RF Admittance Level Switch

Principle

The electrode rod of the RF admittance level switch is composed of a measuring electrode, a shielding electrode, and a grounding electrode. The three electrodes are isolated by insulating materials. When the material touches the measuring electrode, the admittance between the measuring electrode and the grounding electrode increases. Therefore, the level of the material can be determined by the change in admittance. The shielding electrode is placed between the measuring electrode and the grounding electrode, and its signal waveform is identical to the waveform of the measuring electrode, but the two are completely isolated Independently, it can suppress the admittance changes between the measuring electrode and the grounding electrode caused by material adhesion when the electrode rod itself experiences material adhesion, thus eliminating false alarms during material adhesion.