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雙法蘭液位計是(shi)測量變(bian)送(song)(song)器(qi)兩端(duan)壓(ya)(ya)力(li)(li)之差(cha)(cha)的(de)(de)(de)變(bian)送(song)(song)器(qi),輸出標準信號(如 4~20mA、1~5V)。差(cha)(cha)壓(ya)(ya)變(bian)送(song)(song)器(qi)與(yu)一(yi)(yi)般(ban)(ban)的(de)(de)(de)壓(ya)(ya)力(li)(li)變(bian)送(song)(song)器(qi)不同的(de)(de)(de)是(shi)它們(men)均有2個壓(ya)(ya)力(li)(li)接口, 差(cha)(cha)壓(ya)(ya)變(bian)送(song)(song)器(qi)一(yi)(yi)般(ban)(ban)分為(wei)正(zheng)壓(ya)(ya)端(duan)和負壓(ya)(ya)端(duan),一(yi)(yi)般(ban)(ban)情況下, 差(cha)(cha)壓(ya)(ya)變(bian)送(song)(song)器(qi)正(zheng)壓(ya)(ya)端(duan)的(de)(de)(de)壓(ya)(ya)力(li)(li)應大于負壓(ya)(ya)段壓(ya)(ya)力(li)(li)才能測量。
投入式液(ye)(ye)位(wei)計基(ji)于(yu)所測液(ye)(ye)體(ti)靜(jing)(jing)壓(ya)(ya)(ya)與該(gai)液(ye)(ye)體(ti)的(de)(de)(de)高度(du)成(cheng)(cheng)比(bi)例的(de)(de)(de)原(yuan)理,采用先進的(de)(de)(de)隔(ge)離型擴散硅敏感(gan)元(yuan)件或(huo)陶瓷電容壓(ya)(ya)(ya)力敏感(gan)傳(chuan)感(gan)器(qi)制作而成(cheng)(cheng),將靜(jing)(jing)壓(ya)(ya)(ya)轉(zhuan)換(huan)為(wei)電信(xin)號,再經(jing)過溫(wen)度(du)補償(chang)和線性修正,轉(zhuan)化(hua)成(cheng)(cheng)標(biao)準電信(xin)號(一般為(wei)4~20mA/1~5VDC)的(de)(de)(de)一種(zhong)測量液(ye)(ye)位(wei)的(de)(de)(de)壓(ya)(ya)(ya)力傳(chuan)感(gan)器(qi),又可以稱之為(wei)“靜(jing)(jing)壓(ya)(ya)(ya)液(ye)(ye)位(wei)計、液(ye)(ye)位(wei)變送器(qi)、液(ye)(ye)位(wei)傳(chuan)感(gan)器(qi)、水位(wei)傳(chuan)感(gan)器(qi)“。
超聲波液位(wei)計具(ju)有(you)抗干擾性強(qiang)。可(ke)(ke)任意設置上下(xia)限節(jie)點及在(zai)線輸(shu)出調節(jie),并帶有(you)現場顯(xian)示,可(ke)(ke)選擇(ze)模擬量,開關(guan)量及RS485輸(shu)出,方便的與相(xiang)(xiang)關(guan)設施接(jie)口。采用(yong)聚丙烯(xi)防水(shui)外殼。殼體(ti)小巧(qiao)且相(xiang)(xiang)當堅固,具(ju)有(you)優良的耐化(hua)(hua)學品性,對(dui)(dui)于(yu)無(wu)(wu)機化(hua)(hua)合物,不(bu)(bu)論酸、堿、鹽溶液,除(chu)強(qiang)氧(yang)化(hua)(hua)性物料(liao)外,幾乎(hu)都對(dui)(dui)其無(wu)(wu)破壞作(zuo)用(yong),對(dui)(dui)幾乎(hu)所(suo)有(you)溶劑在(zai)室溫下(xia)均不(bu)(bu)溶解(jie),一般烷、烴、醇、酚、醛、酮類等(deng)介質上均可(ke)(ke)使用(yong)。重量輕、不(bu)(bu)結(jie)垢、不(bu)(bu)污染介質。無(wu)(wu)毒性。可(ke)(ke)用(yong)于(yu)藥(yao)