The radio frequency admittance level switch has been selected by the majority of manufacturers because it is not affected by the density of the medium and has high temperature resistance. Currently, it is considered to be the most versatile and cost-effective solid type material level detection product. The working principle of the RF admittance level switch is to detect the material level by sensing the change of the reactance (capacitance and impedance) between the sensor and the tank body.
The structure of the RF admittance level switch probe is based on the mutual lamination of layers of insulating material and metal probe. The middle metal layer of the probe is called a guard pole. The role of the protective pole in the application is mainly used for anti-hanging, that is, when there is material adhered to the probe, the protection pole can isolate the signal so that the hanging signal will not affect the normal detection signal. Accurately recognizing the role of the radio frequency admittance level switch protection pole can effectively avoid false alarms caused by hanging materials and increase the reliability of measurement.
In order to ensure better anti-adhesion of the meter, during installation and use, not only must the RF-admittance level switch be tilted down by about 20° after installation, but it should be noted that the size of the protection pole of the probe inserted into the bin should be greater than 50mm.
Counted as the RF admittance level switch of Automation, currently there are general-purpose, protective, cable-type, and ultra-high temperature RF admittance level switches. The above four types of RF admittance level switches are all designed to protect pole. When the installation is counted as a radio frequency admittance level switch, it is also required to follow the downward inclination of 20° and the size of the protection pole of the probe inserted into the bunker satisfies the requirements of more than 50mm to ensure that the instrument has better anti-adhesion. As shown below:
The above is the related introduction of "the role of radio frequency admittance level switch protection pole". For more information on level switch (level switch, level switch), level gauge (level gauge, level gauge), etc. For information on measuring instruments, please pay attention to WeChat public number: Jiweimeter. (The article is taken from:, please indicate the source.)
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