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Intrusion detectors, namely buried or aerial cable sensors, microphonic cable disturbance sensors, fence mounted detection sensors, electrostatic field disturbance sensors, video motion sensors, microwave sensors, networking and display/control devices; parts for intrusion detection systems, namely, sensor cables, connectors, transponders, transducers, transceivers, multiplex alarm monitors and processors, keypads, keyboards, display monitors, video display terminals, signal processors, central processing units, control switches, power supplies, lightning arrestors, weather station sensors, encryption systems, infrared illuminators, display panels

Design of intrusion detection systems