射頻導納式液位開關是電容式(shi)物位開關(guan)的換代產品，解決了物料(liao)粘附問(wen)題，相比其它同類產品具(ju)有更高的系統穩定性(xing)。即(ji)使(shi)在惡劣的現場條件下，也能可靠(kao)工(gong)作，而不(bu)受掛料(liao)、溫度、壓力、材(cai)料(liao)密度、濕(shi)度、甚至(zhi)物料(liao)化(hua)學特(te)性(xing)變化(hua)的影響。

測量原理：

射頻導納式液位開關儀表是一種從電(dian)(dian)(dian)容(rong)式(shi)物(wu)(wu)位測(ce)(ce)量(liang)(liang)(liang)(liang)技(ji)(ji)(ji)術(shu)(shu)發展起(qi)來的(de)(de)，防掛料、更可靠、更準(zhun)確(que)、適用性更廣的(de)(de)物(wu)(wu)位控制技(ji)(ji)(ji)術(shu)(shu)，射(she)(she)(she)頻(pin)(pin)(pin)導(dao)納中的(de)(de)導(dao)納的(de)(de)含(han)義為電(dian)(dian)(dian)學中阻抗(kang)的(de)(de)倒數，它(ta)由電(dian)(dian)(dian)阻性成分、電(dian)(dian)(dian)容(rong)性成分、電(dian)(dian)(dian)感(gan)性成分綜(zong)合而成。而射(she)(she)(she)頻(pin)(pin)(pin)即發射(she)(she)(she)高(gao)頻(pin)(pin)(pin)無線電(dian)(dian)(dian)波，所以射(she)(she)(she)頻(pin)(pin)(pin)導(dao)納物(wu)(wu)位控制技(ji)(ji)(ji)術(shu)(shu)是通過用高(gao)頻(pin)(pin)(pin)無線電(dian)(dian)(dian)波測(ce)(ce)量(liang)(liang)(liang)(liang)被測(ce)(ce)介質導(dao)納來實現物(wu)(wu)位測(ce)(ce)量(liang)(liang)(liang)(liang)。射(she)(she)(she)頻(pin)(pin)(pin)導(dao)納技(ji)(ji)(ji)術(shu)(shu)與電(dian)(dian)(dian)容(rong)式(shi)技(ji)(ji)(ji)術(shu)(shu)zui重要的(de)(de)區別在于測(ce)(ce)量(liang)(liang)(liang)(liang)量(liang)(liang)(liang)(liang)的(de)(de)多樣化(hua)和(he)三電(dian)(dian)(dian)極(ji)(ji)(ji)(ji)技(ji)(ji)(ji)術(shu)(shu)。射(she)(she)(she)頻(pin)(pin)(pin)導(dao)納測(ce)(ce)量(liang)(liang)(liang)(liang)量(liang)(liang)(liang)(liang)的(de)(de)多樣化(hua)在于不止是測(ce)(ce)電(dian)(dian)(dian)容(rong)量(liang)(liang)(liang)(liang)，還有電(dian)(dian)(dian)阻和(he)電(dian)(dian)(dian)感(gan)量(liang)(liang)(liang)(liang)，是測(ce)(ce)量(liang)(liang)(liang)(liang)更加(jia)準(zhun)確(que)。三電(dian)(dian)(dian)極(ji)(ji)(ji)(ji)技(ji)(ji)(ji)術(shu)(shu)包括電(dian)(dian)(dian)子單(dan)元(yuan)和(he)傳感(gan)器，在測(ce)(ce)量(liang)(liang)(liang)(liang)電(dian)(dian)(dian)極(ji)(ji)(ji)(ji)和(he)地極(ji)(ji)(ji)(ji)之(zhi)間加(jia)入(ru)屏(ping)蔽電(dian)(dian)(dian)極(ji)(ji)(ji)(ji)，將(jiang)測(ce)(ce)量(liang)(liang)(liang)(liang)電(dian)(dian)(dian)極(ji)(ji)(ji)(ji)保護起(qi)來，不受掛料影響(xiang)。

基本參數：

供電：220VAC±50VAC50/60HZ(標(biao)準)或24VDC±5VDC(可選)

輸出：DPDT繼電(dian)器(雙刀雙擲(zhi))

輸出容(rong)量(liang)：220VAC5A

環(huan)境溫(wen)度：-40°C～70°C

響(xiang)應時間：<0.5s延時：1～50s(可(ke)選)

分辨(bian)率：<0.5PF

火(huo)花防護(hu)：內置(zhi)火(huo)花防護(hu)電路(lu)