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Tim
Reviewed in the United States on February 17, 2025
Product worked very easily with all the hard work done by the manufacturers themselves. Awesome product
Amanda
Reviewed in Australia on September 26, 2024
I used this product for research and it can sample data accurately from my experience. Also it works quite conveniently and real-time data can be easily accessed by my mobile through Bluetooth. Also their staff are very approachable and friendly, answering all the uncertainties I met when using this accelerometer.
EECS
Reviewed in Australia on September 22, 2024
I bought this for measuring angles: specifically for setting up woodworking machinery. The advertised 0.2 degree accuracy would not have been sufficient, but the precision of 0.01 degrees gave me enough hope to risk buying one, and I was not disappointed.Certainly the initial "out-of-the-box" accuracy is not high - I am not sure if it was even within 0.2 degrees. However, you can zero the angle reference to the current plane, and for the next few minutes (maybe a bit longer) you get 0.01 degree accuracy before the readings start to drift. You can test this easily by mounting the WT901BLECL on a straight edge, zeroing, and then inserting a piece of paper under one end of the straight edge. The WT901BLECL is both accurate and repeatable (+/- 0.01 degrees) short-term.My main criticism would have to be the plastic shell, which does not even have a very flat surface on its bottom, let alone perpendicular sides! The first thing you need to do is to mount it on something flat.Battery life is excellent - one charge kept it running for a full day of measurements.Compared to self-contained angle measuring devices (ones with inbuilt displays) it is very nice to be able to have the display somewhere easy to read while the sensor is in some awkward position.Machinist's levels can do better than 0.001 degrees, but at 0.01 degrees I am starting to see variations in the flatness of my "machined flat" cast iron table, so for me the benefit of higher precision would be minimal.Being battery-powered, small and light means I can mount it next to the spindle motor on my CNC router and check how the angles vary as the spindle moves around (x, y and z).Note: I would not trust this to measure a 90-degree angle; instead, keep the WT901BLECL horizontal and mount it on an accurate square if you need to measure a vertical. The WT901BLECL can be used to compare two vertical surfaces within 0.01 degrees, or to compare two horizontal surfaces within 0.01 degrees, but going between a horizontal surface and a vertical surface even short-term probably gives you closer to the specified 0.2 degree accuracy.Overall I am very happy with this purchase.
BH6W
Reviewed in the United States on August 17, 2024
Got this to record some roller coaster acceleration data. Long story short, if you're willing to spend some time putting external software visualization together, it's great.The Good:* Quick and easy to setup and use, no issues with the app. All of the axes looked great out of the box.* Very high precision in all measurements based on my observation.* Data can be exported to a few different formats to make use of in your own way.* Compact and easy to integrate or mount on your bodyWhy I gave it a mixed review:* After a few uses one of the axes began to skew and it needed recalibration. It's not difficult to do, and perhaps it only needed to be done once, but I didn't want a product that may require recalibration often. Once in a while, but not after a couple of uses. I also found it odd that a device that went through QA check needed calibration out of the box, but maybe it's due to magnetic field variation. That only made me wonder, if it needs such calibration often. That's fine, just annoying.* The PC software is functional, but seemingly not useful except to show a proof of concept.* You can see the data, but there didn't appear an (obvious or easy) way to export the visual data as a video file. I'd rather not have to create or use separate tools to generate visual overlays, but that would seem the best approach with this product.* The best way to use this would be to simply export the raw data and import it into software tools of your own designIt's possible I missed some tools in the software, it just wasn't apparent.
Ram H.
Reviewed in the United States on May 9, 2024
This is a great sensor and works very well. I had some difficulty with the setup initially but the technical support was amazing! Ai helped me troubleshoot the problem till the sensor Bluetooth worked with the C# sample application and source code they provide. It helps you to get start with your project faster that way. Highly recommended!
Grand S.
Reviewed in Canada on March 26, 2024
The sensor arrives quickly, I needed a little help to make it works correctly as I didn't not have the correct program or driver installed. I contacted the seller and he answers me quickly and send me the correct program and driver and after that it was perfect. I have two devices, one help me to park my camper at ground level, and the second is for my school as i'm a science teacher. I recommendend the product and seller.
Ryan C.
Reviewed in the United States on August 4, 2023
I struggle with how to rate this as the hardware itself seems really good. And it is easy to install the drivers and test with their own software. But for my use case it does not work as there are no generic Windows drivers. So, things like Windows Store apps, Unity, .NET Xamarin/MAUI, and generic programing frameworks will not detect the device.They have their own libraries and examples for custom development which seem easy enough. But I was just trying to get sensors on my PC to help aid in cross platform development (like a Surface Pro has built in for example) and not be tightly coupled to this specific device.Their support is great too as I emailed to ask, and they quickly confirmed there was no generic Windows driver. They also promptly offered a refund.So, depending on your use case this may or may not be the device for you. It does work with Windows, just not in a generic fashion.
Customer
Reviewed in the United States on July 9, 2023
After working with this sensor, I learned that it does not have an onboard clock. Observations are timestamped according to the point at which they are received on the device receiving data over bluetooth. This is influenced by transmission lags and load on the device, meaning that there are large variations in the timestamps, and it is not possible to reliably relate them to clock time. I was informed by Witmotion support that another of their devices does have an onboard clock. It is not sold on Amazon, so I went to their website and ordered one. What they shipped me was a sensor with a different part number than what I ordered. They refused to replace it with the sensor I ordered, claiming that I somehow selected the wrong sensor even though *I clicked on a “buy now” link for the exact part number they gave me* and received a purchase confirmation for that number. I recommend staying away from this company!Update: I got a reply to this review asking me to contact the company via Amazon seller feedback. I did so, and they haven't replied. WitMotion I am willing to change this review if you send me the sensor I ordered. I will be happy to return the one I didn't order.
Aeroboffin
Reviewed in Canada on July 23, 2023
This is a small and light device. The documentation provided with the device and available on-line is excellent.I am in dispute with the manufacturer of a new car that I recently leased. There is obvious vibration which I wanted to measure. This device was perfect for obtaining saw-tooth plots in 3 main axes, and demonstrating that the car has a significant vibration problem (which the manufacturer had refused to accept).The Bluetooth allows the signals to be transmitted to a smart-phone (Android or i-phone) app. This was perfect as I was able to attach the device to the steering wheel (and other parts of the car), which would not have been possible without the wireless connection (wired to keep the battery charged also works). The i-phone GUI also worked well with Start and Stop buttons for recording when I was driving on a smooth road surface. The graphs were displayed in real-time (and also recorded on the phone for later analysis). The app has an aircraft style attitude and heading display. The on-off switch allowed easy control when the device was needed.
Kris
Reviewed in Canada on January 19, 2023
Everything works exactly as stated in the product description and the data output is incredible fast. Unlike other sensors there seems to be zero lag (imperceptible amount anyway) between what the sensor records and what you see.Edit: I noticed some reviews mentioning connectivity issues. You have to ensure that permissions are enabled to be able to connect. Without this enabled, the device will be listed but unable to connect within the app.
Randy
Reviewed in the United States on January 12, 2021
Once I got this working it was pretty good. The manual is fairly complete but the translation is rough.One important note. Android now requires location permission to pair to Bluetooth. This only makes sense in the mind of a Google engineer, but the "logic" goes like this. To pair you need the address, and if you have the address you can theoretically get the location from some big database that knows where every Bluetooth device is. So now you have to explicitly grant the permission in order to get the app to work, which makes your private information less secure. None of this is the fault of the device maker, though. Just remember, without location permission the device may reject pairing if you have a recent version of Android.Support email drew a response within minutes.
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