Quote:
Originally posted by MrSelfDestruct
In schools with fire alarms, the pull switches have a small glass tube across the switch that will break when it is pulled. Is that just UV dye so that they can spot the kid who set off a false alarm, or does it serve another purpose? If it does do something else, why are half of them missing in schools I went to?
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in older non-adressable alarm systems, that is, each individual pull station couldnt be called up on a monitor, the glass rods were there so someone could determine which pull station had been activated. either your school is short on funds, or they upgraded their alarm panel.