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8CH Follow Sensor Module 8 Channel Tracking IR Infrared Detector for #F23

5 Channel Infrared Reflective Sensor Tcrt5000 Kit Barrier Line Track Module #F5

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10PCS Smart Car Robot IR Infrared Obstacle Avoidance Sensor For New #A6-33

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AM312 PIR Motion Body Human Sensor IR Infrared Pyroelectric Detector Modul #A6-3