Passive infrared (PIR) sensors use a pair of pyroelectric sensors to detect heat energy in the surrounding environment. These two sensors sit beside each other, and when the signal differential between the two sensors changes (if a person enters the room, for example), the sensor will engage

FroA Post-Implementation Review (PIR) is conducted after completing a project. Its purpose is to evaluate whether project objectives were met, to determine how effectively the project was run, to learn lessons for the future, and to ensure that the organization gets the greatest possible benefit from the project

Applications:

1. Lighting Controls.
2. Thermostats And HVAC Systems.
3. Smart Home And IoT.
4. IP Cameras And Surveillance Systems.
5. Digital Signage And More