Lafayette Instrument

Lafayette Instrument Company is the world leader in polygraph instrumentation, serving our customers since 1947 and supporting polygraph professionals since 1972.

Lafayette Instrument


The LX5000 computerized polygraph system records, stores, and analyzes physiological changes during a polygraph examination. The LX5000 system combines standard polygraph procedure with sophisticated state-of-the-art technology, including scoring algorithms and advanced reporting capabilities.  Nine 24-bit channels can be recorded at one time and the system can be expanded to support 18 channels. There is a 3-year warranty on the instrument and no software maintenance agreement required for updates.  Also available are a variety of movement sensors, photoelectric-plethysmograph (PLE) components, chairs, training and new examiner reference guides.

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Next AAPP Seminar

AAPP Seminar 2019
May 5 - 10, 2019
Reno, NV

About Us

AAPP Seminar - one of the largest polygraph training events organized annually. Every year we strive to keep you current with every innovation in the polygraph profession.

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For general information about the AAPP Seminar, including registration, please contact us at:

  • Email Us
  • 847-635-3980
  • 847-213-5556
  • 3223 Lake Ave
    Unit 15c-168
    Wilmette, IL 60091-1069