Case study:
The image shows a water cooling system to cool the "liquid product" in the pipe. Liquid products with a temperature of 200°C will be reduced to 100°C with water circulation. The Water Tank has a height of 10 meters with an inflow of 1000 liters per minute (LPM). So that the water in the tank does not spill, the level is maintained by controlling the incoming flow to be the same as the outgoing flow.

 Question:
(a) What instruments are needed in the process control system above!
(b) Draw the process control block diagram from the figure above based on the instruments mentioned in point (a)!

Liquid Product in water flow in water flow out Liquid Product out