FIELD: security alarm equipment. SUBSTANCE: device may be used for protection of perimeters of temporarily monitored regions, such as car parks, airport or storage places, sea or river wharfs, field bases. Device has radio beam security detectors, autonomous power supply units, UHF transmitters and receiving UHF monitor, which provides non-periodic transmission of alarm and self-test signals through radio channels. Device design provides increased speed of deploying and closing, increased stability with respect to operation on unprepared ground, increased stability to noise and sensitivity of detection of slowly moving targets. EFFECT: increased functional capabilities. 6 cl, 11 dwg
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