Yeah, sorry for not being clear enough. This area's still new to me.
I just meant something able to show the strength of RF waves in the UHF band within close proximity.
Like, for example, if a cell phone was in use 10' away the meter/detector could show the waves strength increasing (?) as the meter was brought closer and closer to the cell phone. Also, it needs to be able to work even if the RF waves are only present briefly.
If this doesn't even make sense plz point me in the right direction or feel free to school my n00b ass.
And if it finds ghosts that's also a plus.