Retro-reflective with M.S.R. function, Sensing distance When using the E39-R1: 0.1 to 2 m, Light-ON/Dark-ON selectable, PNP, M12 connector models, Red LED (700 nm).Sensing methodRetro-reflective with M.S.R. functionSensing distanceWhen using the E39-R1: 0.1 to 2 mLight sourceRed LED (700 nm)Connection methodM12 connector models.Sensing methodRetro-reflective with M.S.R. functionSensing distanceWhen using the E39-R1: 0.1 to 2 mLight sourceRed LED (700 nm)Connection methodM12 connector models