Ventis Pro5無(wú)線氣體檢測(cè)儀和它的三種可燃?xì)鈧鞲衅?/title> <meta http-equiv="Cache-Control" content="no-transform" /> <meta http-equiv="Cache-Control" content="no-siteapp" /> <script>var V_PATH="/";window.onerror=function(){ return true; };</script> </head> <body> <h1><a href="http://byheeit.com/">午夜亚洲av中文字字幕乱码,一级日本大片免费观看,欧美牲交a欧美牲交一级aa,亚州熟妇视频无码</a></h1> <div style="position:fixed;left:-9000px;top:-9000px;"></div> <div id="pl_css_ganrao" style="display: none;"></div><div id="w2dhc" class="pl_css_ganrao" style="display: none;"><menu id="w2dhc"></menu><thead id="w2dhc"><font id="w2dhc"><legend id="w2dhc"></legend></font></thead><b id="w2dhc"><samp id="w2dhc"><delect id="w2dhc"><menuitem id="w2dhc"></menuitem></delect></samp></b><pre id="w2dhc"></pre><input id="w2dhc"><b id="w2dhc"><pre id="w2dhc"></pre></b></input><del id="w2dhc"><center id="w2dhc"><label id="w2dhc"><em id="w2dhc"></em></label></center></del><style id="w2dhc"><form id="w2dhc"><address id="w2dhc"><strike 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class="clear"></div> </div> <div id="lge7xfn" class="Nav w100"> <div id="pjzc3x3" class="Navlist w1000"> <ul> <li id="Top1"></li> </ul> <div id="cpfbljz" class="clear"></div> </div> <div id="ez8vf7a" class="clear"></div> </div> <div id="psrdf7l" class="clear"></div> </div> <div id="eo2myiq" class="blockindex h450"> <div id="ozybgp2" class="new9"> <div id="p8ae8fw" class="new91"> <h1>Ventis Pro5無(wú)線氣體檢測(cè)儀和它的三種可燃?xì)鈧鞲衅?/h1> 發(fā)布時(shí)間：2024-11-15 </div> <div id="c2uylnm" class="new92"> <div class="ivlwbab" id="contentt"></div> 之前我們寫過(guò)紅外可燃?xì)鈧鞲衅骱痛呋扇細(xì)鈧鞲衅鞯膮^(qū)別，參見《貴的一定好嗎？論可燃?xì)鈧鞲衅鞯倪x擇》。最近小編才發(fā)現(xiàn)我們的ventis pro5居然有3種可燃?xì)鈧鞲衅鞴┻x擇?？扇?xì)怏w類型多樣，應(yīng)用環(huán)境也很復(fù)雜，選擇一款正確的傳感器非常重要。看了本文你可能可以更精準(zhǔn)的選擇符合您需求的可燃?xì)鈧鞲衅鳎?br>ventis pro5可配置三種類型的可燃?xì)怏w傳感器：催化燃燒式傳感器甲烷（ch4 ir）紅外傳感器可燃?xì)怏w（lel ir）紅外傳感器<br>這些傳感器各具特色，分別適用于特定的應(yīng)用環(huán)境。