How Perimeter Security Sensors Detect Animal Intrusions - Visual Guide #2321109 (License: Personal Use)

The image illustrates a passive infrared (PIR) or active infrared beam sensor mounted on a fence post, emitting a conical red beam across a boundary; in the first panel, the beam is unobstructed; in the second, a dog’s silhouette interrupts the beam, triggering detection; in the third, the dog moves past, maintaining beam interruption. This sequence demonstrates how perimeter intrusion systems differentiate static vs. moving objects and respond to animal presence.

Used on security product pages, agricultural fencing guides, wildlife monitoring documentation, or smart farm tech blogs. Matches user intent for understanding sensor functionality, animal deterrence, or perimeter alarm setup.