The RF admittance level instrument is developed from the capacitive level measurement technology. It is a level control detection instrument with anti-hanging material, more reliable, more accurate and wider applicability. RF admittance is a combination of resistive, capacitive, and inductive components.

RF admittance level control technology is to achieve level measurement by measuring the admittance of the measured medium with high frequency radio waves. The difference between RF admittance technology and capacitive technology lies in the diversity of measurement quantity and three-electrode technology. A shield electrode is added between the measurement electrode and the ground electrode to protect the halo electrode from the influence of the hanging material, and the measurement is more stable, accurate and reliable.