Dwyer CRF2系列 電容式料位變送器
用于粉末，物料，液體
CRF2系列 電容式料位變送器是兩線(xiàn)制4-20mA輸出的能夠監(jiān)測(cè)液體，粉體和顆粒物料的料位。采用了先進(jìn)的脈沖射頻導(dǎo)納技術(shù)，具有很高的測(cè)量精度和穩(wěn)定性能。CRF2系列測(cè)量料位高度的原理是通過(guò)測(cè)量槽罐壁和變送器探頭之間的電容的變化來(lái)導(dǎo)出它們之間的料位。對(duì)于非金屬的槽罐或這槽罐的側(cè)壁和探頭不平行的場(chǎng)合，必須要有接地參考點(diǎn)。
CRF2系列料位變送器有固定桿式或撓性管纜式兩種探頭，用于不同的應(yīng)用場(chǎng)合。零點(diǎn)和量程是直接按鍵校準(zhǔn)。訂購(gòu)時(shí)可按需要定制探頭的長(zhǎng)度。聚全氟乙丙烯(FEP) 覆膜的探頭耐腐蝕性能強(qiáng)。這種技術(shù)不會(huì)受到象手機(jī)，對(duì)講機(jī)或其它無(wú)線(xiàn)發(fā)射裝置等其它電磁信號(hào)的干擾。
CRF2 is a level transmitter providing a two-wire 4 to 20 mA output to indicate level of liquids, powders and bulk materials. State of the art sensing technology in the CRF2, using impulse RF admittance measurement provides excellent accuracy and stability. The CRF2 senses capacitance changes resulting from the height of the material in the tank between the probe and the tank wall. In non-metallic tanks or tanks that do not have the wall parallel to the probe a ground reference must be used.