The Analog Expansion Console enables monitoring of multiple bins equipped with sensors from a single C-100 Control Console, offering the benefits of significantly reducing the amount of equipment needed to monitor multiple bins, simplifying installation, and reducing overall equipment and wiring costs. The unit is designed to reliably measure the level of resins, powders, granules, pellets, and dry bulk solids as well as liquids in all types of bins, tanks and silos. The C-50 Analog Expansion Console provides convenient networked communications by interfacing with the C-100 Control Console to provide multiple 4-20mA outputs and centralizing all analog outputs to a single centralized location. The C-50 connects to the C-100 via a dedicated RS-485 cable; the C-100 is connected via a daisy chained RS-485 network to monitor data from 1 up to 120 SmartBob2 or SmartBob-TS1 sensors. The SmartBob inventory management system can be applied as an automated wired or wireless inventory monitoring and reporting solution for the plastics industry.