IO-Link is a standardized communication protocol for industrial automation, not a specific brand. The "Photoelectric sensors O19 miniature type" refers to compact photoelectric sensors compatible with IO-Link, often produced by manufacturers like Sick AG (Germany), Balluff (Germany), or Omron (Japan). These sensors are widely used in manufacturing, logistics, and automation industries for object detection, positioning, and quality control. The O19 miniature design emphasizes space-saving installation in tight industrial environments while maintaining high precision and IO-Link's smart sensor capabilities.