As The Teeth Go By

    Sept. 2, 2004
    A Hall-effect sensor integrated circuit and magnet combination provides a user-friendly solution for digital gear-tooth sensing and true zero-speed direction detection in two-wire applications.

    A singleshot molded-plastic package includes a samarium-cobalt magnet, a pole piece, and a Hall-effect IC. Units can be used in conjunction with a wide variety of gear shapes and sizes. Sensors are ideal for obtaining speed, direction, and diagnostic information using gear-tooth-based targets found in ABS and transmission applications.

    Allegro Microsystems,
    115 Northeast Cutoff, Box 15036, Worcester, MA 01615,
    (508) 853-5000, www.allegromicro.com

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