Radar is a detection sensor that uses radio waves/frequency to determine the distance, altitude, direction and speed of an object.
LiDAR (Light imaging, detection and ranging) uses pulsed laser lights to determine the distance of objects by measuring the time for the reflected laser to return to the receiver.
Fence sensors are sensors mounted directly on the perimeter fence to detect intruders attempting to breach the fence line. There are multiple types of fence sensors including cable, fiber optic or accelerometer-based.
The application of algorithyms to automatically analyze video streams of a monitored area and providing metadeta/insights on the spatial or temporal event to aid responders.