電(dian)(dian)(dian)磁(ci)(ci)(ci)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)量(liang)(liang)(liang)計(ji)是(shi)建立在法拉(la)第電(dian)(dian)(dian)磁(ci)(ci)(ci)感應定律之上(shang)(shang)的(de)。在法拉(la)第試驗(yan)中(zhong)，電(dian)(dian)(dian)磁(ci)(ci)(ci)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)量(liang)(liang)(liang)計(ji)丈(zhang)量(liang)(liang)(liang)的(de)導電(dian)(dian)(dian)介質相(xiang)當于一根導電(dian)(dian)(dian)金屬棒，其(qi)上(shang)(shang)下兩端的(de)兩個電(dian)(dian)(dian)磁(ci)(ci)(ci)線(xian)圈發(fa)生(sheng)恒定磁(ci)(ci)(ci)場(chang)。當有(you)(you)導電(dian)(dian)(dian)介質通(tong)過期，會發(fa)生(sheng)感應電(dian)(dian)(dian)壓(作業原理(li)見下圖)。管中(zhong)有(you)(you)兩個電(dian)(dian)(dian)極(ji)丈(zhang)量(liang)(liang)(liang)感應電(dian)(dian)(dian)壓。丈(zhang)量(liang)(liang)(liang)管路(lu)以(yi)非導電(dian)(dian)(dian)面料(橡膠、特氟隆等)實現與(yu)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)體及(ji)丈(zhang)量(liang)(liang)(liang)電(dian)(dian)(dian)極(ji)的(de)電(dian)(dian)(dian)磁(ci)(ci)(ci)阻隔。電(dian)(dian)(dian)磁(ci)(ci)(ci)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)量(liang)(liang)(liang)計(ji)的(de)商(shang)場(chang)功(gong)(gong)用(yong)(yong)差別很大，簡(jian)單的(de)便(bian)是(shi)丈(zhang)量(liang)(liang)(liang)單向(xiang)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)量(liang)(liang)(liang)，只輸出(chu)模擬信(xin)號驅(qu)動(dong)后位的(de)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)量(liang)(liang)(liang)；多(duo)功(gong)(gong)用(yong)(yong)電(dian)(dian)(dian)磁(ci)(ci)(ci)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)量(liang)(liang)(liang)計(ji)有(you)(you)丈(zhang)量(liang)(liang)(liang)雙向(xiang)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)量(liang)(liang)(liang)，規模切換，繼電(dian)(dian)(dian)器(qi)上(shang)(shang)下限流(liu)(liu)(liu)(liu)(liu)(liu)(liu)量(liang)(liang)(liang)輸出(chu)，空管和電(dian)(dian)(dian)源切斷提醒(xing)，小信(xin)號切除，流(liu)(liu)(liu)(liu)(liu)(liu)(liu)量(liang)(liang)(liang)顯現和總(zong)量(liang)(liang)(liang)計(ji)算，自(zi)動(dong)校驗(yan)和毛病(bing)自(zi)診斷，與(yu)上(shang)(shang)位機通(tong)訊和動(dong)作裝備等。有(you)(you)些(xie)儀器(qi)還具(ju)有(you)(you)串行數字通(tong)訊功(gong)(gong)用(yong)(yong)，能夠選擇多(duo)種通(tong)訊接(jie)口和專用(yong)(yong)芯片(pian)(ASIC)，用(yong)(yong)來連(lian)接(jie)HART協(xie)議體系、PROFTBUS、Modbus、FF現場(chang)總(zong)線(xian)等。電(dian)(dian)(dian)磁(ci)(ci)(ci)流(liu)(liu)(liu)(liu)(liu)(liu)(liu)量(liang)(liang)(liang)計(ji)具(ju)有(you)(you)一系列優異的(de)性能，解決(jue)了其(qi)他流(liu)(liu)(liu)(liu)(liu)(liu)(liu)量(liang)(liang)(liang)計(ji)不(bu)方便(bian)運用(yong)(yong)的(de)問題，如(ru)臟流(liu)(liu)(liu)(liu)(liu)(liu)(liu)、腐流(liu)(liu)(liu)(liu)(liu)(liu)(liu)檢測等。上(shang)(shang)世紀七(qi)八十年代，電(dian)(dian)(dian)磁(ci)(ci)(ci)波流(liu)(liu)(liu)(liu)(liu)(liu)(liu)量(liang)(liang)(liang)技能有(you)(you)了重大突(tu)破，使用(yong)(yong)非常廣泛(fan)。

安(an)培計的優點：

本產品適用(yong)于丈(zhang)量紙(zhi)漿、泥漿、污(wu)水等液(ye)-固(gu)二(er)相流體中(zhong)的固(gu)體顆(ke)粒，具有杰出的通暢(chang)性，無阻塞性。

無檢測流量引(yin)起的(de)壓力損失(shi)，具(ju)有杰(jie)出的(de)節能效果。

實際上，所測得(de)的體(ti)積流(liu)量并不受流(liu)體(ti)密度(du)，粘度(du)，溫度(du)，壓(ya)力和導(dao)電性的影(ying)響；

第(di)四(si)，大(da)流量(liang)規模、大(da)口徑規模；

能夠運(yun)用的(de)腐蝕性流體(ti)。

電磁感應缺(que)點：

不(bu)能丈量(liang)導電極低的液體，如石油(you)制品。

無法丈量氣(qi)體、蒸汽和(he)液體中含有較大氣(qi)泡(pao)。

不要(yao)在較高的溫度下運用。

電磁式水表使用廣泛，大口徑水表多用于(yu)給排水工(gong)(gong)(gong)程(cheng)；常用于(yu)要求高或(huo)丈量困難的(de)場合，如鋼鐵工(gong)(gong)(gong)業高爐(lu)風口冷卻水的(de)控制、造紙工(gong)(gong)(gong)業紙漿(jiang)及(ji)黑液(ye)的(de)丈量、化工(gong)(gong)(gong)工(gong)(gong)(gong)業強(qiang)腐蝕劑、有色冶金工(gong)(gong)(gong)業礦漿(jiang)；還(huan)常用于(yu)制藥、食物、生物化學等衛生要求較(jiao)高的(de)職業。