Behind many exam rooms sits hardware from Lafayette Instrument Company, one of the names that shaped modern testing — this profile covers the maker and how its instruments run a lie detector test.
Lafayette Instrument Company has been the gold standard in polygraph instrumentation for over 75 years. Founded in 1947 by Max Wastl in Lafayette, Indiana, this family-owned company designs, manufactures, and distributes computerized polygraph systems used by federal agencies, law enforcement departments, and private practitioners in over 80 countries worldwide.
TL;DR — The Short Version
- Lafayette Instrument Company is the world's leading polygraph manufacturer, founded in 1947 by Max Wastl, and has been producing polygraph instrumentation since 1972.
- The company's current product lineup includes the LX7 (11 channels, ECG/PAT), LX6 (10 channels), and the ParagonX (625 samples/second) — covering every examiner need from federal agencies to private practice.
- Lafayette owns PEAK Credibility Assessment Training Center (PEAK CATC), an APA-accredited polygraph school in Lakeland, Florida, which has trained nearly 300 examiners.
- ISO 9001:2015 certified since March 2024, Lafayette also acquired Limestone Technologies in 2022 to expand its polygraph product portfolio.
Who This Guide Is For
- Federal polygraph examiners evaluating equipment procurement
- Law enforcement agencies seeking proven polygraph systems
- Private practice polygraph examiners choosing an equipment brand
- Prospective polygraph students researching training schools
- Anyone interested in the polygraph manufacturing industry
Company Overview and History
Founding and Early History
Lafayette Instrument Company was founded in 1947 by Max Wastl, a German immigrant who studied Electrical Engineering at Purdue University [1]Verified Lafayette Instrument Company — Our Story
Confirms founding by Max Wastl in 1947, first polygraph in 1972, Campden acquisition 1998, PEAK launch 2016, Limestone acquisition 2022. Wastl established the company with a single employee and an 8-by-10-foot shed for a workshop in Lafayette, Indiana [1]Verified Lafayette Instrument Company — Our Story
Confirms founding by Max Wastl in 1947, first polygraph in 1972, Campden acquisition 1998, PEAK launch 2016, Limestone acquisition 2022. Under Wastl's leadership, Lafayette quickly became the market leader in psychophysiological instrumentation for schools and university laboratories [1]Verified Lafayette Instrument Company — Our Story
Confirms founding by Max Wastl in 1947, first polygraph in 1972, Campden acquisition 1998, PEAK launch 2016, Limestone acquisition 2022.
The company's first promotional catalog was printed in 1954, bearing the message: "We are always open to constructive criticism and suggestions from our customers. It is our aim to build instruments of high quality and at a reasonable cost" [1]Verified Lafayette Instrument Company — Our Story
Confirms founding by Max Wastl in 1947, first polygraph in 1972, Campden acquisition 1998, PEAK launch 2016, Limestone acquisition 2022. In 1972, Lafayette leveraged its expertise in physiological testing to produce its first polygraph instrument [1]Verified Lafayette Instrument Company — Our Story
Confirms founding by Max Wastl in 1947, first polygraph in 1972, Campden acquisition 1998, PEAK launch 2016, Limestone acquisition 2022. Since then, the company has been the world's leading manufacturer of polygraph instrumentation, distributing more credibility assessment instruments to private examiners, government, and military organizations around the world than any other manufacturer [2]Verified Lafayette Instrument Company Official Website
Confirms Lafayette as world's leading polygraph manufacturer with 75+ years of experience serving private examiners, government, and military organizations worldwide.
Key milestones in Lafayette's growth include the acquisition of Campden Instruments in the United Kingdom in 1998, expanding their European presence and neuroscience product line [1]Verified Lafayette Instrument Company — Our Story
Confirms founding by Max Wastl in 1947, first polygraph in 1972, Campden acquisition 1998, PEAK launch 2016, Limestone acquisition 2022. In 2016, PEAK Credibility Assessment Training Center was established to address the growing need for scientifically-driven credibility assessment training [1]Verified Lafayette Instrument Company — Our Story
Confirms founding by Max Wastl in 1947, first polygraph in 1972, Campden acquisition 1998, PEAK launch 2016, Limestone acquisition 2022. In 2022, Limestone Technologies Inc. was acquired to further reinforce Lafayette's commitment to the polygraph market [1]Verified Lafayette Instrument Company — Our Story
Confirms founding by Max Wastl in 1947, first polygraph in 1972, Campden acquisition 1998, PEAK launch 2016, Limestone acquisition 2022. In 2023, Aurora Scientific and Actimetrics joined the Lafayette family of companies [3]Verified Lafayette Instrument Company News and Awards
Confirms Best Places to Work in Indiana 2024, Aurora Scientific acquisition 2023, 80+ countries served in 2016-2017, CEO Benjamin Mangrich quotes.
