What are PIR motion sensors and how do solar security lights use them?

What are PIR motion sensors?

A PIR motion sensor (PIR stands for “pyroelectric, or passive, infrared”) is a device that detects movement and heat. These devices, also known as solar PIR units or IR sensors, create a grid that is triggered by changes to infrared energy levels. PIR Motion Sensors are More Common Than You Think Solar security systems utilize…

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