Description
The OPB711 consists of an infrared emitting diode and an NPN silicon phototransistor mounted “side-by-side” on parallel axes in a infrared transmissive plastic housing. Both the emitting diode and photosensor are molded out of black infrared transmissive plastic  to reduce ambient light noise. The photosensor responds to radiation from the emitter only when a reflective object passes within its field of view.

Features
● phototransistor output
● Unfocused for sensing diffuse surface
● Low cost plastic housing