Radar level gauge installation precautions

April 05, 2024

When there are devices in the vessel that affect the measurement (such as: serpentine tubes, heat exchangers, stirrers, etc.) or the relative dielectric constant of the medium to be measured is small, it is often necessary to set the waveguide to increase the reflected echo energy to ensure the measurement. Accuracy. In the sulphuric acid production system, the liquid level of the melted sulphur tank is measured using a radar level gauge equipped with a waveguide waveguide antenna. This is mainly due to the fact that a stirrer is installed in the melted sulphur tank, and even if the eddy current is in a hurry after installation of the waveguide, it is not Will affect the measurement results. If the medium in the container keeps moving, the waveguide and the bottom of the container should be fixed. The long waveguide should be reinforced in the middle of the casing. The inner wall of the waveguide must be smooth. It is preferable to use a drawn or longitudinal welded stainless steel waveguide. When welding, the inner wall of the waveguide cannot produce bumps. If you do not weld thoroughly, be sure to remove the weld and the uneven place, otherwise it will cause a strong false echo. In the case of a low material level or a small dielectric constant of the measured medium, it is recommended to install a refraction plate at the bottom of the measuring tube to refract the reflected radar signal at the bottom of the container so as to ensure that the detected level of the medium is not a container. The bottom position.

Radar Level Gauge Installation Considerations a Radar level gauge should be installed away from the feed inlet, feed curtain, and whirlpool to avoid injecting liquids that may produce false returns that are much larger than the true echoes reflected by the measured liquid level. The wave, as well as the attenuation caused by the scattering of the vortex irregular liquid on the microwave signal.

b. The radar level gauge cannot be installed in the center of the tank top to avoid signal loss due to interference.

C. The distance between the outer wall of the installation pipe and the inner wall of the tank should be greater than 1/6 of the diameter of the tank.

d. It is recommended to install a protective cover to prevent sun and rain.

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