Securbar

A securbar was a device used to open doors that had been locked down if an individual tripped a silent alarm by trying to access doors that were guarded by electronic beams. Electronic beams generally triggered the opening of a door, but if the beams were broken after authorized business hours, the doors would lock afterwards, trapping the intruders inside.

Text and facts from the “Securbar” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.