A
Alarm
You park them out of the wayWith beams, what if you've got parked cars in the driveway.
How do they work exactly, are they just one line that goes across the front of your property? or do they cover an area?
Yes a line, inside the boundary, but can be a set distance no need to be at the perimeter or at the property
Whats to stop someone just climbing over or crawling underneath the beam?
Correct setting out and positioning and not advertising them
Can anyone recommend any specific products beams or pir detectors that will give a low false alarm rates.
Beams inherently have a low false alarm rate. Takex for instance is one make.
Are we talking gjd pir detectors?
No, but they are another possibility
P.S. I did check the NIS website for installers, most on there deal in internal burglar alarms, one guy even told me that I was after something that hadn't been invented![/quote]
What questions were you asking? Although the one saying not invented does seem a little strange.