Trace and determine the depth of buried wires and metallic pipes with the 501 Tracker II Cable Locator from Tempo Communications The 501 Tracker II underground wire locator offers three methods of connection to fit every location job. Direct connection for maximum signal, inductive coupling for “live" cable, and an internal inductive antenna for underground location of buried and inaccessible cables. The lightweight receiver provides both audible and visual indications of signal strength for accurate identification.