+A motion detector is an electronic [Sensor](/wiki/sensor) that detects movement in a specific area. Utilizing technologies like [Infrared](/wiki/infrared) or microwave, it often activates a response, such as an alarm or lights, for [Security](/wiki/security) or convenience.
+## See also
+- [Proximity Sensor](/wiki/proximity_sensor)
+- [Occupancy Sensor](/wiki/occupancy_sensor)
+- [Alarm System](/wiki/alarm_system)
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