IO-Link is a standardized communication protocol (IEC 61131-9) used in industrial automation, enabling smart sensor and actuator connectivity. Ultrasonic sensors with IO-Link are produced by various global manufacturers, including key players like Pepperl+Fuchs (Germany), Balluff (Germany), and Sick AG (Germany). These sensors are widely used in industries such as manufacturing, logistics, and automotive for tasks like distance measurement, object detection, and level monitoring. IO-Link ultrasonic sensors offer enhanced diagnostics, parameterization, and integration with Industry 4.0 systems, making them essential for smart factory applications.