IO-Link is a communication standard for sensors and actuators, not a brand itself. Capacitive sensors with switch point signal display are products offered by various manufacturers under the IO-Link protocol. Companies like ifm electronic (Germany), Balluff (Germany), and Pepperl+Fuchs (Germany) produce such sensors. These sensors are widely used in industrial automation for detecting objects, levels, or materials without physical contact. The IO-Link interface enables easy integration and parameterization in Industry 4.0 applications.