Provides a physical system on which students can gain experience in the programming of programmable logic controllers (PLCs). The process is a model of a two-tank system typical of a chemical process in which liquids are measured before being mixed. The task for the student is to control liquid level and flow. For use with the PLC Trainer (CE123).

A fully integrated and self-contained bench top process control apparatus containing valves, pumps, power supplies and ancillaries to allow flow, level, temperature and pressure control strategies to be investigated individually and in combinations.