BS 650 CT具(ju)有(you)(you)同軸探(tan)(tan)頭(tou)，定(ding)探(tan)(tan)針(zhen)(zhen)系(xi)數（0.1或0.01），同軸探(tan)(tan)針(zhen)(zhen)將預留之(zhi)間(jian)10KΩ至30MΩ的(de)電(dian)(dian)(dian)導率測量(liang)(liang)(liang)。外(wai)封(feng)套圍繞所述有(you)(you)源部(bu)分(fen)（中心纖芯）并(bing)進行測定(ding)，同時確保完美的(de)屏(ping)蔽接(jie)(jie)地。這些(xie)(xie)探(tan)(tan)頭(tou)都具(ju)有(you)(you)十分(fen)重(zhong)要(yao)的(de)機械剛度(du)。絕緣(yuan)是聚四氟乙烯和金屬部(bu)件，均采用(yong)不銹鋼316L。電(dian)(dian)(dian)池常數或系(xi)數是由(you)探(tan)(tan)頭(tou)實際(ji)測量(liang)(liang)(liang)的(de)值，并(bing)通過電(dian)(dian)(dian)導率或電(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)率表(biao)示(shi)的(de)值之(zhi)間(jian)的(de)比率。測量(liang)(liang)(liang)電(dian)(dian)(dian)纜(lan) - 電(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)提供了探(tan)(tan)針(zhen)(zhen)和電(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)率或電(dian)(dian)(dian)導率之(zhi)間(jian)的(de)連接(jie)(jie)，一些(xie)(xie)探(tan)(tan)頭(tou)直接(jie)(jie)傳遞到電(dian)(dian)(dian)纜(lan)出口。某些(xie)(xie)機型具(ju)有(you)(you)內置(zhi)溫度(du)補償（版本具(ju)有(you)(you)強制連接(jie)(jie)頭(tou)）。在(zai)其(qi)他情況下，采用(yong)外(wai)部(bu)補償類型的(de)Pt 100Ω。對于高電(dian)(dian)(dian)導率測量(liang)(liang)(liang)（即低(di)的(de)電(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)率），則有(you)(you)必要(yao)使用(yong)恒(heng)定(ding)探(tan)(tan)針(zhen)(zhen)1或10，BF 1200系(xi)列（DOC361-01）或編碼器環形傳感器（DOC 364-01）。