音叉物位開關通過與被測介質接觸時音叉頻率或振幅的突然改變，智能電路對此進行檢測，并轉化為一個開關信號的原理達到限位的目的。E+H是音叉的首創(chuàng)者和業(yè)界的領導者，至今已有數(shù)百萬臺音叉在世界各地幾乎所有行業(yè)成功使用。

FTL20/20H-系列                                                 FTL260-系列
傳感器長度:35mm                                               溫度范圍:-40℃...+160℃(-40°F...+70°F) 
溫度范圍:-40...150℃                                          過程連接:1 NPT to ANSI B 1.20.1 316 SS 
耐        壓:-1...40 bar                                                             G1 A to DIN ISO 228/1,316SS
過程連接:1/2,3/4, 1                                                               R1 to DIN 2999 Part 1,316SS   
輸        出:AC,DC,ASi                                          電源:AC,19...253V,50/60Hz                        

FTL50\50H-系列                                                  FTL51/51H-系列
傳感器長度:65mm                                                傳感器長度:148...6000 mm
溫度范圍:-50...150℃                                           溫度范圍:-50...150℃
耐        壓:-1...63 bar                                             耐        壓:-1...63 bar
過程連接:3/4, 1, flanges                                        過程連接:3/4, 1, flanges  
輸       出:AC,DC,Relay,8/16mA,NAMUR,           輸        出:AC,DC,Relay,8/16 mA,NAMUR,PFM, 
                PFM,PROFIBUS                                                   PROFIBUS

FTL51C-系列                                                        FTM20-系列
傳感器長度:148...3000mm                                    傳感器長度:225 mm
溫度范圍:-50...150℃                                            溫度范圍:-40...150℃
耐        壓:-1...40bar                                               耐        壓:-1...25 bar
過程連接:Flanges                                                   密        度::from 200g/l,12lbs/ft3 
輸        出:AC,DC,Relay,8/16 mA,NAMUR,          輸出:DC,AC/DCrelay
                 PFM,PROFIBUS

FTM21-系列                                                           FTM50-系列
傳感器長度:500, 1000, 2000 mm                           傳感器長度:145,200mm
溫度范圍:-40...150℃                                             溫度范圍:-50...150℃
耐        壓:-1...25 bar                                               耐        壓:-1...25bar
密        度::from 200 g/l,12lbs/ft3                              密        度::from 8 g/l/0.6 lbs/ft3  
輸        出:DC,AC/DCrelay                                      輸        出:AC,DC,AC/DC  relay,8/16mA,     

FTM51-系列                                                           FTM52-系列
傳感器長度:300...6000 mm                                    傳感器長度:750...20000mm
溫度范圍:-50...150 ℃                                            溫度范圍:-40...80℃
耐        壓:-1...25 bar                                               耐        壓:-1...6 bar
密        度::from 8 g/l / 0.6 lbs/ft3                              密        度::from 8 g/l/0.6 lbs/ft3 
輸        出:AC, DC, AC/DC relay, 8/16 mA,            輸        出:AC, DC,AC/DC relay,8/16mA, 
                 NAMUR, PFM                                                        NAMUR,PFM