Photoelectric sensors are not a specific brand but a category of industrial sensors used for detecting objects, distances, or changes in light intensity. Prominent manufacturers include Omron (Japan), Sick AG (Germany), and Keyence (Japan). These sensors are widely used in automation, packaging, and manufacturing industries. Key products include through-beam, retro-reflective, and diffuse-reflective sensors, which enhance precision and efficiency in production lines. Companies like Rockwell Automation (USA) and Banner Engineering (USA) also offer high-quality photoelectric sensors for diverse industrial applications.