electro-chemical measuring apparatus and equipment, namely, electrodes, test tubes, downloadable software for reading and analyzing the electro-chemical data, all sold as a unit; electronic devices for measuring electric current; non-medical measuring instruments, namely, calipers, verniers, scales for measuring the outer diameter of a rod, measuring the weight and mass of liquids; precision measuring instruments, namely, micrometers, laser distance meters, for measuring the thickness or diam...