We use a couple of different types but this is the only one
          I can find any vendor name on.  Prime controls ds3400
          series.  It is simple in operation: calibrate using a core
          from the run and thats it, whenever the resistance changes
          it calls out and sets off an alarm.  Hope this helps, let me
          know if there is any other info you need.

                                                  Blaine Orr
                                                Sr. Manufacturing
                                                  Supervisor

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