There is only air(Minimum relative permittivity ≒ 1) between the electrode and the tank wall.
So the capacitance is very small.
When liquid or powder enters the tank, the dielectric constant between the electrode and the tank wall increases and the capacitance also increases.
This product captures the increase in capacitance and outputs it as a contact signal.
We have sensors that are resistant to high temperatures, corrosivity, and vibration, as well as electrodes that are free of protrusions.
Product what was used Level-meter LT