The intruder detector Strazh-1A is designed for the detection of a burglar’s intrusion (the penetration attempt) into a guarded space of an enclosed room and for the forming of “ALARM” notification by breaking output contacts of a signal relay.

The detector is counted on the continuous 24-hours operation.

The noise immunity of the detector provides the absence of false operation in the following conditions: the shifting of pets, the differential of background illumination, convective air currents, slow changes of background temperature, voltage impulses on the power circuit, the electrostatic discharge, electromagnetic fields of USV range.

The detector is not a source of interferences regarding analogous detectors, detectors of another type and purpose and also regarding home radio equipment.

The choice of the single-impulsive mode of operation is provided for (provides the higher sensitivity of the detector), and also of double-impulsive and triple-impulsive (ensures intensified noise immunity of the detector).

There is a device (button) in the detector STRAZH-1A which allows revealing unsanctioned opening of the detector’s case.

There is a red light indicator in the detector STRAZH-1A for the control of operational capability (the possibility of switching off a light indicator).