the unit for a few days and haven't spent a lot of time
on it, but based my limited experience, this unit does what it is
advertised. No complaint here so far.
Kyle is very responsive to questions.
UPDATE
as of Aug 2020: I wish I could leave a 6-star for Kyle's tech support.
Always gets back to me promptly with a lot of details. Awesome!
Jaber House
Great product and excellent customer service and support. I use this device to level my RV (travel trailer) without getting in and out of the truck to check the level. Kyle is very responsive with questions and support about setting up and using the device.
Logan Rudd
Couldn't have hoped for more. The wit-motion app that works with the sensors allows you to start recording data from multiple sensors straight out of the box. Also, Kyle from Wit-motion was extremely helpful and responsive with any doubts that I had before and after the purchase. Hope to do business with this company again!
Outback Coyote, Inc.
Well made. Small.
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