A Passive Infrared (PIR) sensor is a type of motion sensor. This technology operates by detecting movement within a specific area by measuring the infrared radiation emitted by objects.
PIR sensors are most useful when they are integrated with an access control system. When a person approaches a door from inside the protected area, the PIR sensor detects their presence, triggering the access system to temporarily unlock the door. This seamless process ensures an efficient exit while maintaining a high level of security.