德國(guo)賀德克HYDAC Technology GmbH 生產(chan)用于流體過濾技(ji)(ji)(ji)術、液(ye)壓控制技(ji)(ji)(ji)術、電(dian)子測(ce)量技(ji)(ji)(ji)術的元件(jian)和裝置，是過濾器、蓄能器、液(ye)壓閥、電(dian)子產(chan)品、管夾、電(dian)磁鐵(tie)、液(ye)壓系(xi)統(tong)總成等產(chan)品的液(ye)壓件(jian)制造商(shang)。德國(guo)賀德克HYDAC產(chan)品的應用范圍十分廣泛(fan)，幾乎覆蓋各(ge)行各(ge)業(ye)(ye)，尤其在冶金工(gong)業(ye)(ye)、汽車工(gong)業(ye)(ye)、電(dian)力設備(bei)、化工(gong)、工(gong)程機械、造紙工(gong)業(ye)(ye)、造船工(gong)業(ye)(ye)以及機床制造等領域都得(de)到(dao)廣泛(fan)應用

壓(ya)力(li)(li)傳(chuan)感(gan)(gan)器(qi)(qi)(qi)兩線(xian)(xian)(xian)(xian)(xian)(xian)(xian)制(zhi)比(bi)較(jiao)(jiao)簡(jian)單(dan)(dan)，一(yi)般客戶(hu)都知道怎(zen)么接(jie)(jie)(jie)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)，一(yi)根(gen)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)連(lian)接(jie)(jie)(jie)電(dian)(dian)源正極(ji)，另一(yi)個(ge)(ge)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)也(ye)就是(shi)(shi)信號(hao)(hao)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)經過(guo)儀器(qi)(qi)(qi)連(lian)接(jie)(jie)(jie)到電(dian)(dian)源負極(ji)，這種是(shi)(shi)簡(jian)單(dan)(dan)的(de)(de)(de)，壓(ya)力(li)(li)傳(chuan)感(gan)(gan)器(qi)(qi)(qi)三(san)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)制(zhi)是(shi)(shi)在兩線(xian)(xian)(xian)(xian)(xian)(xian)(xian)制(zhi)基(ji)礎(chu)上加了一(yi)個(ge)(ge)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)，這根(gen)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)直接(jie)(jie)(jie)連(lian)接(jie)(jie)(jie)到電(dian)(dian)源的(de)(de)(de)負極(ji)，較(jiao)(jiao)兩線(xian)(xian)(xian)(xian)(xian)(xian)(xian)制(zhi)麻煩(fan)一(yi)點。四線(xian)(xian)(xian)(xian)(xian)(xian)(xian)制(zhi)壓(ya)力(li)(li)傳(chuan)感(gan)(gan)器(qi)(qi)(qi)肯(ken)定是(shi)(shi)兩個(ge)(ge)電(dian)(dian)源輸(shu)入端(duan)，另外兩個(ge)(ge)是(shi)(shi)信號(hao)(hao)輸(shu)出端(duan)。四線(xian)(xian)(xian)(xian)(xian)(xian)(xian)制(zhi)的(de)(de)(de)多半是(shi)(shi)電(dian)(dian)壓(ya)輸(shu)出而不是(shi)(shi)4~20mA輸(shu)出，4~20mA的(de)(de)(de)叫壓(ya)力(li)(li)變送器(qi)(qi)(qi)，多數做成兩線(xian)(xian)(xian)(xian)(xian)(xian)(xian)制(zhi)的(de)(de)(de)。壓(ya)力(li)(li)傳(chuan)感(gan)(gan)器(qi)(qi)(qi)的(de)(de)(de)信號(hao)(hao)輸(shu)出有些是(shi)(shi)沒(mei)有經過(guo)放大(da)的(de)(de)(de)，滿量(liang)(liang)(liang)程輸(shu)出只有幾十毫伏，而有些壓(ya)力(li)(li)傳(chuan)感(gan)(gan)器(qi)(qi)(qi)在內部有放大(da)電(dian)(dian)路，滿量(liang)(liang)(liang)程輸(shu)出為0~2V。至于怎(zen)么接(jie)(jie)(jie)到顯示儀表(biao)，要(yao)(yao)看儀表(biao)的(de)(de)(de)量(liang)(liang)(liang)程是(shi)(shi)多大(da)，如果有和輸(shu)出信號(hao)(hao)相適應的(de)(de)(de)檔位，就可以直接(jie)(jie)(jie)測(ce)量(liang)(liang)(liang)，否則要(yao)(yao)加信號(hao)(hao)調整電(dian)(dian)路。五(wu)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)制(zhi)壓(ya)力(li)(li)傳(chuan)感(gan)(gan)器(qi)(qi)(qi)與四線(xian)(xian)(xian)(xian)(xian)(xian)(xian)制(zhi)相差不大(da)，市面上五(wu)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)制(zhi)的(de)(de)(de)傳(chuan)感(gan)(gan)器(qi)(qi)(qi)也(ye)比(bi)較(jiao)(jiao)少。

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