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通常使用(yong)(yong)的(de)濕(shi)式水(shui)(shui)表(biao)(biao)指(zhi)針(zhen)和(he)度(du)盤(pan)同樣是濕(shi)在(zai)水(shui)(shui)中(zhong)的(de),用(yong)(yong)水(shui)(shui)時會(hui)有(you)管(guan)道(dao)中(zhong)的(de)銹蝕(shi)水(shui)(shui)質進入到表(biao)(biao)盤(pan)和(he)表(biao)(biao)玻璃間(jian)隔中(zhong)。由(you)于這部(bu)分(fen)水(shui)(shui)的(de)流動(dong)性較差,水(shui)(shui)表(biao)(biao)使用(yong)(yong)時間(jian)久(jiu)了就會(hui)在(zai)表(biao)(biao)盤(pan)面上(shang)形成發黃的(de)沉淀,最終會(hui)導致無法讀取數字。