OPB780Z
Sensor, Reflective, Color, 5V Emitter, 4.5V Detector, Wire Mount, 120 mW

From Optek (TT Electronics)

Body StyleRectangular
FunctionProximity
Mounting TypePanel
OutputTTL
Primary TypeLight Sensor
Sensing ModeReflective
TechnologyPhotoelectric
TypeColor Recognition
Voltage, Supply5 V

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