Superior high frequency (480 kHz) performance. The Pipehorn 800-H is the best tool in the industry when direct connection is not possible, and on the toughest conductors: coated iron pipes with insulated joints, unenergized power (street/parking lot lights), worn-out tracer tape & wire, short side services & stub-outs, concentric neutrals, and fiber. Nothing sweeps areas for un-marked utilities like a Pipehorn.

Pipehorn 800-H Product Page:

https://pipehorn.com/product/800h-pipe-and-cable-locator/ 

Pipehorn 800-H Manual:

https://pipehorn.com/wp-content/uploads/2018/04/800-high-frequency_manual.pdf