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Basics of Capacitance Type Liquid Level Measurement

In this video discussed about capacitance type liquid level measurement technique. Level measurement is one of the important process variable that need to be measured and control. Level measurement is required for inventory management, custody transfer, storage efficiency, safety etc. Capacitance type level sensors are used for both conducting and non conducting liquid level measurement. Here is discussed capacitance of basic parallel plates and concentric cylinders. For non-conducting liquids the variation in dielectric constant of the measuring liquid causes increase or decrease in capacitance value. And for conducting liquids the overlapping length of concentric cylinders varies.