德國原裝E+H渦街流量計

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Mass flow is computed by entering fixed operating density values or by pressure/temperature-compensated calculation by an external flow computer (e.g. RMS 621 or RMC 621)

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德國進口（非導電液體）E+H渦街流量計

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E+H渦街流量計也稱之為旋渦流量計或卡門渦街流量計。綜合吸收發(fā)達國家*技術(shù)和總結(jié)多年研究生產(chǎn)經(jīng)驗的基礎(chǔ)上進行精心設(shè)計的產(chǎn)品，實現(xiàn)了產(chǎn)品智能化、標準化、系列化、通用化、生產(chǎn)模具化、確保產(chǎn)品質(zhì)量的美觀性。該產(chǎn)品具有電路*、功耗微低、量程比寬、結(jié)構(gòu)簡單、阻力損失小、堅固耐用、用途廣、使用壽命長、工作穩(wěn)定、便于安裝調(diào)試等特點。

參數(shù)及要求

◆測量介質(zhì)：氣體、液體、蒸氣

溫壓補償型渦街流量計——迪元儀表

◆連接方式：法蘭卡裝式、法蘭式、插入式

◆口徑規(guī)格法蘭卡裝式口徑選擇 25,32,50,80,10

◆法蘭連接式口徑選擇 100,150,200

◆流量測量范圍正常測量流速范圍雷諾數(shù)1.5×104～4×106；氣體5～50m/s; 液體0.5～7m/s

正常測量流量范圍液體、氣體流量測量范圍見表2；蒸氣流量范圍見表3

◆測量精度 1.0級 1.5級

◆被測介質(zhì)溫度:常溫–25℃～100℃，高溫–25℃～150℃ -25℃～250℃

◆輸出信號脈沖電壓輸出信號高電平8～10V 低電平0.7～1.3V

◆脈沖占空比約50%,傳輸距離為100m

◆脈沖電流遠傳信號 4～20 mA,傳輸距離為1000m

◆儀表使用環(huán)境溫度:-25℃～+55℃ 濕度:5～90% RH50℃

分離式渦街流量計——迪元儀表

◆材質(zhì) 不銹鋼, 鋁合金

◆電源 DC24V或鋰電池3.6V

◆防爆等級本安型iaIIbT3-T6，防護等級 IP65

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德國進口（非導電液體）E+H渦街流量計原理：在流體中設(shè)置三角柱型旋渦發(fā)生體，則從旋渦發(fā)生體兩側(cè)交替地產(chǎn)生有規(guī)則的旋渦，這種旋渦稱為卡門旋渦，旋渦列在旋渦發(fā)生體下游非對稱地排列。

渦街流量計是根據(jù)卡門渦街原理（Kármán Vortex Street）測量氣體、蒸汽或液體的體積流量、標況的體積流量或質(zhì)量流量的體積流量計。并可作為流量變送器應(yīng)用于自動化控制系統(tǒng)中。

渦街流量計是應(yīng)用流體振蕩原理來測量流量的，流體在管道中經(jīng)過渦街流量變送器時，在三角柱的旋渦發(fā)生體后上下交替產(chǎn)生正比于流速的兩列旋渦，旋渦的釋放頻率與流過旋渦發(fā)生體的流體平均速度及旋渦發(fā)生體特征寬度有關(guān)，可用下式表示：

式中:為旋渦