The Photoelectric Sensors subcategory within Sensors & Measuring Devices features devices that use light to detect the presence, absence, or distance of an object. These sensors are versatile and widely employed in industrial automation for tasks like object detection, positioning, and counting. Photoelectric sensors work by emitting a light beam (visible or infrared) towards a target; the detection is based either on the interruption of the light beam by the object or the light reflected back from the object. They are available in several types, including through-beam, retro-reflective, and diffuse, each suited to different applications depending on the environment and the nature of the objects being detected. This subcategory is crucial for applications that require fast and accurate non-contact detection, contributing significantly to the efficiency and safety of automated processes.