D

DATA PROCESSING, DATA COMMUNICATION, DATA DISPLAY, AND DATA RECORDING EQUIPMENT, NAMELY, DIGITAL PANEL METERS, MINIATURE THERMAL PRINTERS, DATA LOGGERS, DATA ACQUISITION DEVICES, INPUT/OUTPUT EXPANSION BOARDS, CHANNEL EXPANSION BOARDS, ANALOG TO DIGITAL CONVERTERS, DIGITAL TO ANALOG CONVERTERS, POWER SUPPLIES, MULTIPLEXERS, SAMPLE AND HOLD DEVICES, SIGNAL CONDITIONERS, OPERATIONAL AMPLIFIERS, INSTRUMENTATION AMPLIFIERS, ISOLATION AMPLIFIERS, INVERTERS, FILTERS, VOLTAGE TO FREQUENCY CONVERTERS, FREQUENCY TO VOLTAGE CONVERTERS, VOLTMETERS, VOLTAGE CALIBRATORS, DC TO DC CONVERTERS AND TEMPERATURE SENSORS