DESCRIPTION :- The setup studies behaviour of single tank system. It consists of supply tank, pump for water circulation, Rotameter for flow measurement, one process tanks with scale. The components are assembled on frame to form tabletop models. EXPERIMENTATION :- To obtain the step response of a single tank liquid level system to a step change in input flow and compare it with the theoretical response. To determine the time constant of the system from the step response curve and compare it with the theoretical value.