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![Passive infrared sensor - Wikipedia, the free encyclopedia](https://www.iarticlesnet.com/pub/img/site/s_05.jpeg)
Passive infrared sensor - Wikipedia, the free encyclopedia
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日期:2024-08-03
A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors. Multi-Fresnel lens ......看更多