... 2.Output:NPN or PNP,NO/NC selectable. 2011--SL/SC series Proximity Sensor(Inductance & capactitive) Features:1, High ... 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 inspection for metal, plastic, glass, water, oil, ...