... switch. 2.Output:NPN or PNP,NO/NC selectable. 2011--SL/SC series Proximity Sensor(Inductance & capactitive) Features:1, ... High frequency response, long service life(more than 50 million), reliable action, high anti-interference, anti-cibration, corrosion ... as mechinary, chemical, paper-making, light industry, etc..2, SL series is inductance proximity switch, mainly for inspection of metal ...