E-Field Antenna - Model # CTC113

http://cgi.ebay.com/_W0QQitemZ300238613788

CTC113 - Remote Radiated EMI Sensor with 6’ RF Cable

Is this only good for specific Lab Testing Applications ?
http://www.cleandreams.com/BTC-2000.htm

Or are there some real world general uses for the Radio Listener ?

i want to know -cause- iane ~ RHF