INDUSTRIAL AND MUNICIPAL FLUID FLOW MEASURING AND CONTROL EQUIPMENT AND SYSTEMS - NAMELY, PUMP AND VALVE CONTROLLERS; FLUID PRESSURE, FLOW AND LEVEL SENSORS; RELAY ASSEMBLIES; SIGNAL TRANSMITTERS, TELEMETRY AND RECEIVERS; FLOW CONTROLLERS AND PROGRAMMERS; FLOW ALARMS; RECORDERS; INDICATORS; FLOWMETERS; TIMERS; TOTALIZERS; PLANT AND PROCESS CONTROL AND SAMPLING SYSTEMS; AND ANALYTICAL, RECORDING AND INDICATING INSTRUMENTS AND APPARATUS - NAMELY, MICROCOULOMETERS, GAS CHROMATOGRAPHS, POWER CONTROL UNITS, TITRATION CELLS, SAMPLE INLET/COMBUSTION UNITS, ELECTRODE PLATING UNITS, LABORATORY GLASSWARE, GAS DETECTORS, TEMPERATURE CONTROLLERS, AND ELECTROMETERS; AND PARTS THEREOF