From: jamie_ka1lpa@charter.net   
      
   In article , BobEngelhardt@comcast.net   
   says...   
   >   
   > An eBay listing for a electronic tachometer specifies that it's input   
   > can be a "wet contactor".  Is there a standard meaning for "wet contactor"?   
   >   
   > Thanks,   
   > Bob   
      
   it means the source for the tach can come from a live pulse source   
   elsewhere instead if using the a reference sournce from the tach unit to   
   a isolated switch.   
      
    Basically an external source that supplies its own power source to   
   generate an output reference signal   
      
    In the terms of Dry contacts, it means that the contacts can not be   
   shared with others reference sources on those termination points and   
   thus the two connections to the contact must be dedicated to the tach   
   unit. this also applies to sensors dedicated to the tach for use.   
      
      
    In the case of Wet contacts as for this subject, it means the tach can   
   use an electrical pulse from other sources and most of the time the   
   input as a wide range scale to allow this.   
      
    Picking off an existing inductive sensor that is powered from another   
   circuit is a good example. just combine the commons .   
      
   Jamie   
      
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