Radar level gauge: cannot it detect anything below the probe?
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There is a 300mm distance from the bottom of the waveguide to the bottom of the tank; could this be a blind area that cannot be measured? I’m not sure if it’s a problem with my setup, but according to the instructions, it seems that it can only measure the liquid level in the probe section.
The change in liquid level starts from the bottom of the guide wave tube; there is no change in the area below it.
The guided wave radar has blind zones at its top and bottom, respectively. Generally, it is not necessary to measure below the bottom of the guide rod, as there may be residual liquid at the bottom of the container.
Original poster, if it’s a rod-type guided wave radar, it’s not possible to detect anything below the rod, as the radar waves travel along the guide rod. If it’s a malfunctioning radar, the parameters can be readjusted and calibrated to detect it. OP, I guess your device is a rod-type guided wave radar, so it won’t be able to detect it.
It is not possible to conduct real-time measurements below the guided wave radar probe; if measurement is necessary, virtual compensation can be applied once the distance below the probe is known