Whether the radar level meter can measure correctly depends on the signal of the reflected wave. If the liquid surface cannot reflect the electromagnetic wave back to the radar antenna at the chosen installation location or if there are interfering objects within the range of the signal wave reflecting the interfering wave to the radar level meter, the radar level meter will not be able to reflect the actual liquid level correctly.
Therefore, it is very important to choose the installation location reasonably for the radar level meter. The following points should be noted during installation:
(1) The axis of the radar level meter antenna should be perpendicular to the reflecting surface of the liquid level.
(2) If the stirring valve in the tank, the adhesion of the tank wall and the stairs are within the signal range of the radar level meter, they will generate interfering reflected waves and affect the liquid level measurement. When installing, choose a suitable installation location to avoid interference from these factors.
(3) The mouth of the horn-type radar level meter must exceed the inner surface of the mounting hole by a certain distance (>10mm). The antenna of the rod-type level meter must extend out of the mounting hole, and the length of the mounting hole cannot exceed 100mm. For circular or elliptical containers, it should be installed at a distance of 1/2R (R is the radius of the container) from the center, and should not be installed at the center of the top of the circular or elliptical container. Otherwise, the radar wave will converge at the center of the top of the container after multiple reflections on the container wall, forming a strong interference wave, which will affect accurate measurement.
(4) For liquid level measurement of containers with large liquid level fluctuations, a level meter with a bypass pipe can be used to reduce the impact of liquid level fluctuations.
Hangzhou Economic Development Area，Hangzhou 310018，China
