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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="3ya2f2d" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/cdwckj/637064087737705079/5095940.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="fz2jgda" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>四川省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產品關鍵詞：</span>廣安氣體檢測儀器批發(fā),氣體檢測儀器</p><p><span>***更新：</span>2020-10-17 08:04:03</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="inhelnf" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">成都皖川科技有限公司</a></p><p><span>聯(lián)系人：</span>朱成生</p><p><span>郵箱: </span>cdwckjgs@sina.com</p><p><span>電話: </span>18755046999</p><p><span>傳真: </span>028_87463776</p><p><span>網址: </span></p><p><span>手機: </span>028-87463776</p><p><span>地址: </span>四川省成都市青羊區(qū)青羊萬達廣場SOHO公寓2-2-1138室</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="8jgtqnf" class="page-proshow02"><p class="title">詳細說明</p><div id="xro8g9k" class="box"><p><p style="text-indent:25px">在氣體檢測儀上我們經?？吹缴厦鏄俗⒌挠小癙PM”、“LEL”，那么什么是“PPM”、“LEL”呢，也許很多人都不是太清楚，廣安氣體檢測儀器批發(fā)，現(xiàn)在我們來詳細介紹這兩個詞的具體含義。 “PPM”是體積比濃度。“PPM”是溶液濃度的一種表示方法， PPM 表示百萬分之一。對于溶液：即1升水溶液中有1/1000毫升的溶質，則其濃度為1 PPM ，廣安氣體檢測儀器批發(fā)。對于氣體：對環(huán)境大氣中污染物濃度的表示方法之一。體積濃度表示法：一百萬體積的空氣中所含污染物的體積數(shù)，廣安氣體檢測儀器批發(fā)，即PPM ，大部分氣體檢測儀器測得的氣體濃度都是體積濃度（ PPM ），而按我國規(guī)定，特別是環(huán)保部門，則要求氣體濃度以質量濃度的單位表示，我們國家的標準規(guī)范也都是采用質量濃度單位表示。它是利用一些金屬氧化物半導體材料，在一定溫度下，電導率隨著環(huán)境氣體成份的變化而變化的原理制造的。廣安氣體檢測儀器批發(fā)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣安氣體檢測儀器批發(fā),氣體檢測儀器" src="http://tyunfile.71360.com/UploadFile/cdwckj/637064087737705079/5095940.jpg"></div><p style="text-indent:25px">雖然氣體檢測儀與氣體分析儀在原理上都是采用各類氣體傳感器來測量氣體濃度，且在石化、煤炭、冶金、化工、市政燃氣、環(huán)境監(jiān)測、鋼鐵、電力等多種場所均有廣泛應用。但在其功能、結構、檢測方式、檢測準確度、控制方式、操作方式、排干擾方式上卻大不相同，具體如下：氣體檢測儀是一種氣體泄露濃度檢測的儀器儀表工具，屬于安全防護儀器。氣體檢測儀結構較簡單，只包括氣體探頭(氣體傳感器)及傳感器信號轉換電路部分。氣體檢測儀利用探頭直接暴露在被測的空氣中或樣氣環(huán)境中進行檢測。廣安氣體檢測儀器批發(fā)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣安氣體檢測儀器批發(fā),氣體檢測儀器" src="http://tyunfile.71360.com/UploadFile/cdwckj/637064087738046875/7186463.jpg"></div><p style="text-indent:25px">氧氣作業(yè)：作業(yè)區(qū)域環(huán)境氧氣含量不得低于19.5%，有限空間內氧含量一般為 19.5%～21%，在富氧環(huán)境下不得大于23.5%。硫化氫作業(yè)：當硫化氫濃度低于40ppm時可以佩戴過濾式防毒面具作業(yè)，并在濾毒罐表面注明適用物質；　　當硫化氫濃度大于40ppm或濃度不明或二氧化硫濃度高于2ppm的區(qū)域內作業(yè)時應使用正壓式空氣呼吸器；　　嚴禁任何人不佩戴合適的防護用品進入可能含有硫化氫氣體的區(qū)域，禁止在有危險區(qū)域內摘除防毒用具。 6.如在作業(yè)中出現(xiàn)頭暈、耳鳴、眼花、惡心等情況時應立即停止作業(yè)，撤離到空氣清新區(qū)域（注意空氣流向，選擇上風口），如事態(tài)較大應立即啟動應急響應，開展自救、他救。