Multi - Capacitor sensor algorithm for water level measurement

Abstract

The water level calculation technique is based on the capacitance measurement of a multi - capacitor sensor partially immersed into the liquid. Every capacitance can be expressed from the mathematical point of view in terms of liquid column height by the geometrical parameters of every capacitor formed. The formula takes into consideration all parasitical effects due to geometrical limitations. The level is calculated using two different algorithms and the compared with a industrial level sensor and a ruler. Finally, the capacitance - level formula is plotted for fastening the level “reading” procedure.