Does an NPN Capacitive proximity sensor exist?

Question

With proxy sensors you generally have 2 types, the NPN and PNP type sensor. I also realized that you have inductive and capacitive proxy sensors...

My problem is that I've come to understand PNP to be for the capacitive and NPN for inductive sensors. Is this true? Is there an NPN capacitive proxy sensor and how does it work?

Answer 1

As brhans pointed in the comment NPN and PNP refers only to the output see here an example of NPN and PNP outputs:

See an example of capacitive proximity sensor from Omron that can be ordered either in PNP or NPN version.