有時(shí)選擇合適的傳感器和技術(shù)是一項(xiàng)具有挑戰(zhàn)性的任務(wù)。本文將對(duì)各項(xiàng)可燃?xì)怏w檢測(cè)技術(shù)進(jìn)行說(shuō)明，同時(shí)為您提供關(guān)于適當(dāng)傳感器選擇的信息和指南。<br>催化燃燒傳感器<br>簡(jiǎn)介和工作原理：<br>催化燃燒式傳感器是應(yīng)用較為廣泛的針對(duì)可燃?xì)怏w檢測(cè)的傳感器。這種傳感器的檢測(cè)元件纏繞成線圈的形狀，外部涂催化劑，確保其對(duì)可燃?xì)怏w有反應(yīng)；而另一個(gè)線圈則覆蓋陶瓷，對(duì)可燃?xì)怏w無(wú)反應(yīng)。選擇同樣電阻值的兩個(gè)線圈配對(duì)，形成傳感器的檢測(cè)珠和參考珠，并將檢測(cè)珠和參考珠連接至惠斯通電橋中，施加固定的電壓，將兩個(gè)珠加熱至非常高的溫度。如果有可燃?xì)怏w進(jìn)入傳感器，高溫的檢測(cè)珠會(huì)使可燃性氣體發(fā)生無(wú)焰燃燒，從而導(dǎo)致溫度進(jìn)一步提升；參考珠對(duì)于可燃?xì)怏w無(wú)反應(yīng)，所以其溫度不會(huì)改變。檢測(cè)珠溫度的提升，將導(dǎo)致電路失衡，最終電信號(hào)將被轉(zhuǎn)換為氣體濃度讀數(shù)顯示在儀器屏幕上。由于只有少量可燃?xì)膺M(jìn)入傳感器內(nèi)部發(fā)生無(wú)焰燃燒，傳感器又是采用防爆設(shè)計(jì)，所以催化燃燒傳感器不會(huì)引起爆炸或燃燒。<br>催化燃燒式傳感器的優(yōu)點(diǎn)和劣勢(shì)：<br>與其它所有傳感器一樣，催化燃燒式傳感器也有自身的優(yōu)勢(shì)和劣勢(shì)。 <br>催化燃燒式傳感器應(yīng)用廣泛，設(shè)計(jì)方案比較簡(jiǎn)單，是較為經(jīng)濟(jì)的可燃?xì)怏w傳感器，這是一項(xiàng)重要的優(yōu)勢(shì)。這類傳感器的另一項(xiàng)主要優(yōu)勢(shì)在于能夠燃燒可燃?xì)怏w，也就是說(shuō)，理論上講，這類傳感器可檢測(cè)所有可燃?xì)怏w。但是，在功耗和儀器運(yùn)行時(shí)間方面，這項(xiàng)巨大的優(yōu)勢(shì)也可能成為劣勢(shì)。如上所述，這種傳感器需要被加熱到一定溫度才能燃燒可燃?xì)怏w，所以功耗比其它類型的傳感器更高。氣體燃燒式傳感器的另一項(xiàng)劣勢(shì)在于，催化燃燒式傳感器在氧氣含量嚴(yán)重不足的環(huán)境中無(wú)法檢測(cè)可燃?xì)怏w，因?yàn)榭扇細(xì)怏w的燃燒需要氧氣。對(duì)于可能抑制或毒化檢測(cè)珠的物質(zhì)環(huán)境，催化燃燒式傳感器無(wú)法發(fā)揮氣體檢測(cè)功能，這是一個(gè)值得注意的問(wèn)題。抑制劑包括包含下列一種或多種成分的鹵代化合物：氟、氯、溴或碘。已經(jīng)暴露在抑制劑環(huán)境中的催化燃燒式傳感器，隨著時(shí)間的流逝，會(huì)部分恢復(fù)喪失檢測(cè)能力。含硫化合物（h2s和so2）、處于硫化狀態(tài)的含硅化合物和含鉛化合物都屬于毒化劑。已經(jīng)暴露在毒化劑環(huán)境中的催化燃燒式傳感器，無(wú)法恢復(fù)已經(jīng)喪失的檢測(cè)能力。<br>紅外傳感器<br>簡(jiǎn)介和工作原理：<br>在可燃?xì)怏w檢測(cè)領(lǐng)域，紅外傳感器是僅次于催化燃燒式傳感器的第二常見的檢測(cè)設(shè)備，而且應(yīng)用越來(lái)越廣泛。氣體進(jìn)入傳感器之后，暴露在紅外線光束環(huán)境中，傳感器通過(guò)光學(xué)檢測(cè)器測(cè)量可燃?xì)怏w吸收的特定波長(zhǎng)的光線強(qiáng)度。傳感器對(duì)光學(xué)檢測(cè)器的響應(yīng)信號(hào)進(jìn)行優(yōu)化，確定具體的氣體類型，通常是丙烷或甲烷。如果進(jìn)入傳感器的氣體濃度增加，吸收的光線強(qiáng)度會(huì)成比率增長(zhǎng)，從而提升檢測(cè)器的信號(hào)強(qiáng)度。然后傳感器將這些信號(hào)發(fā)送至微處理器，以便與零可燃?xì)怏w含量參考點(diǎn)進(jìn)行對(duì)比，從而生成可燃?xì)怏w（即丙烷或甲烷）的濃度數(shù)據(jù)。