11-22-2017, 02:20 AM
Locating underground conductors requires an instrument like the Amprobe AT-3500 (>$2000). Wire tracers for exposed conductors like the Greenlee 200EP-G are <$100. Both are two part instruments, a signal injector and signal receiver. Both work great for their intended purpose. The Amprobe can locate deep underground conductors (specs say 16') and will read through reinforced concrete.