Few questions with that...
What issues are you having that need an alternative?
To do what job - perimeter detection i.e. alarm going off before burgular climbs into house/premises?
I have seen folks use E-Sheild beams on the outside of the windows... Dual tech PIR still have to be in the room and moving around to trip it... burgulary has progress alot further at this point...
I was taught this game by a firm believer in the reed switch & glass break etc to try and get the alarm to go off as they break in - some chance they will take off at that point - and also as a bonus can stay arm. Fantastic idea in my opinion.
Bookmarks