Proximity Sensor Smto-8E-Ns-M12-Led-24 Electric, Contactless, Npn, for Drives with T-Slot, without Mounting Kit, with M12 Plug. Design=For T-Slot, Authorisation=Rcm Mark, Ce Mark (See Declaration of Conformity) =To Eu Directive for Emc, Materials Note= (* Free of Copper and Ptfe, * Conforms to Rohs) , Measuring Principle=Magneto resistive, Festo