The FS-N40 series by Keyence is a series of digital fiber optic sensors amplifiers. Because of the built-In indicators of these sensors allows for a quick status/alignment check. The OLED display is easy to read and the menu structure is incredibly simple. The display also features intuitive navigation and easily understandable messages. As a result of a wide variety of fiber optic head options the FS-N40 series can detect virtually any target. By choosing one of these sensors tough contrast changes, small targets, and long distances are no issue. We are here to help you find the right sensor for your application, so do not hesitate to contact us with your questions.