Capacitance Level Meter Capacitor Effect (II)

The relationship between liquid height and capacitance can be written based on the formula for concentric cylindrical capacitors:

1 distance between each electrode surface

2 the size of each electrode surface

3 The dielectric constant of the dielectric between the electrode surfaces

Since Co, ε, and D/d are often fixed, so: C = KH, that is, the capacitance is only proportional to the height of the liquid immersed probe (the opposing area of the capacitor plate).