You can purchase an alarm style photobeam detector, power it connect an analog to automation device to it like the X10 wireless style door/window switch (DS12A) or whatever automation you utilize. IE: here it is wired to the Leviton OmniPro 2 panel.
Here is a list of a few of these on Amazon. They are all similar in construction.
Photobeam
A few years ago purchased an "el cheapo" small footprint photo beam for around $5 on Ebay.
I used Radio Shack photobeam for my driveway in the 1990's.
Here is a list of a few of these on Amazon. They are all similar in construction.
Photobeam
A few years ago purchased an "el cheapo" small footprint photo beam for around $5 on Ebay.
I used Radio Shack photobeam for my driveway in the 1990's.
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