Arbor Scientific BeeSpi V Photogate Timer, Detects, Measures, and Displays Speeds of Any Objects That Pass Through

I'm a retired physics teacher, I still tutor students and I do a lot of hands-on labs which I have found to be far more effective, and fun, student learning tools , and student preferred, than "virtual" computer simulations. This product is great for any motion lab . Great product, should be in every physics classroom for easy data, to show concepts without the serious math, calculus, involved.

Liked the product. Worked well. Would be good if it were in mph.

This is pretty cool. Trying to figure out how fast I throw darts is not the easiest thing in the world to do. I thought maybe I could mount this somewhere in such a way that I could throw a dart through it. It is not big enough to do that. But I was able to move the devise itself the way a dart would be thrown. I "throw" it, not letting go of course, past a stationary object (a piece of velcro suspended from the ceiling) and get a pretty good idea of how fast a dart would be travelling if thrown at approximately the same speed. Believe it or not, it works pretty damned good!

Works great, good price, Fast delivery

This unit does exactly the right thing. Easy to use, accurate, and repeatable. It's the best answer that I have found.