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Ferrous Target Sensors For Counting

Direction sensitive counting of rotational or linear moving steel targets can be accomplished with the following types of sensors.

  • Quadrature Target Tracker Sensors output two out of phase digital square wave pulses. Comparing which output detects the target first resolves direction.
  • Speed and Direction Target Tracker Sensors output speed pulses on one channel and a second output that switches dependent on direction of movement. NOTE: If the direction of movement changes while the sensor is over a target, it may not register the direction change until the next target passes the sensor. For long term, guaranteed accurate count we recommend the Quadrature Target Tracker Sensors.

Ferrous Quadrature and Speed/Direction Sensors are capable of detecting the following targets:

  • Spur Gears, Face Gears, and Rack Gears
  • Tone wheels and tone rings
  • Holes in Steel objects such as rings, discs, pulleys, and steel plates
  • Bolt heads, pins, and other steel protrusions
  • Shaft Keys, keyways and holes in shafts
  • Steel inserts mounted in non ferrous discs and plates
  • Cam shafts and crank shafts
  • For more information about our ferrous target tracking quadrature and speed/direction sensors such as why we request the target pitch, or to learn more about custom target design, refer to our Application Notes.

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