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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>工業(yè)在線(xiàn)ph計選型指南</span></p> </div>   <div id="8akqgto" class="ly_NyNewsdetail"> <h1 class="NyNewsdetail_title">工業(yè)在線(xiàn)ph計選型指南</h1> <div id="mdtpyij" class="NyNewsdetail_tips">更新時(shí)間：2016-04-01 點(diǎn)擊次數：3760</div> <div id="w8lak4o" class="NyNewsdetail_con"> <div><span style="font-size: 10.5pt">工業(yè)在線(xiàn)ph測控系統由四部分組成：變送器，感測電極，信號線(xiàn)纜，電極安裝保護裝置等。以下僅以中國臺灣上泰工業(yè)在線(xiàn)ph計選型為例進(jìn)行說(shuō)明。</span></div><div><span style="font-size: 10.5pt">ph變送器也成ph表頭或ph控制器，是接受電極信號并做一顯示，將感測型號進(jìn)行輸出控制。工業(yè)在線(xiàn)ph計表頭選型主要考慮：安裝方式，顯示幕，自動(dòng)清洗功能，溶液接地功能，數位輸出，模擬信號輸出，繼電器輸出，安裝方式，防護等級等幾個(gè)因素。</span></div><div><span style="font-size: 10.5pt">一般的工業(yè)污水ph計選型，這種考慮輸出控制，繼電器輸出，防護等級以及安裝方式幾個(gè)因素。一般而言多采用盤(pán)面安裝，在沒(méi)有控制柜的情況下一般采用墻裝貨管裝。繼電器輸出是ph自動(dòng)控制計量泵等泵浦的重要要素，根據實(shí)際控制泵浦的數量多少選擇單個(gè)高低點(diǎn)控制的ph計或雙高低點(diǎn)控制的ph計。防護等級一般要求IP65防護。</span></div><div><span style="font-size: 10.5pt">ph感測電極又叫PH電極或ph傳感器等多種叫法。ph電極的選擇對整個(gè)測控系統的正常進(jìn)行具有舉足輕重的重要，一般應考慮五大因素：耐溫，耐壓，耐介質(zhì)反滲，耐污染，耐特殊物質(zhì)。</span></div><div><span style="font-size: 10.5pt">工業(yè)在線(xiàn)ph計傳感器的耐溫要求，普通耐溫為80℃，中等耐溫為80-110℃，耐滅菌高溫可達130℃，一般溫度不能在零度以下。</span></div><div><span style="font-size: 10.5pt">工業(yè)在線(xiàn)ph計傳感器的耐壓要求。普通耐壓為即為常壓，中等耐壓會(huì )到5bar，高強耐壓可以到的15bar甚至更高的壓力。</span></div><div><span style="font-size: 10.5pt">工業(yè)在線(xiàn)ph計傳感器的耐污染主要是指污染ph電極的參考滲出界面，通常環(huán)形滲出界面、無(wú)液接界面的電極污染能力強于陶瓷滲出界面。電極的感應薄膜面積的大小與污染程度有關(guān)，面積越大耐污染能力越強。</span></div><div><span style="font-size: 10.5pt">工業(yè)在線(xiàn)ph計傳感器的耐介質(zhì)反滲主要是指，有些化學(xué)物質(zhì)反滲到參比系統，會(huì )造成凝膠水解，Ag/AgCl參比元中毒等現象，如H2O2，NH4，二價(jià)銅離子，三價(jià)鐵離子，強酸等。因此，對于這個(gè)物質(zhì)ph的測控要進(jìn)行對電極預加壓、延長(cháng)參比元與界面的距離或增設第二界面即為雙鹽橋。</span></div><div><span style="font-size: 10.5pt">工業(yè)在線(xiàn)ph計傳感器的耐特殊物質(zhì)，主要是指氫氟酸對ph電極本體的腐蝕，可以用銻電極來(lái)代替。</span></div><div><span style="font-size: 10.5pt">ph電極安裝護套主要是對ph電極進(jìn)行保護并適合不同的測控環(huán)境，主要應用的有沉入式安裝，管路安裝，頂插式安裝。</span></div><div><span style="font-size: 10.5pt">ph信號線(xiàn)一般采用ph信號線(xiàn)即可，一般不建議超過(guò)80米，超過(guò)80米時(shí)應加裝信號放大器，zui長(cháng)不得超過(guò)200米。</span></div> </div> <div id="9nd4jz9" class="ly_PrevNext"> <ul> <li>上一篇：<a href="/Article-927037.html">工業(yè)在線(xiàn)ph計保養及清洗方法</a></li> <li>下一篇：<a href="/Article-921879.html">影響工業(yè)在線(xiàn)ph計電極壽命的因素</a></li> </ul> </div> </div>   <div id="9iitzpv" class="ly_foot"> <div id="mdyjjpq" class="ly_Ftmain"> <div id="a3hwmxi" class="ly_FtLeft"> <div id="ofv83pa" class="Ft_nav"><a href="/">首頁(yè)</a><a href="/aboutus.html" target="_blank">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">榮譽(yù)資質(zhì)</a></div> <div id="38vlm4h" class="Ft_contact"> <div id="ac95src" class="Ftcont_tit">聯(lián)系方式<em></em></div> 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