</p><p style="text-indent:25px">氣體檢測儀器是一種氣體泄露濃度檢測的儀器儀表工具，主要是指便攜式/手持式氣體檢測儀器。主要利用氣體傳感器來檢測環(huán)境中存在的氣體種類，氣體傳感器是用來檢測氣體的成份和含量的傳感器。一般認為，氣體傳感器的定義是以檢測目標為分類基礎的首先步是將氣體探測器安裝在可能有氣體泄漏的區(qū)域中，氣體探測器安裝必須牢固，且安裝位置根據被測氣體相對于空氣比重大小決定，因被測氣體比重小于空氣，探測器應安裝在距頂棚30～60cm處。用Φ8膨脹螺絲將探測器固定在墻壁上。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣安氣體檢測儀器批發(fā),氣體檢測儀器" src="http://tyunfile.71360.com/UploadFile/cdwckj/637064087737402344/6678506.jpg"></div><p style="text-indent:25px">“LEL"是指下限?？扇細怏w在空氣中遇明火種的比較低濃度，稱為下限—簡稱%LEL。可燃氣體在空氣中遇明火種的比較高濃度，稱為上限—簡稱%UEL。那么什么是下限呢？可燃性氣體的濃度過低或過高它是沒有危險的，它只有與空氣混合形成混合氣或更確切地說遇到氧氣形成一定比例的混合氣才會發(fā)生燃燒或。有關**部門和**已經對目前發(fā)現(xiàn)的可燃氣作了燃燒分析，制定出了可燃性氣體的極限，低于下限，混合氣中的可燃氣的含量不足，不能引起燃燒或，高于上限混合氣中的氧氣的含量不足，也不能引起燃燒或。另外，可燃氣的燃燒與還與氣體的壓力、溫度、點火能量等因素有關。極限一般用體積百分比濃度表示。極限是下限、上限的總稱，可燃氣體在空氣中的濃度只有在下限、上限之間才會發(fā)生。低于下限或高于上限都不會發(fā)生。廣安氣體檢測儀器批發(fā)</p><p style="text-indent:25px">廣安氣體檢測儀器批發(fā)</p><p style="text-indent:25px">儀器儀表是用以檢出、測量、觀察、計算各種物理量、物質成分、物性參數(shù)等的器具或設備。真空檢漏儀、壓力表、測長儀、顯微鏡、乘法器等均屬于儀器儀表。近年來，得益于機械、冶金、石化行業(yè)等儀器儀表服務領域經營狀況的好轉，我國儀器儀表制造業(yè)發(fā)展一路向好。隨著互聯(lián)網的逐步發(fā)展，為耐磨熱電偶，氣體檢測儀器，便攜式氣體報警控制器，雙金屬溫度計等產品的傳播提供了一個飛速的平臺。讓儀器儀表行業(yè)從傳統(tǒng)的銷售模式到以互聯(lián)網電子商務為主的營銷方式的轉變，促進了儀器儀表行業(yè)與互聯(lián)網的結合，推動產業(yè)創(chuàng)新發(fā)展。在國民經濟運行中，研發(fā)、銷售計算機軟硬件;計算機系統(tǒng)集成;銷售電子產品、儀器儀表、電氣設備、機械設備、閥門、水泵、電線電纜、通訊器材(不含無線廣播電視發(fā)射及衛(wèi)星地面接收設備)、醫(yī)療器械(***一類)、實驗設備、化工產品(不含危險化學品)、五金交電、照明設備。等設備是提高勞動生產率的倍增器，對國民經濟有著巨大的作用和影響力。美國商業(yè)部地區(qū)技術和標準研究院（NIST）提出的報告稱：美國90年代儀器儀表工業(yè)產值只占工業(yè)總產值的4%，但它對國民經濟（GNP）的影響面卻達到66%。盡管在我國相關政策的引導和支持下，我國儀器儀表行業(yè)得到了飛速發(fā)展。但是從銷售整體上看，我國的儀器儀表行業(yè)還是落后于國際水平的。重點技術缺乏、高精尖產品嚴重依賴進口、儀器儀表產品同質化嚴重、生產工藝落后、研發(fā)能力弱、精度不高等問題的凸顯，為儀器儀表行業(yè)的發(fā)展帶來了嚴峻的挑戰(zhàn)。廣安氣體檢測儀器批發(fā)</p><p style="text-indent:25px">成都皖川科技有限公司是一家研發(fā)、銷售計算機軟硬件;計算機系統(tǒng)集成;銷售電子產品、儀器儀表、電氣設備、機械設備、閥門、水泵、電線電纜、通訊器材(不含無線廣播電視發(fā)射及衛(wèi)星地面接收設備)、醫(yī)療器械(***一類)、實驗設備、化工產品(不含危險化學品)、五金交電、照明設備。的公司，致力于發(fā)展為創(chuàng)新務實、誠實可信的企業(yè)。成都皖川科技擁有一支經驗豐富、技術創(chuàng)新的專業(yè)研發(fā)團隊，以高度的專注和執(zhí)著為客戶提供耐磨熱電偶，氣體檢測儀器，便攜式氣體報警控制器，雙金屬溫度計。成都皖川科技始終以本分踏實的精神和必勝的信念，影響并帶動團隊取得成功。成都皖川科技始終關注儀器儀表市場，以敏銳的市場洞察力，實現(xiàn)與客戶的成長共贏。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1589563.html</p></div></div></div></div></div><div id="e3dvcuw" class="page-right twoColRt"><div id="vfc3keb" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="wg2s3da" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強信息推薦自業(yè)物資供應" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強信息推薦自業(yè)物資供應</p></a></div><div 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