... Output:NPN or PNP,NO/NC selectable. 2011--SL/SC series Proximity Sensor(Inductance & capactitive) Features:1, High frequency ... chemical, paper-making, light industry, etc..2, SL series is inductance proximity switch, mainly for inspection of metal objects ... . Round shape (eg.M12,M18), standard cable and interface, various dimensions available3, SC series is capacitive proximity switch,universal ...