Anodes, cathodes, rectifiers, electrical power supplies, test stations comprising sensors for monitoring electrical current, computer terminals, electrical connectors, ammeters, voltmeters, shunts and current interrupters; electrical conductors, electrical cables and wires; voltage surge protectors; remote sensors for monitoring electrical currents; complete cathodic protection installations comprised of anodes, cathodes, power supplies, electric cells, sensors, test stations comprising sensors for monitoring electrical activity, electronic data recorders, probes, computers, dc/dc controller, mounting stand, storage batteries, and control panel; complete cathodic protection installations comprised of anodes, cathodes, solar or wind-powered electricity generators, electric cells, sensors, test stations comprising sensors for monitoring electrical activity, electronic data recorders, probes, computers, dc/dc controller, mounting stand, storage batteries, and control panel