Capacitance Level Transmitter

The principle of capacitive level measurement is based on change of capacitance. An insulated electrode acts as one plate of capacitor and the tank wall (or reference electrode in a non-metallic vessel) acts as the other plate. The capacitance depends on the fluid level. An empty tank has a lower capacitance while a filled tank has a A simple capacitor consists of two electrode plate separated by a small thickness of an insulator such as solid,

liquid, gas, or vacuum. This insulator is also called as dielectric.higher capacitance. Value of C depends on dielectric used, area of the plate and also distance between the plates.