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Tags can be equipped with a built-in alarm which sounds when the tag detects tampering or unauthorized removal from the store. The tag not only triggers the store's electronic article surveillance system, [10] but also sounds an alarm attached to the merchandise. The local alarm continues to sound for several minutes after leaving the store ...
A security alarm is a system designed to detect intrusions, such as unauthorized entry, into a building or other areas, such as a home or school. Security alarms protect against burglary (theft) or property damage, as well as against intruders. Examples include personal systems, neighborhood security alerts, car alarms, and prison alarms.
Website. guardianalarm.com. Guardian Alarm is an American security company based in Southfield, Michigan. Founded in 1930, Guardian Alarm is the largest independently owned security company in the Midwest and continues to be ranked in the top 20 in the United States. The company has over 500 employees in various cities across the United States.
A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors. PIR sensors are commonly used in security alarms and automatic lighting applications. PIR sensors detect general movement, but do not give ...
An alarm-industry lobbying group estimates that 1.5 million customers still need to upgrade their fire or burglar alarms, while about half a million have medical alert devices that run on 3G; it ...
Perimeter surveillance radar. Perimeter surveillance radar (PSR) is a class of radar sensors that monitor activity surrounding or on critical infrastructure areas such as airports, [1] seaports, military installations, national borders, refineries and other critical industry and the like. Such radars are characterized by their ability to detect ...
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