Parallax X-Band Motion Sensor Module (32213)X Band Motion Detector Overview: The X Band Motion Detectors sensor is a common component in security systems and automatic door openers and can detect movements within a room, yard, or even on the other side of a wall. The X Band Motion Detector operates in the X band frequency, at 10. 525 GHz and indicates detected movements with oscillations in its high low output. Sensitivity is manually adjustable with a potentiometer, offering direct line of