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active infrared (ir) fence detectors, or photoelectric infrared fence sensors have been widely used in perimeter security systems. unlike the electric fence, the active infrared fence detectors utilize invisible infrared barriers to detect the intrusion. it has long detection/guarding range, low cost, high quality, and installation friendly

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a passive infrared sensor (pir sensor) is an electronic sensor that measures infrared (ir) light radiating from objects in its field of view. they are most often used in pir based motion detectors. pir sensors are commonly used in security alarms and automatic lighting applications.

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active infrared (ir) fence detectors, or photoelectric infrared fence sensors have been widely used in perimeter security systems. unlike the electric fence, the active infrared fence detectors utilize invisible infrared barriers to detect the intrusion. it has long detection/guarding range, low cost, high quality, and installation friendly

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