Explosion-proof magnetostrictive level gauges in mixing station storage tanks often fail due to process contamination, wiring problems, moisture ingress, or electronic drift. Typical symptoms include a frozen level reading, sudden zero or full-scale output, signal fluctuation, or frequent alarms. Before opening any enclosure, isolate the circuit, confirm area gas safety, follow permit-to-work rules, and use suitable tools. First check supply voltage, loop current, grounding, and terminal tightness. Inspect the float for coating, deformation, or sticking, and verify the probe tube is straight and clean. Moisture inside the explosion-proof housing can damage the electronics; inspect gaskets, cable glands, and seals. Mechanical vibration and tank agitation may loosen connections or misalign the float. Compare the gauge reading with a manual gauge and, if available, use HART diagnostics. Correct wiring faults, dry or replace damaged modules, clean compatible components, and recalibrate according to the manufacturer's instructions. Replace worn seals and damaged floats, and ensure all covers are tightened to maintain explosion protection. Regular inspection, surge protection, stable power, and compatible materials reduce recurrence. If the fault continues, remove the unit for bench testing and replace it with a certified equivalent. Safe, systematic troubleshooting protects personnel and keeps mixing station storage tank measurement reliable. Always document all findings and test results.