Radar level gauges cannot measure the oil beneath the floating roof in internal floating roof storage tanks
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Our facility has internal floating roof storage tanks, but the radar level gauge cannot measure the oil level below the floating disk. Why is that?
Only the position of the floating platform can be detected, as the radar waves are blocked by it.
The height of the floating disk can be regarded as the liquid level
Only the position of the floating pad can be detected. Check the installation; it’s possible that the radar waves are being blocked by the floating pad.
Ah! Radar must be measuring the position of the floating platform! Why is it called a floating pad? It’s the plate that floats on top of the oil! If it’s possible to determine the location of the oil, that would be troublesome! ! ! !
A wave guide should be installed inside the storage tank, with the radar gauge mounted on this wave guide; in this way, the radar can measure the liquid level beneath the floating disk.
Radar level gauges are designed to measure using radar reflection waves; a guide wave tube is required to allow these waves to pass through the floating roof.