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id="pn4ptef" class="clear"></div> </form> </div> <div id="n8zmsjf" class="clear"></div> </div> </div>  <script src="http://www.chem17.com/mystat.aspx?u=sanbon"></script>  <div id="peabstd" class="ly_crumb"> <img src="/skins/170979/images/crumb_icon.png" /><p>當前位置：<a href="/">首頁(yè)</a> > <a href="/article.html">技術(shù)文章</a> > <span>實(shí)驗室電導率儀電導電極的種類(lèi)劃分</span></p> </div>   <div id="8ppvqb9" class="ly_NyNewsdetail"> <h1 class="NyNewsdetail_title">實(shí)驗室電導率儀電導電極的種類(lèi)劃分</h1> <div id="pn3rnou" class="NyNewsdetail_tips">更新時(shí)間：2018-11-02 點(diǎn)擊次數：3195</div> <div id="jcs9hkf" class="NyNewsdetail_con"> 　　<strong>實(shí)驗室電導率儀</strong>是適用于精密測量各種液體介質(zhì)的儀器設備,主要用來(lái)精密測量液體介質(zhì)的電導率值,當配以相應常數的電極可以測量高純水電導率，廣泛應用各領(lǐng)域的科研和生產(chǎn)。電導率計是實(shí)驗室電導率測量?jì)x表，它除能測定一般液體的電導率外，且能滿(mǎn)足測量高純水的電導率的需要。儀器有0~10mV訊號輸出，可接自動(dòng)電子電位差計進(jìn)行連續記錄。<br /><br /><div>　　<strong>實(shí)驗室電導率儀</strong>的電導電極一般分為二電極式和多電極式兩種類(lèi)型。</div><div>　　1.二電極式電導電極。二電極式電導電極是目前國內使用zui多的電導電極類(lèi)型，實(shí)驗式二電極式電導電極的結構是將二片鉑片燒結在二平行玻璃片上，或圓形玻璃管的內壁上，調節鉑片的面積和距離，就可以制成不同常數值的電導電極。通常有K=1、K=5、K=10等類(lèi)型。而在線(xiàn)電導率儀上使用的二電極式電導電極常制成圓柱形對稱(chēng)的電極。當K=1時(shí)，常采用石墨，當K=0.1、0.01時(shí)，材料可以是不銹鋼或鈦合金。<br /> </div><div>　　2.多電極式電導電極。多電極式電導電極，一般在支持體上有幾個(gè)環(huán)狀的電極，通過(guò)環(huán)狀電極的串聯(lián)和并聯(lián)的不同組合，可以制成不同常數的電導電極。環(huán)狀電極的材料可以是石墨、不銹鋼、鈦合金和鉑金。<br /> </div><div>　　3.電導電極還有四電極類(lèi)型和電磁式類(lèi)型。四電極電導電極的優(yōu)點(diǎn)是可以避免電極極化帶來(lái)的測量誤差，在國外的實(shí)驗式和在線(xiàn)式電導率儀上較多使用。電磁式電導電極的特點(diǎn)是適宜于測量高電導率的溶液，一般用于工業(yè)電導率儀中，或利用其測量原理制成單組分的濃度計，如鹽酸濃度計、硝酸濃度計等。<br /> </div><div>　　值得說(shuō)明的是電導率儀屬儀器設備，對象是液體介質(zhì)，其作用為測量各種液體介質(zhì)，具有接自動(dòng)電子電位差計進(jìn)行連續記錄的特點(diǎn)，應注意電極的引線(xiàn)不能潮濕。</div> </div> <div id="hulrnoz" class="ly_PrevNext"> <ul> <li>上一篇：<a href="/Article-1690028.html">水中的ORP是什么?</a></li> <li>下一篇：<a href="/Article-1668762.html">氨氮分析儀維護時(shí)間表</a></li> </ul> </div> </div>   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