Hi Guys
I would like to design a laser beam break detector.
The beam would be approx 2-3 meters long with a 15-20 degree angle scan projection from source.
It would need to detect a thin metal rod 5-10mm moving approx 60 to 125 mph.
The rod would only need to be within the laser scan area.
This forum is for people who are using the Samsung smartthings ™ home automation platform, so all of the questions and answers are assumed to be within that context. 
Are you using a smartthings account? If so, do you have a smartthings/Aeotec hub, and if so, which model?
It would probably be possible to do what you’re saying with SmartThings, but it would require using some additional devices as intermediaries. Some community members have done something similar using the kind of detection sensors that are used for garage door openers.
If you intend to work with the Samsung smartthings platform, I can give you some links to those project reports and you might find something helpful there.
If you aren’t going to be using smartthings, you’ll need a more general sensor forum. There’s probably already something like what you’re trying to do on the instructables or hackaday sites.
Here are a couple of examples. These are typically referred to as “break beam sensors.“
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also, Reddit has several subforums where people discuss break beam sensor construction that might be helpful:
https://www.reddit.com/r/arduino/comments/15i0zom/i_am_trying_to_use_these_2_sensors_to_detect_when/
https://www.reddit.com/r/homeautomation/comments/1045bfe/break_beam_sensor_recommendations/
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