FRFI RF Admittance Level Transmitter

FRFI series RF Admittance Level Transmitter consists of a sensor electronic unit that uses a capacitor formed by the medium between the electrode and the metal barrel wall. Then apply a high frequency signal in the electrode, the electrode will have a small current through the medium back to ground. As the level in the tank changes, the capacitance between the electrode and the tank wall also changes. The solid-state electronics of RF Admittance Level Transmitter continuously monitors this change, compares it to a very stable reference circuit, and outputs an accurate 4-20mA current signal proportional to the level.