In most production or process settings level measurement is a crucial measurement. There are many tanks that store liquids that are used in multiple stages of production. There are many ways in which liquid level can be measured: hydrostatic, ultrasonic or radar are foremost methods.
The hydrostatic method uses a pressure based calculation to find the level and thus volume and mass as needed. Ultrasonic level measurement and radar level measurement use the principles or reflection to measure the level of liquid in a tank. These methods can be used for both open and closed tanks with modifications as necessary.