9 Anodes, cathodes, rectifiers, electrical power supplies, test stations, computer terminal boxes, probes, electrical meters, recorders, reference cells, electrodes, measuring cells, ground cells, electrical connectors, electrical cable clamps, analytical meters and instruments, namely, ammeters, voltmeters, resistance meters and potential meters; shunts, and current interrupters; electronic pipe, cable and underground and submerged metal locators; electrical conductors, cabling and wires; wire and cable splicing kits comprised of molds, resins, sealing tape, sleeves, strips and brazing and welding compounds; solar power supplies, ionic and electronic conductive electrolytes and backfills; voltage surge protectors; gas sensors; reels for electric wire; computer work stations comprising ultrasonic scanning instruments, transducers, video displays and recorders, transmitters, receivers, sensors, monitors, remote monitors and data collectors; probe interface modules; and complete cathodic protection installations comprised of anodes, cathodes, power supplies, cells, monitors, test stations, recorders, probes and computers