Rosemount®分析傳感器基于兩電極設(shè)計(jì)之上具有更精準(zhǔn)的優(yōu)勢. 加州IRVINE（2007年12月4日）消息，艾默生過程管理公司推出Rosemount Analytical PUR-Sense™型410VP電導(dǎo)率傳感器，一款用于食品飲料和生命科學(xué)行業(yè)衛(wèi)生應(yīng)用的，方便安裝的四電極接觸性傳感器. 此傳感器的生產(chǎn)原料符合FDA標(biāo)準(zhǔn)，滿足3A和EHEDG衛(wèi)生標(biāo)準(zhǔn)，廣泛應(yīng)用于衛(wèi)生處理過程中. Model 410VP PUR-Sense傳感器提供工業(yè)上最寬泛的導(dǎo)電性測量，提供例外的基于0.1 µSiemen/cm到600 mSiemen/cm的直線性測量. 410VP的典型應(yīng)用包括監(jiān)測高導(dǎo)電性液體的濃度，如清潔的溶解液電導(dǎo)率低. 其還可以被用在色析法分離中監(jiān)測洗提液，及液體界面的測試. Model 410VP適用于艾默生Model 1056型智能分析儀. 交流電流通過外部電極輸入，分析儀通過內(nèi)部電極對電壓進(jìn)行測試. 在操作過程中，電流不斷地變化以保持電壓的恒定. 因此，輸入的電流與溶液的導(dǎo)電率直接成比例. 由于電壓測量電路幾乎沒有電流、電容和電阻，在高導(dǎo)電率情況下在兩個電極測量中會導(dǎo)致相當(dāng)大的錯誤，所以必須在本質(zhì)上進(jìn)行排除. 電解電導(dǎo)率讀數(shù)是溫度的典型校準(zhǔn). Model 410VP利用Pt1000 RTD對溫度進(jìn)行感應(yīng)，通過與液體接觸來感應(yīng)溫度，所以對溫度的反應(yīng)就會變快. Model 410VP設(shè)計(jì)用于使啟動更快、更方便且無問題，其擁有精確的廠商定義的校對常數(shù)，能排除麻煩的校準(zhǔn)，保證最大限度的精確性. 可用于四種衛(wèi)生連接：1.5" tri-clamp, 2" tri-clamp, Ingold G1-1/4和Varivent®過程連接. 所有濕塑料和橡膠（僅G 1-1/4）都符合21CFR177，并且所有的濕面具有16微英寸（0.4微米）鐳光潔面. 關(guān)于艾默生過程管理 作為艾默生集團(tuán)的業(yè)務(wù)之一，艾默生過程管理為工業(yè)生產(chǎn)、加工、分銷提供自動化服務(wù)，應(yīng)用在化工、石油天然氣、精煉、紙漿和造紙、能源、食品飲料、醫(yī)藥等領(lǐng)域. 艾默生過程管理將先進(jìn)的產(chǎn)品和技術(shù)結(jié)合在為不同工業(yè)而設(shè)計(jì)的工程、咨詢、項(xiàng)目管理和維護(hù)服務(wù)中. 艾默生過程管理旗下的品牌有：PlantWeb, Micro Motion, Fisher, Rosemount, Mobrey, Daniel, Bristol, DeltaV, Ovation, 以及 AMS 套件. 關(guān)于艾默生 總部位于圣路易斯市的艾默生是一家全球領(lǐng)先的公司，該公司將技術(shù)與工程相結(jié)合，在網(wǎng)絡(luò)能源、過程管理、工業(yè)自動化、環(huán)境優(yōu)化技術(shù)及家電和工具等領(lǐng)域?yàn)榭蛻籼峁﹦?chuàng)新性的解決方案. 公司在2006 財(cái)年的銷售額達(dá)201 億美元. 更多信息：www.Emerson.com. [font=times]original text [/font] [font=times]Emerson launches four-electrode sensor for wide ranging conductivity measurements in sanitary applications [/font] [font=times][color=#708090]Rosemount® Analytical sensor has accuracy advantages over two-electrode designs IRVINE, CALIF （December 4, 2007） —— Emerson Process Management introduces the Rosemount Analytical PUR-Sense™ Model 410VP conductivity sensor, an easy to install four-electrode contacting sensor designed for sanitary applications in the food & beverage and life sciences industries. The sensor is manufactured from FDA compliant materials, meets 3A and EHEDG hygienic standards, and is available with a range of sanitary process connections. The Model 410VP PUR-Sense sensor offers the industry’s widest conductivity measurement range, providing exceptional linearity between 0.1 µSiemen/cm to 600 mSiemen/cm. Typical applications for the Model 410VP include monitoring the concentration of high conductivity fluids such as clean-in-place solvents and low conductivity rinses. It can also be used for monitoring eluents in chromatographic separations, and for the detection of liquid interfaces, all with the same sensor. The Model 410VP is compatible with the Emerson Model 1056 Intelligent Analyzer. An alternating current is injected through the outer electrodes and the analyzer measures the voltage across the inner electrodes. During operation, the current is continuously altered to keep the voltage constant. Thus, the injected current is directly proportional to the conductance of the solution. Because the voltage measuring circuit draws almost no current, series capacitance and cable resistance, which cause considerable error in two-electrode measurements at high conductivity, are essentially eliminated. Electrolytic conductivity readings are typically corrected for temperature. The Model 410VP uses an integrated Pt1000 RTD that makes contact with the process liquid through a stainless steel capsule flush with the sensing face, so temperature response is fast. The Model 410VP is designed for fast, easy, and trouble free start-up. It has an accurate factory-determined calibration constant, which eliminates the need for troublesome calibrations against liquid standards and ensures maximum accuracy. It is available with four sanitary connections; 1.5" tri-clamp, 2" tri-clamp, Ingold G1-1/4, or Varivent® Process Connection. All wetted plastics and elastomers （G 1-1/4 version only） are compliant with 21CFR177, and all wetted surfaces have a 16 microinch （0.4 micrometer） Ra finish. About Emerson Process Management Emerson Process Management （www.EmersonProcess.com）, an Emerson business, is a leader in helping businesses automate their production, processing and distribution in the chemical, oil and gas, refining, pulp and paper, power, water and wastewater treatment, food and beverage, pharmaceutical and other industries. A division of Emerson, Rosemount Analytical （www.EmersonProcess.com/raihome/liquid/） designs and manufactures refractometers, analyzers, transmitters and sensors for the on-line measurement of pH, ORP, conductivity, dissolved oxygen, chlorine, ozone and turbidity. The best-in-class technology and expertise of Rosemount Analytical play a key role in the Emerson mission of combining superior products and technology with industry-specific engineering, consulting, project management and maintenance services. Emerson brands include PlantWeb®, Fisher®, Micro Motion®, Rosemount®, Mobrey®, Daniel®, Bristol®, DeltaV™, Ovation®, and AMS™ Suite. About Emerson Emerson, based in St. Louis, is a global leader in bringing technology and engineering together to provide innovative solutions to customers through its network power, process management, industrial automation, climate technologies, and appliance and tools businesses. Sales in fiscal 2007 were $22.6 billion. For more information, visit www.Emerson.com.[/color][/font]