I've got a nilfisk with the auto switch on but I'm not sure which model it is now. It's a great bit of kit.
Can't open that link on the phone but it will be a chip collector for attaching to a big bench planer or spindle moulder they are no good for fine dust which is probably what it means
I've got one of these too, nilfisk alto aero, just use a decent bag and change fairly regularly, doesn't cost much.