capacitive level switch / for liquids

Kotron® Model 80/81 RF Capacitance Level Switches offer the industrial user a choice of alarm and control configurations. Both integral and remote electronics are available.

Operating Principle

The amount of capacitance developed in any vessel is determined by the size (surface area) of the probe, the distance from the probe to its ground, and the dielectric of the medium being measured. Considering that the probe’s mounting position is fixed, and that the dielectric value of the medium is constant, then the amount of capacitance developed in any vessel becomes dependent upon the amount of the probe which is covered by the media.

As media rises and falls in the tank, the amount of capacitance developed between the sensing probe and the ground also rises and falls. This change in capacitance is measured in the electronics. When the capacitance measurement is the same as the setpoint, an alarm occurs.

Applications

Clean or dirty liquids
Viscous liquids
Light slurries
Corrosive liquids
High temperature/pressure liquids
Chemicals
Hydrocarbons and solvents
Acids and salts
Foods and beverages