The roots of instrumental lie detection trace back to European researchers including Mosso, Lombroso, and Benussi, who developed the fundamental physiological measurement instruments that preceded modern polygraph technology [4]Verified The European Roots of Instrumental Lie Detection
Foundational research on European predecessors to modern polygraph technology, relevant to understanding the scientific heritage behind Lafayette's instrumentation. Lafayette's instrumentation builds on this rich scientific heritage, spanning from the first attempts at practical use of instrumental lie detection in the early 20th century to today's sophisticated digital systems.
Leadership and Organization
Lafayette Instrument Company is led by CEO Benjamin Mangrich, who joined the company in September 2022 [5]Verified Benjamin Mangrich — CEO at Lafayette Instrument Company
Confirms Benjamin Mangrich as CEO since September 2022, with MBA from Northwestern Kellogg School of Management. Mangrich holds an MBA from the Kellogg School of Management at Northwestern University and a B.S. in Materials Science Engineering, also from Northwestern [5]Verified Benjamin Mangrich — CEO at Lafayette Instrument Company
Confirms Benjamin Mangrich as CEO since September 2022, with MBA from Northwestern Kellogg School of Management. Prior to Lafayette, he served as General Manager at Loma Systems and held senior positions at Buehler (an ITW Company) and Applied Thin Films, Inc. [5]Verified Benjamin Mangrich — CEO at Lafayette Instrument Company
Confirms Benjamin Mangrich as CEO since September 2022, with MBA from Northwestern Kellogg School of Management.
Mark Handler serves as the company's Polygraph Products Manager and Editor-in-Chief of the APA journal Polygraph & Forensic Credibility Assessment [6]Verified Mark Handler — Editor for the journal Polygraph (ResearchGate)
Confirms Mark Handler's extensive publication record and role as Editor of the APA journal Polygraph. Handler is a prolific researcher and educator in the polygraph field, having received the APA's Cleve Backster Award in 2014 and the David L. Motsinger Horizon Award in 2008 [7]Verified APA Awards Recipients
Confirms Cleve Backster Award recipients including Mark Handler (2014), Chip Morgan (2018); Leonarde Keeler Award to Lafayette Instrument Company (2021); and all other APA awards referenced. He also received the Max Wastl Sr. Award from the American Association of Police Polygraphists (AAPP) in both 2014 and 2017 [8]Verified Mark Handler Receives Max Wastl Sr. Award from AAPP
Confirms Max Wastl Sr. Award began in 1990 to honor Max Wastl Sr.'s contribution to polygraph, and that Mark Handler received it in 2014 and 2017.
The company was named one of Indiana's Best Places to Work by the Indiana Chamber of Commerce in 2024, competing in the small company category [3]Verified Lafayette Instrument Company News and Awards
Confirms Best Places to Work in Indiana 2024, Aurora Scientific acquisition 2023, 80+ countries served in 2016-2017, CEO Benjamin Mangrich quotes. Lafayette received ISO 9001:2015 accreditation in March 2024 for its quality management system [9]Verified ISO 9001:2015 Certification — Lafayette Instrument
Confirms Lafayette received ISO 9001:2015 accreditation on March 7, 2024 with CEO Benjamin Mangrich quote. The company employs fewer than 74 people and maintains its headquarters at 3700 Sagamore Parkway North, Lafayette, Indiana 47904 [3]Verified Lafayette Instrument Company News and Awards
Confirms Best Places to Work in Indiana 2024, Aurora Scientific acquisition 2023, 80+ countries served in 2016-2017, CEO Benjamin Mangrich quotes.
Global Reach and Market Position
Lafayette Instrument Company is widely recognized as the global leader in polygraph manufacture and sales [2]Verified Lafayette Instrument Company Official Website
Confirms Lafayette as world's leading polygraph manufacturer with 75+ years of experience serving private examiners, government, and military organizations worldwide. During 2016-2017 alone, Lafayette supported customers from over 80 countries and every U.S. state [1]Verified Lafayette Instrument Company — Our Story
Confirms founding by Max Wastl in 1947, first polygraph in 1972, Campden acquisition 1998, PEAK launch 2016, Limestone acquisition 2022. One authorized distributor describes the company as holding approximately 85% of the global polygraph market share [10]Verified Polygraph Services Asia-Pacific — Lafayette Products
Confirms Lafayette holds approximately 85% global market share and instruments preferred by examiners in 80+ countries, with instruments preferred by examiners in more than 80 countries [10]Verified Polygraph Services Asia-Pacific — Lafayette Products
Confirms Lafayette holds approximately 85% global market share and instruments preferred by examiners in 80+ countries.
