9 ANALYTICAL INSTRUMENTS, NAMELY, TOTAL CARBON ANALYZERS, TOTAL OXYGEN DEMAND ANALYZERS, WATER QUALITY ANALYZERS, PROGRAMMABLE STREAM SELECTORS, DISSOLVED OXYGEN ANALYZERS, PROCESS TITRATORS, PHOSPHATE ANALYZERS, MERCURY ANALYZERS, MOISTURE ANALYZERS, AND ALSO FOR ELECTROLYTIC APPARATUS EMPLOYING ONE OR MORE ION PERMEABLE DIAPHRAGMS; POWER SUPPLY, AND CONTROLS