DS EN 50131-2-7-1:2012
DS EN 50131-2-7-1:2012 Alarm Systems - Intrusion And Hold-Up Systems - Part 2-7-1: Intrusion Detectors - Glass Break Detectors (Acoustic) Defines passive acoustic glass break detectors installed in buildings and provides for security Grades 1 to 4, specific or non-specific wired or wire-free detectors, and uses environmental classes I t