射頻導納式液位開關是電容式物(wu)位開關(guan)的換代(dai)產(chan)品(pin)(pin)，解決了物(wu)料粘附問題，相比其(qi)它同類產(chan)品(pin)(pin)具有更高的系(xi)統穩定性(xing)。即使在惡(e)劣的現場條件下，也能可靠工作，而(er)不受掛料、溫(wen)度、壓力、材料密度、濕度、甚至物(wu)料化學特性(xing)變(bian)化的影(ying)響(xiang)。

測量原理：

射頻導納式液位開關儀表是一(yi)種從電(dian)(dian)(dian)(dian)(dian)容式物(wu)位測(ce)量(liang)(liang)(liang)技(ji)術(shu)(shu)(shu)發(fa)展起(qi)來(lai)的(de)(de)，防掛料(liao)、更(geng)可靠、更(geng)準確、適用性(xing)(xing)(xing)更(geng)廣的(de)(de)物(wu)位控制技(ji)術(shu)(shu)(shu)，射(she)(she)頻導納(na)中的(de)(de)導納(na)的(de)(de)含義為電(dian)(dian)(dian)(dian)(dian)學中阻抗的(de)(de)倒(dao)數(shu)，它(ta)由電(dian)(dian)(dian)(dian)(dian)阻性(xing)(xing)(xing)成(cheng)(cheng)分(fen)、電(dian)(dian)(dian)(dian)(dian)容性(xing)(xing)(xing)成(cheng)(cheng)分(fen)、電(dian)(dian)(dian)(dian)(dian)感(gan)性(xing)(xing)(xing)成(cheng)(cheng)分(fen)綜合而(er)成(cheng)(cheng)。而(er)射(she)(she)頻即(ji)發(fa)射(she)(she)高頻無線電(dian)(dian)(dian)(dian)(dian)波，所以射(she)(she)頻導納(na)物(wu)位控制技(ji)術(shu)(shu)(shu)是通過(guo)用高頻無線電(dian)(dian)(dian)(dian)(dian)波測(ce)量(liang)(liang)(liang)被測(ce)介質導納(na)來(lai)實現物(wu)位測(ce)量(liang)(liang)(liang)。射(she)(she)頻導納(na)技(ji)術(shu)(shu)(shu)與(yu)電(dian)(dian)(dian)(dian)(dian)容式技(ji)術(shu)(shu)(shu)zui重(zhong)要的(de)(de)區別在于(yu)測(ce)量(liang)(liang)(liang)量(liang)(liang)(liang)的(de)(de)多樣(yang)化和(he)三(san)電(dian)(dian)(dian)(dian)(dian)極技(ji)術(shu)(shu)(shu)。射(she)(she)頻導納(na)測(ce)量(liang)(liang)(liang)量(liang)(liang)(liang)的(de)(de)多樣(yang)化在于(yu)不止(zhi)是測(ce)電(dian)(dian)(dian)(dian)(dian)容量(liang)(liang)(liang)，還有電(dian)(dian)(dian)(dian)(dian)阻和(he)電(dian)(dian)(dian)(dian)(dian)感(gan)量(liang)(liang)(liang)，是測(ce)量(liang)(liang)(liang)更(geng)加準確。三(san)電(dian)(dian)(dian)(dian)(dian)極技(ji)術(shu)(shu)(shu)包(bao)括電(dian)(dian)(dian)(dian)(dian)子單元和(he)傳感(gan)器，在測(ce)量(liang)(liang)(liang)電(dian)(dian)(dian)(dian)(dian)極和(he)地極之間加入屏蔽電(dian)(dian)(dian)(dian)(dian)極，將(jiang)測(ce)量(liang)(liang)(liang)電(dian)(dian)(dian)(dian)(dian)極保護(hu)起(qi)來(lai)，不受掛料(liao)影響。

基本參數：

供(gong)電：220VAC±50VAC50/60HZ(標準(zhun))或24VDC±;5VDC(可選)

輸(shu)出：DPDT繼(ji)電器(雙刀(dao)雙擲)

輸出(chu)容量：220VAC5A

環境溫(wen)度(du)：-40°C～70°C

響應時(shi)間(jian)：<0.5s延時(shi)：1～50s(可選)

分辨率：<0.5PF

火花防護：內置火花防護電路