TECHNOLOGY NEWS

Alarm devices operating on the same principle as microwave detectors, with the difference that they emit ultrasonic waves instead of microwaves. Ultrasound does not penetrate through windows and walls, but they are very sensitive to air movement. For this reason, they are intended for installation in tight spaces, where there are no devices can cause interference such as vibration-type fans, trembling windows. Therefore, their use is limited and usually use ultrasonic sensors for car alarm installations. During the assembly is very important to the attachment of an ultrasonic detector to the stable structure is not subject to vibration.