Auto convert a polled directory

Is it possible to define or poll a directory to auto convert files to pdf (silently). Converted files would then be placed in anoted directory called "converted"

File name would be original file name or date_ time.

In particular I want to auto convert (silent) MS fax directory contents as the faxes come in. timed or polled and placed in another directory once done. Files to be converted are all tif

How would I exactly do this?