At this time, we have discontinued support of the PrefTest and our Chaperone Training Program. If you are looking for specific information regarding these items, please contact us directly.

PrefTest Pro Suite

About Us

Limestone Technologies is a credibility assessment solutions provider located in Kingston, Ontario. Our Polygraph systems are industry leading and internationally recognized as being feature rich, innovative, and reliable. Limestone Technologies Inc. is a division of Lafayette Instrument Company. Lafayette Instrument Company has over 70 years of experience engineering data acquisition and measurement instrumentation. Lafayette is positioned at the forefront of neuroscientific discovery, human evaluation, and credibility assessment.