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電(dian)(dian)(dian)量(liang)變(bian)送器是(shi)一種將被(bei)測(ce)(ce)量(liang)參數(shu)(交(jiao)(jiao)流(liu)電(dian)(dian)(dian)流(liu)、交(jiao)(jiao)流(liu)電(dian)(dian)(dian)壓(ya)(ya)、有(you)(you)功(gong)功(gong)率、無(wu)功(gong)功(gong)率、有(you)(you)功(gong)電(dian)(dian)(dian)能(neng)、無(wu)功(gong)電(dian)(dian)(dian)能(neng)、頻率、相位、功(gong)率因數(shu)、直流(liu)電(dian)(dian)(dian)壓(ya)(ya)、直流(liu)電(dian)(dian)(dian)流(liu)等)按線(xian)性比例(li)轉換成(cheng)直流(liu)電(dian)(dian)(dian)流(liu)或電(dian)(dian)(dian)壓(ya)(ya)(電(dian)(dian)(dian)能(neng)脈沖輸出(chu))的(de)(de)(de)測(ce)(ce)量(liang)儀表(biao)。它廣泛應用于(yu)電(dian)(dian)(dian)力、石油、煤炭、冶金、鐵道(dao)、市(shi)政府等部門的(de)(de)(de)電(dian)(dian)(dian)氣測(ce)(ce)量(liang)、自動控制以(yi)及(ji)調度(du)系(xi)統。新型變(bian)送器******標(biao)準(zhun)(zhun)輸出(chu)的(de)(de)(de)模擬(ni)信號(hao)電(dian)(dian)(dian)流(liu)值(zhi)為4～20mA兩線(xian)制的(de)(de)(de)環路(lu)在(zai)(zai)發送數(shu)據以(yi)及(ji)控制那些易于(yu)以(yi)這(zhe)一標(biao)準(zhun)(zhun)接受指令的(de)(de)(de)某(mou)些執行器的(de)(de)(de)過(guo)程中有(you)(you)廣泛的(de)(de)(de)應用。******上(shang)已作(zuo)(zuo)為模擬(ni)信號(hao)中的(de)(de)(de)電(dian)(dian)(dian)流(liu)遙(yao)測(ce)(ce)技術(shu)***一標(biao)準(zhun)(zhun)。在(zai)(zai)利用兩根導線(xian)的(de)(de)(de)電(dian)(dian)(dian)流(liu)遙(yao)測(ce)(ce)電(dian)(dian)(dian)路(lu)中，變(bian)送器工作(zuo)(zuo)電(dian)(dian)(dian)源與示讀裝置(zhi)，包括傳感器工作(zuo)(zuo)電(dian)(dian)(dian)源和發送導線(xian)的(de)(de)(de)任何其它電(dian)(dian)(dian)阻都是(shi)相串(chuan)聯在(zai)(zai)環路(lu)內。