WIRELESS SECURITY SENSOR SYSTEMS FOR WINDOWS AND DOORS

摘要

An wireless security sensor system includes a window frame (10) defining a window opening, a window sash movable relative to the window frame (10) between open and closed positions; and a sensor unit (18) embedded in the widow frame (10). The sensor unit (18) includes a housing (22) having an inner end within the window frame (10), an outer end (26) at a surface of the window frame (10) and a flexible à wave wire antenna (32) extending e.g. longitudinally of the window frame (10) from the housing (22). The housing (22) contains a sensor switch, a microprocessor, an RF transmitter and a battery for emitting signals to a master station or controller and the wireless security sensor system includes a magnet mounted in the window sash for actuating the sensor switch.