Interior Sensors

Interior intrusion-detection sensors are used to detect unauthorized entry or attempts to enter specific areas or spaces within a building. These sensors usually are not designed to be weatherproof or rugged enough to survive in the outdoors. This type of sensor should not be used outdoors unless described by the manufacturer as suitable for outdoor use.

Interior intrusion-detection sensors generally perform one of three detection functions:

• Detection of an intruder penetrating the boundary of a protected area
• Detection of motion by an intruder within a protected area (volumetric motion sensors)
• Detection of an intruder touching or lifting an asset within a protected area (point sensors)

Duress switches are not intrusion-detection sensors. They are included in this discussion because they usually are wired to equipment monitoring the interior intrusion-detection sensors.