admittance RF level switch / capacitive / for solids and liquids / threaded

The Admittance level switch adds a guard section between the active section and the grounding section to block the admittance current to reach the vessel wall from the medium between the active section and grounded electrode. Although there would be a small amount of admittance current between the guard section and the active section, the circuit would not take this current value into account. Due to the guard section, only the admittance current change between the active section and the tank wall will be detected by the circuit, thus only when the sensing probe is in contact with the medium will there be a precise signal.