... is capacitive proximity switch. 2.Output:NPN or PNP,NO/NC selectable. 2011--SL/SC series Proximity Sensor(Inductance & ... counter sensor, speed sensor in such lines as mechinary, chemical, paper-making, light industry, etc..2, SL series is inductance proximity ... standard cable and interface, various dimensions available3, SC series is capacitive proximity switch,universal inspection for metal, plastic, ...