Capacitance Level Indicator

Principle
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.

Features
• Suitable for high temperature, high pressure and corrosive environment.
• Not affected by noisy, dusty, misty and changes In the temperature.
• No blind distance, ideal for different tanks.
• Economical for large tanks.
• 4-2OmA output compatible for most control systems and meters.