We currently do not offer a new MIT2020 Transmitter. We do offer repair and calibration services for this unit.
The "Plus" system was replaced in 2007. The purpose was to bring the PLC format to the Allen Bradley compact logix format. This allows Ethernet conductivity to the system for remote diagnostics and integration to other systems in your plant.
The "Classic" system was replaced in 2000. The purpose was to bring the PLC format to Pugmaster System. This allowed additional additives to be added to the mixture proportional to the feed rate. Historical data collection was a big "PLUS" also.