Electronic retail store services via a global computer information network featuring control and sensors, gauges, pressure seals, current converters, connectors, flow orifice assemblies, tank gauges, flow tubes, flow simulators, thermocouples, thermowells, dewpoint measuring systems, temperature detectors, hand held terminals, electrochemical analyzers, conductivity measurements, sensors, strip chart recorders, electronic indicating recorders, circular chart recorders, digital indicators, pos...