<br>紅外傳感器的優(yōu)點(diǎn)和劣勢(shì)：<br>與催化燃燒式傳感器類似，紅外傳感器也有自身的優(yōu)勢(shì)和劣勢(shì)。紅外可燃?xì)怏w傳感器能耗比較低，與催化燃燒式傳感器相比具有很大的優(yōu)勢(shì)。催化燃燒式可燃?xì)怏w傳感器是能耗較高的氣體傳感器，而紅外可燃?xì)怏w傳感器能耗較低。對(duì)于紅外傳感器來(lái)說(shuō)，充滿電之后的運(yùn)行時(shí)間增加，這是巨大的優(yōu)勢(shì)。紅外傳感器能夠在氧氣不足的環(huán)境中工作，適合用于惰性氣體吹掃的場(chǎng)合以及其它惰性氣體環(huán)境中的可燃?xì)怏w檢測(cè)，這是這種設(shè)備的另一項(xiàng)優(yōu)勢(shì)。紅外傳感器的第三項(xiàng)優(yōu)勢(shì)在于，它不會(huì)像催化燃燒式傳感器那樣因?yàn)槎净瘎┖鸵种苿┒軗p。當(dāng)然紅外傳感器也有劣勢(shì)。紅外傳感器對(duì)于氫氣、乙炔、丙稀晴、苯胺和二硫化碳等可燃?xì)怏w無(wú)反應(yīng)，這是紅外傳感器的劣勢(shì)。環(huán)境高濕度以及環(huán)境溫度和壓力變化對(duì)于紅外傳感器信號(hào)輸出的影響很大，這是紅外傳感器的另一個(gè)問(wèn)題。<br>紅外傳感器的差別<br>催化燃燒式傳感器具有固有線性響應(yīng)特性。也就是說(shuō)，儀器根據(jù)某種特定氣體的要求標(biāo)定以后，如果出現(xiàn)其它氣體，儀器讀數(shù)是線性的，而且有比較接近的標(biāo)定系數(shù)。紅外傳感器的性能與其不同。<br>ventis pro5設(shè)備包含兩個(gè)不同的用于檢測(cè)可燃?xì)怏w的紅外傳感器：<br>甲烷紅外傳感器（ch4 ir）和可燃?xì)怏w紅外傳感器（lel ir）。<br>甲烷紅外傳感器(ch4 ir)<br>對(duì)于甲烷之外的其它氣體，甲烷紅外傳感器的響應(yīng)非線性程度很大。例如，如果存在甲烷氣體，甲烷紅外傳感器可產(chǎn)生線性響應(yīng)，如果出現(xiàn)的是戊烷，讀數(shù)將高于實(shí)際lel數(shù)值。這種傳感器對(duì)于其它氣體會(huì)產(chǎn)生非線性響應(yīng)，所以無(wú)法像催化燃燒式傳感器那樣利用簡(jiǎn)單標(biāo)定系數(shù)修訂讀數(shù)。傳感器對(duì)于甲烷的整體敏感度很好，因此適合用于0至99%體積濃度甲烷的檢測(cè)。請(qǐng)參見以下圖示，其中展示了甲烷紅外傳感器對(duì)于其它相關(guān)氣體的非線性響應(yīng)特性。<br>下表所示為傳感器讀數(shù)2.5%vol時(shí)，各可燃?xì)怏w的實(shí)際濃度。<br>檢測(cè)的可燃?xì)怏w 儀器讀數(shù) <br>2.1%vol（78%lel）乙烯 2.5%vol（50%lel）甲烷 <br>1.2%vol（36%lel）乙醇 2.5%vol（50%lel）甲烷 <br>1.1%vol（55%lel）丙烯 2.5%vol（50%lel）甲烷 <br>0.7%vol（23%lel）乙烷 2.5%vol（50%lel）甲烷 <br>0.65%vol（31%lel）丙烷 2.5%vol（50%lel）甲烷 <br>0.6%vol（32%lel）丁烷 2.5%vol（50%lel）甲烷 <br>0.55%vol（39%lel）戊烷 2.5%vol（50%lel）甲烷<br>可以看到，大多數(shù)時(shí)候，檢測(cè)氣體的實(shí)際濃度低于儀器讀數(shù)。但是對(duì)于乙烯和丙烯來(lái)說(shuō)，情況相反。如果使用甲烷紅外傳感器檢測(cè)甲烷之外的其它氣體，必須了解環(huán)境中含有哪些可燃?xì)怏w，以及甲烷紅外傳感器對(duì)于特定氣體的響應(yīng)特性。<br>可燃?xì)怏w紅外傳感器（lel ir）<br>與甲烷紅外傳感器不同，如果可燃?xì)怏w紅外傳感器根據(jù)丙烷的要求進(jìn)行標(biāo)定，對(duì)于其他可燃?xì)怏w的響應(yīng)線性程度更高。圖中所示為可燃?xì)怏w紅外傳感器對(duì)于常見可燃?xì)怏w的響應(yīng)情況。