TECHNOLOGY NEWS

This dual detectors with alarms in a passive infrared detector and a microwave detector. Alarm signal output dual detector is triggered only when both detectors simultaneously analyzed signal is defined as motion detection. Dual detectors have been developed primarily with a view to the effective elimination of false alarms that are caused by drafts, sudden changes in temperature, a strong source of heat and direct sun light detectors. Eliminate false alarms, which are the source of the above, it is mainly thanks to a microwave detector, which is totally immune to this type of confounding factors. On the other hand, by using passive infrared section eliminates unwanted microwave detectors ability to pass through metal objects, which directly resulted in the detection of objects moving behind them. With the increased resistance to diverse sources of interference dual detectors (microwave & IR) are designed to work in very difficult environmental conditions. Basic principles and characteristics of the assembly are the same as in the case of passive infrared detectors, taking into account the fact that most microwave detectors react to the move in the direction from and to the detector.