Model 256 Pulser Discs are constructed of PVC and aluminum (256-A) and can be used with any Electro-Sensors Hall-effect or Magneto Resistive Sensors. These discs are designed with magnets of alternating polarity (N-S-N-S) embedded in the face of the disc. The end of the shaft to be monitored is center drilled and tapped and the disc is mounted with a machine screw and lock washer. The magnets serve as targets for Hall-effect sensors, which switch as a result of exposure to the changing magnetic poles. Steel targets can be substituted for magnets on aluminum or PVC discs for use with proximity sensors. Model 256 is a 2.5 inch PVC disc with 8 face-mounted magnets. The 256 is standard in M5000 & M5000T speed switch systems. Model 256-A is a 2.5 inch aluminum disc with 8 face-mounted magnets
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