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雙法蘭液(ye)位計是測量變(bian)(bian)送器(qi)(qi)(qi)兩端(duan)壓(ya)(ya)力(li)之差(cha)的變(bian)(bian)送器(qi)(qi)(qi),輸出標準信號(hao)(如 4~20mA、1~5V)。差(cha)壓(ya)(ya)變(bian)(bian)送器(qi)(qi)(qi)與(yu)一(yi)(yi)般(ban)的壓(ya)(ya)力(li)變(bian)(bian)送器(qi)(qi)(qi)不同的是它們均有2個壓(ya)(ya)力(li)接口, 差(cha)壓(ya)(ya)變(bian)(bian)送器(qi)(qi)(qi)一(yi)(yi)般(ban)分為正壓(ya)(ya)端(duan)和負壓(ya)(ya)端(duan),一(yi)(yi)般(ban)情況下, 差(cha)壓(ya)(ya)變(bian)(bian)送器(qi)(qi)(qi)正壓(ya)(ya)端(duan)的壓(ya)(ya)力(li)應大于(yu)負壓(ya)(ya)段壓(ya)(ya)力(li)才能測量。
投入式(shi)液(ye)(ye)(ye)位計基于所(suo)測液(ye)(ye)(ye)體靜(jing)(jing)壓(ya)與該液(ye)(ye)(ye)體的高度成(cheng)(cheng)(cheng)比例(li)的原理,采用先進的隔離(li)型擴散硅(gui)敏感(gan)元件(jian)或陶瓷電(dian)(dian)容壓(ya)力(li)敏感(gan)傳感(gan)器制作而(er)成(cheng)(cheng)(cheng),將靜(jing)(jing)壓(ya)轉換為電(dian)(dian)信(xin)號,再經過溫度補(bu)償和線性修正,轉化成(cheng)(cheng)(cheng)標準電(dian)(dian)信(xin)號(一(yi)般為4~20mA/1~5VDC)的一(yi)種測量液(ye)(ye)(ye)位的壓(ya)力(li)傳感(gan)器,又可以稱之為“靜(jing)(jing)壓(ya)液(ye)(ye)(ye)位計、液(ye)(ye)(ye)位變送器、液(ye)(ye)(ye)位傳感(gan)器、水位傳感(gan)器“。
超聲波液(ye)位計具有抗干(gan)擾性(xing)強(qiang)。可任意設置上下限(xian)節(jie)點及在(zai)線輸(shu)出調節(jie),并帶有現場顯示,可選擇模擬量(liang),開關量(liang)及RS485輸(shu)出,方便的(de)與相關設施接口。采用(yong)(yong)聚丙烯防(fang)水外殼(ke)。殼(ke)體小巧且相當堅固,具有優(you)良的(de)耐化(hua)學品性(xing),對(dui)于無機化(hua)合物,不(bu)論酸、堿、鹽溶(rong)液(ye),除強(qiang)氧化(hua)性(xing)物料外,幾乎(hu)都對(dui)其(qi)無破壞作用(yong)(yong),對(dui)幾乎(hu)所(suo)有溶(rong)劑在(zai)室(shi)溫(wen)下均不(bu)溶(rong)解,一般烷(wan)、烴、醇(chun)、酚(fen)、醛(quan)、酮類等(deng)介質(zhi)上均可使(shi)用(yong)(yong)。重(zhong)量(liang)輕、不(bu)結垢、不(bu)污染介質(zhi)。無毒性(xing)。可用(yong)(yong)于藥