IO-Link is a communication standard used in industrial automation, not a brand itself. The 'Photoelectric sensors O9 miniature type' likely refers to a specific product line compliant with IO-Link technology. These sensors are typically produced by manufacturers like Balluff (Germany), Sick (Germany), or Omron (Japan), specializing in compact, high-precision photoelectric sensors for industries such as manufacturing, packaging, and logistics. The O9 series emphasizes miniature design for space-constrained applications, offering features like object detection and distance measurement with IO-Link's smart sensor capabilities.