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Topic: Sensor for Measuring Linear Speed (Read 238 times) previous topic - next topic


Hello everyone,

I am looking for some sensors which will enable me to measure the linear velocity of an object passing through a "gate". Essentially we can think of this as an object being fired (I can have the object go through a gate), and I will need the velocity of the object at the beginning/end of the gate. The speed of my object will likely range between 2 and 25 meters/sec. A good accuracy will be important (I would plan for at least within 0.1)

I would plan to attach to an arduino, however would be happy to purchase a ready made package and minimize the chance of error with my "tinkering".

Thanks for any suggestions.

Best regards,


Feb 02, 2016, 09:48 pm Last Edit: Feb 02, 2016, 09:49 pm by jremington
A photogate comes to mind. Very simple and accurate for DIY.


Is there a pre-built photogate that would be available for purchase? If not, would you be able to recommend which components would work best to build a photogate?

Thanks for your help.




Here is a larger commercial photogate. There are plenty of DIY articles on the web.


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