 an inspection system, said system comprising: a first apparatus configured for insertion into a duct and comprising: (i) transmission means for transmitting an electromagnetic signal to induce an electromagnetic response in said duct and material surrounding said duct; (ii) detection means for detecting said electromagnetic response; (iii) conversion means for converting said electromagnetic response to a discrete signal; and (iv) communication means for reading and communicating said discrete signal to a second apparatus positioned remotely to said first apparatus; said second apparatus comprising: (i) storage means for storing said discrete signal; (ii) processor for processing said discrete signal; and (iii) display for displaying said processed discrete signal