Working principle of radio frequency admittance level meter
The working principle of the radio frequency admittance level meter is based on radio frequency (RF) capacitor technology< Br/>
Apply radio frequency to the probe and determine the impact of the surrounding environment through continuous analysis. Because all materials have a dielectric constant and their conductivity is different from air, the total impedance reflected by the small capacitance offset will change when the probe comes into contact with the material. Due to the fact that the energized probe and the container wall form the two plates of the capacitor, the insulation of the probe and the surrounding air become dielectric materials. When air (with a dielectric constant of 1.0) is replaced by any other material (dielectric constant> 1), the capacitance effect is enhanced. Therefore, the impedance of the application has changed. That is to say, changes in capacitance value lead to changes in impedance. This effect is measured by the circuit and then compared with the reference frame established by the sensitivity setting (circuit). The correct setting of the sensitivity of the RF admittance level switch will affect the correct changes in the sensor output. The Nul1 KoTeTM circuit of the probe allows the measurement circuit to ignore material accumulation

Otherwise, it may cause sensitivity failure of the probe. The circuit is excited using the same RF potential as the RF potential applied to the sensing probe. Due to the inability of current to flow at the same potential, the circuit isolates the current that typically flows from the energized probe through the stacked material to the container wall. Measure the material around the energized probe in this way, rather than the stacked material< Br/>








Design characteristics of RF admittance level switches
1. Widely used: can be used for various conductive and non-conductive media, such as liquids, viscous materials, particles, powders, and fly ash< Br/>
2. Anti adhesion: The patented anti adhesion circuit eliminates false signals caused by material adhesion< Br/>
3. Detachable probe: There is no cable connection between the controller and the probe, so the controller can be disassembled and replaced at any time without affecting feeding or discharging< Br/>
4. High and low temperature resistance: suitable for working environments between -184 ℃ and 280 ℃, and can also provide ceramic probes at higher temperatures< Br/>
5. Output form: Double pole double throw relay signal output, with status lights displaying output status and a delay function of 0 to 30 seconds< Br/>
6. Non intelligent diagnosis: After power on, the instrument circuit automatically detects whether the working status is normal< Br/>






Application fields of RF admittance level switches

1. Casting machinery: detecting sand level< Br/>
2. Environmental water treatment: Detecting the water level of sewage< Br/>
3. Hydraulic machinery: detecting lubrication conditions

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