I have a Tempo 508s. Had it for years, gets used once every few years. Used it last week to figure out the pathway of a non working security camera that was a long ways away from the main house and 18" down in conduit.

Was able to follow the wire from the camera.....all the way to the point where the wire broke... Under a decent sized tree that was a sapling 15 years ago when the wire was run (not by me).

Oops.