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1. The level gauge should be installed at the top of the storage tank to avoid contact with the moving parts inside the equipment; when the medium inside the equipment experiences severe fluctuations, the guided wave rod (probe) should be secured using a perforated protective tube. 2. When installing the level gauge on the external connection pipe of the equipment, the following requirements shall be met: a) The length of the wave-guiding rod (probe) shall include the upper and lower measurement dead zones, and its end shall be at least 50 mm below the center of the lower connection port of the connection pipe; b) For wave-guiding radar level gauges using a dual-rod probe, the diameter of the connection pipe shall be no less than 80 mm; for those using a single-rod probe, the diameter shall be no less than 50 mm. 3. When using a cable-probe guided-wave radar level gauge to measure high liquid levels, the cable probe should be straightened and fixed at the bottom of the equipment; in situations where the liquid surface fluctuates severely, a perforated protective tube should be used for fixation. 4. When the temperature of the medium being measured is high, it is advisable to install the transmitter separately. 5. The installation of guided-wave radar and capacitive level gauges shall also comply with the requirements of the manufacturer.