PROVIDING ON-LINE CATALOGUES IN THE FIELD OF EQUIPMENT FOR MEASURING, CONTROLLING, AND/OR REGULATING TEMPERATURE, HUMIDITY, PRESSURE, STRAIN, FORCE, FLOW, LEVEL, pH, LOAD, VIBRATION, ELECTRICAL RESISTANCE, AIR VELOCITY, AMPERAGE, FREQUENCY, VOLTAGE, ION CONCENTRATION, CONDUCTIVITY, AND ENVIRONMENTAL MONITORING, AND DATA ACQUISITION, DISPLAY, AND RETRIEVAL EQUIPMENT INTENDED FOR USE IN CONJUNCTION WITH ALL OF THE FOREGOING