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Level Monitoring Switch PSN Product detail PSN-O Float switches for emptying. On reaching the upper switching threshold the switching mechanism activates the pump. On reaching the lower switching threshold the pump is switched off. This float switch can also be used as run dry protection. PSN-F Float switches for filling. On reaching the lower switching threshold the switching mechanism activates the pump. On reaching the upper switching threshold the pump is switched off. PSN-X Float switches for filling and emptying. PSN-..+ ST Float switch with plug and socket for pump connection. PSN-O DB Float switches for emptying with integrated cable breakage and short-circut monitoring, with gold flashed contacts. PSN-X-SP Float switches for filling and emptying PLC application and for intrinsically safe circuts, with gold flashed contacts. Part No. Order Reference Description Cable length Weight in g 234166 PSN-O 3 m for emptying 3 m 500 234173 PSN-O 5 m for emptying 5 m 650 234180 PSN-O 10 m for emptying 10 m 1000 234197 PSN-O 15 m for emptying 15 m 1350 234203 PSN-O 20 m for emptying 20 m 1700 237082 PSN-O 30 m for emptying 30 m 2400 234210 PSN-F 3 m for filling 3 m 500 234227 PSN-F 5 m for filling 5 m 650 234234 PSN-F 10 m for filling 10 m 1000 234241 PSN-F 15 m for filling 15 m 1350 234258 PSN-F 20 m for filling 20 m 1700 258421 PSN-F 30 m for filling 30 m 2400 234265 PSN-X 3 m for filling and emptying export-version without protective conductor 1 SPDT 3 m 500 234272 PSN-X 5 m for filling and emptying export-version without protective conductor 1 SPDT 5 m 650 234289 PSN-X 10 m for filling and emptying export-version without protective conductor 1 SPDT 10 m 1000 234296 PSN-X 15 m for filling and emptying export-version without protective conductor 1 SPDT 15 m 1350 234302 PSN-X 20 m for filling and emptying export-version without protective conductor 1 SPDT 20 m 1700 237174 PSN-X 30 m for filling and emptying export-version without protective conductor 1 SPDT 30 m 2400 234319 PSN-O + ST 5 m Float switch with plug and socket for pump connection 5 m 750 234326 PSN-O + ST 10 m Float switch with plug and socket for pump connection 10 m 1100 234333 PSN-F + ST 5 m Float switch with plug and socket for pump connection 5 m 750 234340 PSN-F + ST 10 m Float switch with plug and socket for pump connection 10 m 1100 234457 PSN-O DB 5 m for emptying with integrated cable breakage and short-circuit monitoring, with gold flashed contacts 5 m 650 234364 PSN-O DB 10 m for emptying with integrated cable breakage and short-circuit monitoring, with gold flashed contacts 10 m 1000 234371 PSN-X SP 5 m for filling and emptying for PLC application and for intrinsically safe circuits, with gold flashed contacts, export-version without protective conductor, 1 SPDT 5 m 650 234388 PSN-X SP 10 m for filling and emptying for PLC application and for intrinsically safe circuits, with gold flashed contacts, export-version without protective conductor, 1 SPDT 10 m 1000 236092 PSN-X SP 15 m for filling and emptying for PLC application and for intrinsically safe circuits, with gold flashed contacts, export-version without protective conductor, 1 SPDT 15 m 1350 236115 PSN-X SP 20 m for filling and emptying for PLC application and for intrinsically safe circuits, with gold flashed contacts, export-version without protective conductor, 1 SPDT 20 m 1700 245254 PSN-X SP 30 m for filling and emptying for PLC application and for intrinsically safe circuits, with gold flashed contacts, export-version without protective conductor, 1 SPDT 30 m 2400 245261 PSN-X SP 40 m for filling and emptying for PLC application and for intrinsically safe circuits, with gold flashed contacts, export-version without protective conductor, 1 SPDT 40 m 3100