德國(guó)賀德克蓄能器,，德國(guó)倍加福P+F傳感器,，德國(guó)克拉克Burkert流量計(jì)，德國(guó)西克賀德克編碼器等,。
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應(yīng)用比較多的換能器是外夾式和插入式。單聲道超聲波流量計(jì)結(jié)構(gòu)簡(jiǎn)單,、使用方便,，但這種流量計(jì)對(duì)流態(tài)分布變化適應(yīng)性差，微電子技術(shù)和計(jì)算機(jī)技術(shù)的飛躍發(fā)展極大地推動(dòng)儀表更新?lián)Q代,，新型流量計(jì)如雨后春筍般涌現(xiàn)出來,。至今，據(jù)稱已有上百種流量計(jì)投向市場(chǎng),，現(xiàn)場(chǎng)使用中許多棘手的難題可望獲得解決,。我國(guó)開展近代流量測(cè)量技術(shù)的工作比較晚，被設(shè)置在測(cè)量流動(dòng)通道6的上游端并相對(duì)于孔眼11和12,，用于減少被測(cè)量的流體流入孔眼11和12;測(cè)量控制部件19,，用于測(cè)量超聲波換能器8和9之間的超聲波的傳播時(shí)間;及計(jì)算部件20，用于根據(jù)該測(cè)量控制部件19的信號(hào)計(jì)算流量,。

流量計(jì)英文名稱是flowmeter,，全國(guó)科學(xué)技術(shù)名詞審定委員會(huì)把它定義為：指示被測(cè)流量和（或）在選定的時(shí)間間隔內(nèi)流體總量的儀表。簡(jiǎn)單來說就是用于測(cè)量管道或明渠中流體流量的一種儀表,。
流量計(jì)又分為有差壓式流量計(jì),、轉(zhuǎn)子流量計(jì)、節(jié)流式流量計(jì),、細(xì)縫流量計(jì),、容積流量計(jì)、電磁流量計(jì),、超聲波流量計(jì)等,。按介質(zhì)分類：液體流量計(jì)和氣體流量計(jì)。

由于缺乏國(guó)家在這行業(yè)體制機(jī)制強(qiáng)有力的支持,，造成我國(guó)儀器儀表行業(yè)缺乏高層次的復(fù)合型人才,，缺乏熟悉、精通各學(xué)科交叉的綜合型人才,。自主創(chuàng)新能力低下,，自主知識(shí)產(chǎn)權(quán)匱乏。具體表現(xiàn)在國(guó)產(chǎn)自動(dòng)化產(chǎn)品奇缺,，市場(chǎng)競(jìng)爭(zhēng)力不強(qiáng),。

流量計(jì)盡量避開鐵磁性物體及具有強(qiáng)電磁場(chǎng)的設(shè)備(如大電機(jī),、大變壓器的等)，以免磁場(chǎng)影響傳感器的工作磁場(chǎng)和流量信號(hào),。傳感器勺轉(zhuǎn)換器間的流量信號(hào)線和激磁線。然而從雷電故障中損壞零部件的分析,，引起故障的感應(yīng)高電壓和浪涌電流大部分足從控制室電源線路引入的,，其他兩條途徑較少。由于電磁流量計(jì)測(cè)量含有懸浮固相或污臟體的機(jī)會(huì)遠(yuǎn)比其他流量?jī)x表多,，出現(xiàn)內(nèi)壁附著層產(chǎn)生的故障概率也就相對(duì)較高,。若附著層電導(dǎo)率與液體電導(dǎo)率相近。常見的調(diào)試期故障通常由安裝不妥,。

科拉特流量計(jì)現(xiàn)貨型號(hào)如下：

VC0.04E6RS/
VC0.04E6RS
VC0.04E6RH
VC0.04E6RK
VC0.04E6RV
VC0.04E6RX
VC0.04E6RKX
VC0.04E7PS/
VC0.04E7PH
VC0.04E7PK
VC0.04E7PV
VC0.04E7PX
VC0.04E7PKX
VC0.04E7RS
VC0.04E7RS/

VC0.04E7RS
VC0.04E7RH
VC0.04E7RK
VC0.04E7RV
VC0.04E7RX
VC0.04E7RKX
VC0.04E8PS/
VC0.04E8PH
VC0.04E8PK
VC0.04E8PV
VC0.04E8PX
VC0.04E8PKX
VC0.04E8RS
VC0.04E8RS/
VC0.04E8RS
VC0.04E8RH
VC0.04E8RK
VC0.04E8RV
VC0.04E8RX
VC0.04E8RKX

VC0.04P1PS/
VC0.04P1PS
VC0.04P1PH
VC0.04P1PK
VC0.04P1PV
VC0.04P1PX
VC0.04P1PKX
VC0.04P1RS
VC0.04P1RS/
VC0.04P1RS
VC0.04P1RH
VC0.04P1RK
VC0.04P1RV
VC0.04P1RX
VC0.04P1RKX
VC0.04P2PS/

VC0.04P2PS
VC0.04P2PH
VC0.04P2PK
VC0.04P2PV
VC0.04P2PX
VC0.04P2RS/
VC0.04P2RS
VC0.04P2RH
VC0.04P2RK
VC0.04P2RV
VC0.04P2RX
VC0.04P3PS
VC0.04P3PH
VC0.04P3PK
VC0.04P3PV
VC0.04P3PX
VC0.04P3PKX
VC0.04P3RS
VC0.04P3RS/

VC0.04P3RS
VC0.04P3RH
VC0.04P3RK
VC0.04P3RV
VC0.04P3RX
VC0.04P3RKX
VC0.04P4PS/
VC0.04P4PH
VC0.04P4PK
VC0.04P4PV
VC0.04P4PX
VC0.04P4PKX
VC0.04P4RS
VC0.04P4RS/
VC0.04P4RS
VC0.04P4RH
VC0.04P4RK
VC0.04P4RV
VC0.04P4RX
VC0.04P4RKX
VC0.04P5PS/

VC0.04P5PH
VC0.04P5PK
VC0.04P5PV
VC0.04P5PX
VC0.04P5PKX
VC0.04P5RS
VC0.04P5RS/
VC0.04P5RS
VC0.04P5RH
VC0.04P5RK
VC0.04P5RV
VC0.04P5RX
VC0.04P5RKX
VC0.04P6PS/
VC0.04P6PH
VC0.04P6PK
VC0.04P6PV
VC0.04P6PX
VC0.04P6PKX
VC0.04P6RS
VC0.04P6RS/

VC0.04P6RS
VC0.04P6RH
VC0.04P6RK
VC0.04P6RV
VC0.04P6RX
VC0.04P6RKX
VC0.04P7PS/
VC0.04P7PH
VC0.04P7PK
VC0.04P7PV
VC0.04P7PX
VC0.04P7PKX
VC0.04P7RS
VC0.04P7RS/
VC0.04P7RS
VC0.04P7RH
VC0.04P7RK
VC0.04P7RV
VC0.04P7RX
VC0.04P7RKX
VC0.04P8PS/

VC0.04P8PH
VC0.04P8PK
VC0.04P8PV
VC0.04P8PX
VC0.04P8PKX
VC0.04P8RS
VC0.04P8RS/
VC0.04P8RS
VC0.04P8RH
VC0.04P8RK
VC0.04P8RV
VC0.04P8RX
VC0.04P8RKX

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