不同物理原理的電子式或機(jī)械式流量監(jiān)控有各具優(yōu)勢(shì)的測(cè)量方式。如根據(jù)熱傳導(dǎo)原理，介質(zhì)的流速不同，則產(chǎn)生的熱量不同。

　　在線傳感器根據(jù)已知管道的橫截面來確定流量——首先檢測(cè)流速，然后根據(jù)流速計(jì)算流量。圖爾克FTCI系列流量傳感器可顯示當(dāng)前流量，性能穩(wěn)定，但不同的介質(zhì)導(dǎo)熱系數(shù)不同，它通常僅適用于水或加入乙二醇的混合液。

　　依據(jù)克利奧利原理進(jìn)行液體和氣體流量檢測(cè)的質(zhì)量流量計(jì)價(jià)格昂貴。當(dāng)介質(zhì)流過彎管處時(shí)，質(zhì)量流量計(jì)使其產(chǎn)生振蕩，并測(cè)量由此產(chǎn)生的克利奧利力。質(zhì)量流量計(jì)的優(yōu)點(diǎn)是測(cè)量精度高，動(dòng)態(tài)測(cè)量范圍，低壓力損失，同時(shí)適用于氣體和液體。

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