Capacitance Level Switches

Capacitance level indicator: Utilizes the capacitance formed between the sensing probe and the metallic vessel wall. A high frequency sine-wave is applied between the probe and the vessel wall.A change of the medium level will induce a change in the current of the applied sine-wave. From Z=Y2fc, when the capacitance in the vessel increase, Impedance will decrease and current will Increase. Vice-versa, when the capacitance in the vessel is small, the impedance will increase and current will decrease accordingly. Suitable for high temperature, high pressure and corrosive environment.