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RTFM數顯射頻(pin)導納(na)物位變送器 原(yuan)理&結構(gou) 基于射頻(pin)電(dian)(dian)(dian)容(rong)(rong)技(ji)術，將一個無(wu)線(xian)電(dian)(dian)(dian)頻(pin)率施加在探(tan)頭上，通(tong)過(guo)連續(xu)的(de)(de)分析，確(que)定由周圍(wei)環(huan)境(jing)造成(cheng)的(de)(de)影響。因所有(you)材(cai)(cai)料均具有(you)介(jie)電(dian)(dian)(dian)常(chang)數，而(er)且(qie)其電(dian)(dian)(dian)導率均不同(tong)于空氣(qi)，當探(tan)頭與被(bei)測介(jie)質(zhi)接(jie)觸時(shi)由于微(wei)小電(dian)(dian)(dian)容(rong)(rong)量(liang)偏(pian)移所反映的(de)(de)總阻抗發送變化。因為通(tong)電(dian)(dian)(dian)的(de)(de)探(tan)頭和容(rong)(rong)器壁構(gou)成(cheng)電(dian)(dian)(dian)容(rong)(rong)器的(de)(de)二塊極板(ban)，探(tan)頭的(de)(de)絕(jue)緣體(ti)和周圍(wei)的(de)(de)空氣(qi)成(cheng)為介(jie)電(dian)(dian)(dian)材(cai)(cai)料，當空氣(qi)（介(jie)電(dian)(dian)(dian)常(chang)數1）被(bei)任何其它材(cai)(cai)質(zhi)置換時(shi)，電(dian)(dian)(dian)容(rong)(rong)值的(de)(de)