The QS18VP6FF50 is a fixed-field photoelectric sensor designed for precise object detection in industrial automation. It operates on a 10-30V DC power supply and uses a visible red LED light source, making it easy to align during installation. The sensor has a fixed sensing range of 50mm (2 inches), meaning it detects objects within this distance while ignoring backgrounds beyond it, reducing false triggers. It features a PNP (sourcing) output, ensuring compatibility with various industrial control systems such as PLCs. The fast response time allows it to be used in high-speed applications, including conveyor systems and automated assembly lines