Radio frequency admittance admittance level controller

Abstract

This invention discloses a radio-frequency transadmittance level controller, which comprises a probe, a connecting head, and a casing. The radio-frequency transadmittance level controller is characterized in that the probe consists of a measuring pole and a protecting electrode, wherein the measuring pole is an elongated metal rod, the outside of the metal rod is partially provided with an insulating layer, and the protecting electrode is a metal sleeve, the outside of the sleeve is partially provided with the insulating layer and the measuring pole is sleeved in the protecting pole; a connector is of a hollow tubular shape, the inside of the connector is sleeved with the probe, and one end of the connector is in threaded connection with a shell; the inside of the shell is provided with a control member; and the measuring pole and the protecting electrode are respectively connected with the control member through conducting wires. With reasonable design and simple structure, the radio-frequency transadmittance level controller adopts the technology for measuring the radio-frequency transadmittance level to add an electrode (the protecting pole) on the probe to prevent the measuring pole from charging adhesive materials and statically releasing to the ground, thereby completely solving the problem of an error warning caused by coating of the probe, having correct measurement on liquids, slurries, granules or interfaces, high stability and convenient debugging, and needing no maintenance after installation.

Description

technical field [0001] The invention relates to a measuring and controlling instrument, in particular to a radio frequency admittance level controller. Background technique [0002] At present, the instruments used to measure the material level in the industry generally use capacitive level gauges, which use the change in the capacitance of the measured medium to measure the level of the material. Insert the metal probe into the container containing the material, the metal probe acts as one pole of the capacitor, and the container wall acts as the other pole of the capacitor. The medium between the two electrodes is the material and the gas above it. Since the dielectric constant ε1 of the material is different from the dielectric constant ε2 of the air above the material, for example: ε1>ε2, when the material rises, the total dielectric constant value between the two electrodes increases accordingly, thus increasing the capacitance. Conversely, when the material drops,...

AI Technical Summary

Problems solved by technology

With the improvement of industrial automation, the existing capacitive level gauges are obviously unable to meet the level measurement of various media, especially the level measurement of adhesive materials, powders and electrostatic materials.

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