裝置采用電容式原理。電容式傳感器由內、外電極(相當于電容兩個極板)及電路部分組成。當油中混水或積水后，由于二者介電常數相差很大，則由內、外電極構成的電容值發生顯著變化。傳感器電路產生一穩幅高頻方波，當電容值發生變化，則方波頻率發生變化，經過對信號的處理放大比較，輸出相應的變送模擬量報警信號。                                         

    無活動部件,免維護,安裝方便,一種型號適用多種管徑要求.開關量連續可調,極低的壓力損失，有多種輸出功能可選擇。滿足不同用戶對自動化控制的需求。LED數碼顯示，按鍵設定菜單。                                                                                   

    油混水信號器用于監測水電站、火電廠及大型泵站油系統中的混水或積水量。當油箱、油管路中混水或積水即發出報警信號，提醒值班人員及時檢查系統，確保發電機組安全運行。技術參數                                                                           

●設定報警范圍：                            0~5%,0~10%,0~50%                                             

●材質：                            探頭：黃銅合金                                             

                            螺紋：黃銅合金                                             

●信號輸出：                            兩路開關量（常開or常閉）或模擬量信號                   

●連接方式：                            M27*2外螺紋（M20*1.5 G1/2可選）                          

●供電：                            24VDC 、110VAC 、220VAC                                              

●負載：                            5A（繼電器型）                                          

●空載電流：                            最大250mA                                            

●耗損電流：                            ＜60mA                                           

●測量精度：                            0.20%                                              

●初始化時間：                         約8s                                                

●耐壓范圍：                            16bar                                               

●介質溫度：                          0~100℃                                           

●電氣保護：                            反相，短路，過載保護                                                

●防護等級：                            IP65                                                

●重量：                            約1.8kg                                           

●探頭長度：                            100mm\150mm\按客戶要求特殊定制                            

FS66型                                                                                                                        

油混水變送器，適用介質：油基液體。最大工作壓力16bar.介質溫度0…100℃。電源：DC24V AC220V 。保護級別IP65.4~20mA模擬量+兩路開關量輸出,黃銅合金材質，LED數碼顯示，按鍵操作設定菜單。