Answer
Mar 26, 2025 - 03:30 AM
Motion sensors are devices used to detect movement in a given area. Common types of motion sensors include passive infrared (PIR) sensors, which detect body heat, ultrasonic sensors, which use sound waves, and microwave sensors, which emit microwaves and detect changes in their reflection caused by movement. These sensors are widely used in security systems, automatic lighting, and various smart home applications.
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