Photoelectric sensors are advanced devices used in automation and industrial applications to detect the presence, absence, or distance of objects using light beams. They operate by emitting a light signal (infrared, visible, or laser) and measuring the reflection or interruption to determine object detection. Key types include through-beam, retro-reflective, and diffuse reflective sensors, each suited for different sensing ranges and environmental conditions. Common products in this category include proximity sensors, fiber optic amplifiers, and light curtains. These sensors are essential for precision tasks such as object counting, positioning, and quality control in manufacturing, packaging, and logistics systems.