From the antenna point of view, there are roughly three types of guided wave radar level meter, i.e. rod type guided wave radar level meter, cable type guided wave radar level meter, and coaxial tube type guided wave radar level meter. Today, we will take a look at the coaxial tube type guided wave radar level meter.
The antenna of the coaxial tube type guided wave radar level meter is mainly composed of two parts, namely a metal circular tube and a metal rod. In order to prevent the metal rod from touching the inner wall of the metal circular tube and causing interference, the metal rod is fixed inside the metal circular tube. In addition, the metal round tube is distributed with circular holes for the inflow of the liquid medium in the storage tank.
The radar waves emitted by the coaxial tube type guided wave radar level meter, propagating in the space inside the metal circular tube, are more concentrated in energy, with a stronger effective echo signal and more accurate measurement. Therefore, this type of measurement is more suitable for the measurement of liquid levels with low dielectric constants. Many deoxygenated and non-ionized water levels are measured with this measurement method in mind first.
In addition, the special antenna structure of the coaxial tube type guided wave radar level meter has a strong anti-interference capability and is not easily affected by external influences. For some special working conditions, this measurement method is more effective.
Once again, the coaxial tube type guided wave radar level meter can be completed in a small space to complete measurement, but also in a high temperature and high-pressure environment to complete measurement, so this measurement method is more adaptable to the environment.
Finally, it is well documented that coaxial tubular guided wave radar level meters can be used to measure the height of different liquid partition interfaces. The liquids are different and have different dielectric constants. The radar level meter emits a radar wave that encounters the interface and reflects the signal, thus in theory it can be used to measure the position of different liquid interfaces.
The above is a description of the antenna structure and the advantages of the coaxial tube-guided wave radar level meter. From there, it can be seen that this type of measurement is more concentrated in energy, has less interference, and is more accurate than other guided wave radar level meters.