U-shaped fork sensors use through-beam photoelectric technology to detect objects passing through the slot. The rugged one-piece housing keeps the emitter and receiver in alignment. These visible red-light models are available in sensing distances up to 220mm, with quick-disconnect termination. Light / Dark selectable operation allows easy setup.
Fork sensors (also called slot sensors or "U" sensors) offer some advantages over standard through-beam sensors.
Red Light Fork Sensors