A smelting plant in Guangxi adopted a magnesium oxide wet flue gas desulfurization process, using magnesium oxide (MgO) as the raw material. After hydration, it forms magnesium hydroxide (Mg(OH)₂), which acts as the desulfurizing agent. In this system, the magnesium hydroxide storage tank is about 30 meters high, with the radar level transmitter installed approximately 7 meters from the base. The tank connects to a magnesium oxide combustion boiler, where spray nozzles near the wall introduce water. The tank operates under negative pressure, and the measured medium is boiling water. The installation surface is inclined, with a 400 mm mounting pipe that is slightly angled.

Previously, a domestic 26 GHz radar level transmitter was used, but the intense spray and foam in the tank caused significant signal interference, making accurate measurement impossible. After an on-site inspection, our engineers recommended an 80 GHz radar level transmitter for testing. The higher-frequency radar signal can penetrate foam and reach the liquid surface directly, while the false echo learning function effectively filters out interference caused by spray. Because the installation pipe was not perpendicular to the water surface, our engineers used a universal mounting structure to fine-tune the angle and locate the strongest radar signal reflection point before calibration.

After more than a month of continuous testing, the readings stayed closely aligned with the actual liquid level, showing less than 1 cm of error margin. The radar performed reliably earning strong feedback from the customer, and went on to place a large-scale purchase for continued cooperation.