9 corrosion control instruments and cathodic protection testing instruments, namely data acquisition monitors and meters, potential meters, underground tank test kits comprised of a potential meter, copper sulfate electrode, test lead wire accompanying operations manual, wave form analyzers, post generators, current interrupters, wire measurers, copper sulfate electrodes, and parts therefor; soil boxes for measuring of electrical resistivity of a sample of soil, water or other electrolyte; computer-based data managers for a field use in cathodic protection and corrosion control industries and parts for all the foregoing