<br>用丙烷對(duì)紅外傳感器進(jìn)行標(biāo)定，用戶可使用如下所示標(biāo)定系數(shù)計(jì)算檢測(cè)的可燃?xì)怏w的實(shí)際濃度。<br>采樣氣體標(biāo)定系數(shù)* <br>丁烷 0.97 <br>戊烷 0.89 <br>己烷 0.8 <br>乙醇 1.65 <br>乙烯 3.4 <br>丙烯 1.69 <br>乙烷 1.01 <br>環(huán)戊烷 1.62 <br>甲烷 3 <br>氯甲烷 0.966 <br>環(huán)氧乙烷 0.845 <br>甲醇 2.22 <br>甲苯 1.18 <br>異丙醇 1.43 <br>丙酮 3.28 <br>二甲苯 1.51 <br>乙酸乙酯 1.69 <br>二氯乙烷 8.57<br>*上述標(biāo)定系數(shù)只適用于體積比濃度不超過(guò)2.5%vol的氣體。不同傳感器的標(biāo)定系數(shù)也不相同，公差為+/-25%vol。<br>將上述標(biāo)定系數(shù)用于修訂儀器的氣體檢測(cè)讀數(shù)，用戶可將丙烷讀數(shù)換算為具體檢測(cè)氣體的濃度。這種傳感器的劣勢(shì)在于，傳感器對(duì)于某些氣體(例如甲烷、乙烯和二氯乙烷)的響應(yīng)性能有限。有關(guān)情況可參見上表，其中標(biāo)定系數(shù)不低于3。<br>哪一種傳感器適合我？<br>我們對(duì)不同傳感器技術(shù)的功能、優(yōu)勢(shì)和劣勢(shì)，以及ventis pro5中兩種紅外傳感器（ch4紅外傳感器和lel紅外傳感器）的差異進(jìn)行了說(shuō)明。下表可作為選擇適當(dāng)可燃?xì)怏w傳感器時(shí)的快速指南。<br>哪一種可燃?xì)怏w傳感器技術(shù)更適用：催化燃燒式傳感器還是紅外傳感器？<br>優(yōu)勢(shì)：催化燃燒傳感器優(yōu)勢(shì)：紅外傳感器 <br>•多種可燃?xì)怏w的作業(yè)環(huán)境，包括乙炔和氫氣 •比較長(zhǎng)的運(yùn)行時(shí)間是關(guān)鍵因素 <br>•傳感器需要耐受高濕度環(huán)境以及較大的溫度和壓力變化 •儀器需要在氧氣含量不足的作業(yè)環(huán)境中使用 <br> •傳感器需要暴露在包含大量催化珠毒化劑或抑制劑的作業(yè)環(huán)境中<br>哪一種紅外傳感器更適用：ch4紅外傳感器還是lel紅外傳感器？<br>優(yōu)勢(shì)：ch4紅外傳感器優(yōu)勢(shì)：lel紅外傳感器 <br>•只需要檢測(cè)天然氣，或只能夠接受%vol形式的甲烷讀數(shù) •需要檢測(cè)多種可燃?xì)怏w，能接受傳感器對(duì)于甲烷、乙烯和二氯乙烷的較低響應(yīng)程度 <br>•主要檢測(cè)甲烷或天然氣，但是環(huán)境中可能包含其它已知的可燃?xì)怏w •可確定檢測(cè)的氣體類型，而且有必要使用標(biāo)定系數(shù) <br> •需要% lel讀數(shù)，而不是% vol讀數(shù)<br>看到這里您應(yīng)該很清楚應(yīng)該選用哪款可燃?xì)怏w傳感器了吧！英思科ventis pro5的三款傳感器，必有一款適合您。如果還有疑問(wèn)歡迎向英思科咨詢。 <br> <div class="swdznd3" id="contentb"></div> </div> <div id="8jjmrh2" class="clearfix"></div> </div> <div>上一個(gè)：<a href="n1274744.htm">發(fā)生車禍后醫(yī)院的錢應(yīng)該由誰(shuí)先墊付</a><br /> 下一個(gè)：<a href="n1274742.htm">運(yùn)用ISO標(biāo)準(zhǔn)提升CRM應(yīng)用水平</a> <br /><br /> <a href="n1274444.htm">貿(mào)易通是什么</a><br /> <a href="n1274445.htm">中國(guó)SRRC認(rèn)證是什么認(rèn)證-附SRRC認(rèn)證辦理流程步驟</a><br /> <a 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