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Detectors and sensors send out a high frequency sound wave while listening for bounce back. They are available different versions like indoor and outdoor motion detectors, photoelectric detectors, control systems for burglary and fire alarm applications etc. Motion detectors reject false alarms caus ed by spot temperature changes such as small to medium sized animals, air conditioners, or moving curtains. Microwave/PIR polling loop motion sensors offer unmatched level of operation with many advanced features. They are ideal for commercial applications where superior false alarm immunity is needed. They are designed to use with ADEMCO control panels to support serial number pooling loop devices. Microwave sensors operate at different frequency ranges. They utilize a doppler radar signal, which bounces microwaves off to an object, and then measure the frequency of the returning microwaves. They offer greater distance of coverage. They can be placed behind any object as they can penetrate walls. A wide range of microwave detectors and sensors is manufactured by host of manufacturers.
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