QRD1114 Reflective Object Sensor

From the shop's description

The QRD1114 reflective sensor consists of an infrared (IR) emitting diode and an NPN silicon photodarlington mounted side by side in a black plastic housing. The on-axis radiation of the emitter and the on-axis response of the detector are both perpendicular to the face of the QRD1113/14. The photodarlington responds to radiation emitted from the diode only when a reflective object or surface is in the field of view of the detector. Features: Phototransistor output No contact surface sensing Unfocused for sensing diffused surfaces Compact package Daylight filter on sensor (Most important feature)