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| | Surveillance - Metal Detectors |
 | | Mounted, or walk-through, detectors are not small, but they are even less invasive than the others since the person and/or items to be inspected need only to pass through the detector without any close personal contact. |
| | Mounted detectors are typically more expensive than the others, but they are built to endure high traffic, hard weather, and rough handling (“Walk-Through,” n.d.). |
| | Mounted models, although more expensive than hand-held models, are more effective and less intrusive, according to many (for example, Volokh and Snell, 1998, and Shelby County Schools, 2002). |
| students.ed.uiuc.edu /jkelsey/surveillance/detectors.htm (4488 words) |
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