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DWEII 7PCS IR Infrared Slotted Optical Optocoupler Module Speed Measuring Sensor 3.3V To 5V Photo Interrupter Sensor For Arduino

YELUFT 15Pcs Digital 38Khz IR Receiver Sensor Module + 15Pcs Digital 38Khz IR Transmitter Sensor Module For Infrared Remote Control Obstacle Avoidance

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5PCS GP2Y0A21YK0F Sharp IR Analog Sensor Distance 10-80cm Cable For Arduino. Other Sensors.

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IR Break Beam Sensor 3mm Leds Counting Module Split Through-Beam Photoelectric Switch (80cm Projection Distance)

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