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<p>電導(dǎo)率儀工作原理：電導(dǎo)率是以數(shù)字表示溶液傳導(dǎo)電流的能力。水的電導(dǎo)率與其所含無機(jī)酸、堿、鹽的量有一定的關(guān)系，當(dāng)它們的濃度較低時(shí)，電導(dǎo)率隨著濃度的變大而增加，因此，該指標(biāo)常用于推測水中離子的總濃度或含鹽量。</p><p>電導(dǎo)率是物體傳導(dǎo)電流的能力。</p><p>電導(dǎo)率測量儀的測量原理是將兩塊平行的ji板，放到被測溶液中，在ji板的兩端加上一定的電勢（通常為正弦波電壓），然后測量ji板間流過的電流。</p><p>根據(jù)歐姆定律，電導(dǎo)率（G）--電阻（R）的倒數(shù)，由導(dǎo)體本身決定的。</p><p>電導(dǎo)率的基本單位是西門子（S），原來被稱為歐姆。</p><p>因?yàn)殡妼?dǎo)池的幾何形狀影響電導(dǎo)率值，標(biāo)準(zhǔn)的測量中用單位電導(dǎo)率S/cm來表示，以補(bǔ)償各種傳感器尺寸造成的差別。</p><p>單位電導(dǎo)率（C）簡單的說是所測電導(dǎo)率（G）與電導(dǎo)池常數(shù)（L/A）的乘積。</p><p>這里的L為兩塊ji板之間的液柱長度，A為ji板的面積。</p><p>水的電導(dǎo)率與其所含無機(jī)酸、堿、鹽的量有一定關(guān)系。</p><p>當(dāng)它們的濃度較低時(shí)，電導(dǎo)率隨濃度的變大而增加，因此，該指標(biāo)常用于推測水中離子的總濃度或含鹽量。</p><p>不同類型的水有不同的電導(dǎo)率。</p><p>新鮮蒸餾水的電導(dǎo)率為0.2-2μS／cm,但放置一段時(shí)間后，因吸收了CO2,增加到2—4μS/cm；</p><p>超純水的電導(dǎo)率小于0.10/μS/cm；</p><p>天然水的電導(dǎo)率多在50—500μS/cm之間，礦化水可達(dá)500—1000μS/cm；</p><p>含酸、堿、鹽的工業(yè)廢水電導(dǎo)率往往超過10 000μS/cm；</p><p>海水的電導(dǎo)率約為30 000μS/cm.</p><p>傳感器常數(shù)常選用已知電導(dǎo)率的標(biāo)準(zhǔn)***溶液測定。</p><p>不同濃度***溶液的電導(dǎo)率（25℃）列于下表。</p><p>溶液的電導(dǎo)率與其溫度、傳感器上的ji化現(xiàn)象、傳感器分布電容等因素有關(guān)，儀器上一般都采用了補(bǔ)償或消除措施。</p><p>水樣采集后應(yīng)盡快測定，如含有粗大懸浮物質(zhì)、油和脂，干擾測定，應(yīng)過濾或萃取除去。 </p><p><br/></p> </div> <div id="3tzm5vv4jmr" class="ly_PrevNext"> <ul> <li>上一篇：<a href="/Article-3111924.html">關(guān)于COD測定儀的原理及功能介紹</a></li> <li>下一篇：<a href="/Article-3110667.html">在線PH計(jì)的產(chǎn)品性能特點(diǎn)介紹</a></li> </ul> </div> </div>   <div id="3tzm5vv4jmr" class="ly_foot"> <div id="3tzm5vv4jmr" class="ly_Ftmain"> <div id="3tzm5vv4jmr" class="ly_FtLeft"> <div id="3tzm5vv4jmr" class="Ft_nav"><a href="/">首頁</a><a href="/aboutus.html" target="_blank" rel="nofollow">關(guān)于我們</a><a href="/products.html" target="_blank">產(chǎn)品展示</a><a href="/news.html" target="_blank">新聞中心</a><a href="/article.html" target="_blank">技術(shù)文章</a><a href="/honor.html" target="_blank" rel="nofollow">榮譽(yù)資質(zhì)</a></div> <div id="3tzm5vv4jmr" 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