The Intelligent Interface Unit is designed for use on small to medium size Microcor and E-9020 Corrater online systems for easy integration into existing SCADA and DCS systems. The IIU is normally supplied as part of a complete corrosion management system fully factory tested and configured for your application. computation of corrosion rate from the metal loss made by the Microcor transmitters, since these calculations are too complex for most SCADA and DCS systems to achieve without custom programming. Output from the IIU to the SCADA or DCS system is available in engineering units over Modbus serial port or via OPC over the Network. For Microcor transmitters the available outputs are metal loss, standard computed corrosion rate, diurnal filtered corrosion rate in metric or imperial units, and transmitter status. For Corrater E-9020 the available outputs are instantaneous corrosion rate, pitting tendency (or imbalance) in metric or imperial units, and transmitter status.