The OPB811L55 from OPTEK TECHNOLOGY is a reliable and versatile Photointerrupter Transmissive module designed for various sensing applications. It features a high-performance 9.53mm Phototransistor that ensures accurate detection and measurement of objects or obstacles. The 4-Pin package enables easy integration and stable connections with external devices. Ideal for use in robotic systems, industrial automation, security systems, and much more, this Photointerrupter guarantees exceptional performance and reliable functionality. The OPB811L55 is conveniently packaged in a bag, providing a cost-effective and efficient solution for your sensing needs.