Motion Sensors: It’s the most
essential and common form of protection. Passive infrared sensors: Detect motion by sensing a sudden change in heat. Dual Tech motion detectors use two different technologies in the same unit: passive infrared and microwave. These devices are designed to avoid false alarms since both technologies must detect motion before setting off the alarm. Photoelectric Sensors: These sensors project a beam of light across a hall or doorway to detect motion and are triggered when a person passing through interrupts the beam. Glass Break Detectors: Usually mounted near windows to detect the specific high frequency sound of glass
etrieved July 10, 2007 from the Oregon State Legislature database.
medical alert service
Moreover, the Congress has an oversight function, and it can and does react when people respond negatively to administrative actions, as occurred in the SSI and disability review examples Derthick, p.