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Shock Sensing Systems Protect Vulnerable Perimeter Points From Intrusion

NCJ Number
Security Volume: 25 Issue: 3 Dated: (March 1988) Pages: 78-80,82,84,86
B Zalud
Date Published
6 pages
Shock sensors cost somewhat more than other intrusion detection devices, but in certain circumstances they can deliver more protection and perform for years with little maintenance.
These sensors react to a sudden, measurable impact upon a surface rather than to a sustained vibration. Thus, they operate even when an office is open or a factory floor is filled with people working. In addition, many shock sensors can be installed near windows and doors, meeting the need for security devices that are heard but not seen. Some shock sensors detect movement mechanically, while others use a piezoelectric crystal and beam. They work in a simple manner, but need to be selected with attention to reliability, sensitivity adjustment, and power. Dual detection sensors provide improved service in terms of maintenance, nuisance alarms, and supervision.