Moisture can still affect sealed load cells through several pathways. The electrical cable entry point can allow moisture to travel along the wire strands into the load cell housing. Temperature changes create pressure differences that can force humid air through tiny gaps in seals. Additionally, some moisture can pass through rubber seals over time through molecular diffusion.

The strain gauge adhesive can absorb moisture even through protective coatings, causing the gauge to expand slightly and create measurement drift. This is why high-quality load cells use hermetic sealing with welded stainless steel construction rather than just rubber gaskets.

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