Level Control – Controlling the Level of Liquid to Avoid Drying Up or Spilling Over

Are you trying to fill a bottle or a glass with water? The main aspect you would focus on is to fill the bottle or the glass with its desired contents of water, and second, to avoid over-filling—that is, to avoid spill-over while filling. You need to manually ensure that the liquid in the bottle or the glass does not spill over via visual inspection. In addition, what if someone needs a refill? You would need to ensure that as soon as the glass becomes empty, it is refilled without spilling over. Well, all these activities are manual and occur at a relatively low speed. Similar requirements exist in industry as well, and this brings us to the important control challenge of level control, which is important in many industries.

Controlling the fluid level in a tank is an essential element in various industrial applications. There is a parallel in our day-to-day lives with the overhead...