The DS1102i Detector Series uses micro processor based sound analysis technology (SAT) to listen for the specific frequencies associated with breaking glass. The DS1102i and DS1102i‑CHI can be used to detect breakage of plate, tempered, laminated and wired glass types. A built-in environmental test feature alerts the installer to false alarm hazards in harsh environments. The square detectors mount on ceilings or walls. Square detector uses microprocessor-based sound analysis technology (SAT) to listen for the specific frequencies associated with breaking glass.