Technology used in RF admittance level switch

RF admittance level gauge switch can be widely used in metallurgy, chemical, petroleum, electric power, food, paper, coal, building materials, medicine and other fields of material level, liquid level alarm and control, PLC and DCS distributed control system, PLC, Realize automatic control and automatic detection of the production process.
Through the use of RF admittance technology, the level of the RF admittance switch is designed to absorb the advanced technology and functions of similar foreign products.
Consisting of two parts, electronic circuits and probes, electronic circuits, detection circuits, output circuits, including high-frequency oscillator detectors by detecting the great and the case, and the container between them and the grounding, by the high-frequency oscillator Providing a stable RF voltage, in great detectors, when the material detects great touches, the output voltage is unbalanced, through the modem, the amplifier, and the drive relay action.
The so-called RF admittance, the admittance means the reciprocal of the electrical impedance, its elements are composed of resistors, capacitor components, sensing components, and radio frequency or high frequency radio spectrum, so it can be understood as RF admittance measurement admittance and high frequency radio wave.
The sensors of the instrument and the instrument and the measured medium fill the wall and form the admittance value, the level changes, the admittance value changes accordingly, and the circuit unit measures the admittance value into the signal output on the material level to realize the material level measurement.
The level probe is equivalent to a capacitor, it does not consume an energy emitter, pure capacitance (energy).
However, the hanging detector contains the equivalent circuit of the resistor, and the impedance of the hanging will consume energy. Therefore, the generator voltage and the output change cause the bridge to generate measurement errors.
A buffer amplifier is added between the oscillator and the bridge to supplement the energy, so it cannot be reduced by adding an oscillating voltage probe.
Under the test of conductive medium, the ground surface of the probe insulation covers the entire measured medium and the hanging area, so that the effective measurement capacitance extends to the top of the hanging.
Therefore, the hang has an error, the conductivity is strong, and the error is greater. But it is not completely conductive in any measurement.