What are the two major categories of sensors in intrusion detection systems?

The two major categories of sensors in intrusion detection systems are indeed perimeter and interior.

Perimeter sensors are designed to detect unauthorized access to the outer boundary of a protected area. This category includes devices such as fence-mounted sensors, motion detectors, and infrared beams that form a protective barrier around physical spaces. These sensors trigger alerts if there is an attempt to breach the perimeter, enabling a proactive security response before an intrusion can occur within the protected area.

Interior sensors, on the other hand, are placed within a building or secured area to detect unauthorized access once the perimeter has been breached. This includes devices such as door and window sensors, motion detectors, and glass break sensors. They are critical for monitoring movements and activities inside a facility, ensuring that security teams can respond immediately to potential threats.

This distinction between perimeter and interior sensors is essential for effective security strategy, as it allows for layered security measures that enhance overall protection. Integrating both types of sensors into an intrusion detection system creates a comprehensive approach to safeguarding an area from potential intruders.