Through-beam type, Sensing distance 7 m, Light-ON/Dark-ON selectable, NPN, Pre-wired models (2 m), Red LED (700 nm), Timer function, Turbo function.Sensing methodThrough-beam typeSensing distance7 mLight sourceRed LED (700 nm)Connection methodPre-wired models.Sensing methodThrough-beam typeSensing distance7 mLight sourceRed LED (700 nm)Connection methodPre-wired models