Buried metal locating instruments

Apart from the instruments described in previous paragraphs, there are others that, while not directly connected with cathodic protection as such, are extremely useful tools to a corrosion engineer. They include pH meters. Redox probes, protective-coating test instruments and buried-metal-location instruments. 

The athletic field was surveyed but interference from the television tower presented difficulties. The amount of fill over this pit (10-12 ft from the cut and fill maps), together with the description of the pit as deep in the 1921 Courier story, suggest that the current instruments would not be able to locate it. Finally, the explosives may have been buried in bulk, not shells. Wooden barrels have little signature for a metal detector. 

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