Our local shop, last March. The “break Glass Sensors” were a waste of money.
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only if they weren't responded to Bri .....
used to have them in my old workshop and caught several groups of kids over the years, bricking my windows ....
on one occasion, a Sunday lunchtime, shift change at the local plod shop, they all went off ...
had 5 down the length of the shop ...
both shifts responded and i had my system set up so the monitoring station could tell me exactly what was in alarm state, so I knew exactly where to look when I arrived on site ...
rang plod and told them to head for the park alongside my workshop as the windows were likely being bricked ...
they arrived both ends including a dog handler and rounded up about 20 ****ing teenagers ...
had to call for a big van

...
took 'til about 8 in the evening to process the little b'stards and get all parents in to the station ..
all locked up 'til collected

....
many of them from 'homes' that'd know better ...
bet some took a kicking when they got home ....
did well over a grands-worth of damage, which was eventually paid for by parents ...
all got a full police caution on their newly acquired records
My break glass detectors did well for me.