SCIENTIFIC, ANALYTICAL, TESTING, CALIBRATING AND PROCESS CONTROL INSTRUMENTS, NAMELY, MOISTURE METERS, HYGROMETERS NOT INCLUDING HOUSEHOLD TYPE HYGROMETERS, HUMIDITY METERS, STACK GAS ANALYZERS, CALORIMETERS, PRESSURE TESTING UNITS, LEVEL METERS, TEMPERATURE METERS, DISSOLVED OXYGEN METERS, PH-METERS, BIOCHEMICAL OXYGEN DEMAND MONITORS, TOXICITY METERS, SLUDGE ACTIVITY MONITORS, TITRATORS, ROBOTS, MOISTURE BALANCE UNITS, SPECTROPHOTOMETERS FOR USE IN RESEARCH LABORATORIES, QUALITY CONTROL LABORATORIES AND PROCESS CONTROL APPLICATIONS