3/1/2023 0 Comments Pir mode vs flextime![]() Some suggestion about installation of PIR motion detection and active infrared beam detector:Ī. Passive Infrared Detectors are looking the changes of infrared energy level that caused by movement from objects (human, pets.etc). The working theory is infrared LED emits the infrared ray, then infrared ray get focused when go through spherical mirror and becoming infrared beam, after transmit long distance, the receiver accept the infrared beam. When the beam is cut (break) by the objects, then it will trigger the alarm.ĭue to infrared beam with cone spread effect, the active infrared beam detector can not transmit long range distance. As our experience, it's reasonable to place (install) infrared beam detector in the distance of 20-300 meters. The active infrared detector with professional name: Photoelectric Beam Detector, it consists of alignment hole, beam strength LED indicators, spherical mirror, LED.etc. Different from active infrared detector, the passive infrared detector doesn't emit the infrared ray, it receives the infrared ray that is emitted by objects. Active infrared Detectors are using dual beam transmission as structure, one side with transmitter for emitting infrared ray, the other side with receiver for receiving the ray, it is suitable for the outdoor point to point intrusion detection. ![]() The principle of working theory is different for both kind of detectors. Infrared intrusion detector (sensor) mainly includes active infrared detector (AIR) and passive infrared detector (PIR). ![]()
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