The TT Electronics OPB853A3 is a high-performance optical sensor designed for precise, non-contact object detection and counting in electronic systems worldwide. Featuring a compact PCB mount form factor and a sensitive photodarlington output, this sensor excels in demanding applications where space and accuracy matter. Its 0.125in (3.18mm) slot width allows for reliable, consistent performance in a variety of industrial, automation, and consumer electronics projects, offering global engineers flexibility and dependability for their designs.