RF admittance level switch is a novel level measuring instrument, it uses reliable RF admittance technology, overcomes the shortcomings of capacitive level meter can not eliminate the influence of conductive hanging material, the instrument has reliable operation, can resist the influence of hanging material layer, is suitable for almost all industrial sites. The meter is also easy to install, maintenance-free, low price and other characteristics, so it is widely used in petroleum, chemical, metallurgy, medical, electric power, food, paper and other industrial fields.