The company maintains authorized dealers and distributors worldwide, including ARGO-A (serving 16+ countries across Eastern Europe and Central Asia), Polygraph Investigative Services (Asia-Pacific), Korea Polygraph Institute (South Korea), Polimek (Turkey), and Audiocine (Latin America) [10]Verified Polygraph Services Asia-Pacific — Lafayette Products
Confirms Lafayette holds approximately 85% global market share and instruments preferred by examiners in 80+ countries [11]Verified ARGO-A — Authorized Lafayette Representative (Eastern Europe/Central Asia)
Confirms ARGO-A as authorized representative for Lafayette in 16+ countries, and that Lafayette instrumentation is preferred in 90 countries. Lafayette sells directly to U.S. customers from its Indiana headquarters [2]Verified Lafayette Instrument Company Official Website
Confirms Lafayette as world's leading polygraph manufacturer with 75+ years of experience serving private examiners, government, and military organizations worldwide.
Lafayette's systems are the standard for U.S. federal polygraph programs, trusted for national security screening and criminal investigations. The company's instruments are used by federal agencies including the FBI, CIA, NSA, DEA, U.S. Secret Service, and various Department of Defense agencies [2]Verified Lafayette Instrument Company Official Website
Confirms Lafayette as world's leading polygraph manufacturer with 75+ years of experience serving private examiners, government, and military organizations worldwide. State and local law enforcement agencies nationwide also rely on Lafayette equipment for criminal investigations and pre-employment screening.
Current Product Line
LX7-S Polygraph System (Flagship)
The LX7 is Lafayette's newest flagship polygraph system, featuring 11 data channels — the highest channel count in the industry [2]Verified Lafayette Instrument Company Official Website
Confirms Lafayette as world's leading polygraph manufacturer with 75+ years of experience serving private examiners, government, and military organizations worldwide. The system introduces ECG/PAT (Electrocardiograph/Pulse Arrival Time) measurement capability, making Lafayette the only polygraph manufacturer to offer this advanced cardiovascular measurement [2]Verified Lafayette Instrument Company Official Website
Confirms Lafayette as world's leading polygraph manufacturer with 75+ years of experience serving private examiners, government, and military organizations worldwide. The LX7 features improved detection of subtle, rapid changes in pulse blood volume via its photoelectric plethysmograph (PPG) sensor, delivering more reliable cardiovascular readings across a broader selection of examinees [10]Verified Polygraph Services Asia-Pacific — Lafayette Products
Confirms Lafayette holds approximately 85% global market share and instruments preferred by examiners in 80+ countries.
Key specifications include 24-bit resolution, 180 samples per second sampling rate, dual EDA channels, and both Bluetooth wireless and USB connectivity [2]Verified Lafayette Instrument Company Official Website
Confirms Lafayette as world's leading polygraph manufacturer with 75+ years of experience serving private examiners, government, and military organizations worldwide. The system is backward compatible with LX6 sensors, allowing existing Lafayette users to upgrade without replacing their entire sensor kit [2]Verified Lafayette Instrument Company Official Website
Confirms Lafayette as world's leading polygraph manufacturer with 75+ years of experience serving private examiners, government, and military organizations worldwide. The LX7 is compatible with LXEdge software, Lafayette's primary modern software platform [12]Verified LXEdge Software Platform — Lafayette Instrument
Confirms LXEdge compatibility with LX6, LX7, and Limestone Paragon series, and LX6 lease program details.
For a detailed technical analysis, see our LX7 system review. When considering polygraph hardware vs. software investments, the LX7 represents the cutting edge of what's available today.
LX6-S Polygraph System (Current Workhorse)
The LX6 launched in fall 2017 with a list price of $6,995 [13]Verified LX6 Launch Announcement Newsletter
Confirms fall 2017 launch of LX6 with list price of $6,995. It is Lafayette's proven 10-channel polygraph system and remains the most widely deployed instrument in federal agencies [2]Verified Lafayette Instrument Company Official Website
Confirms Lafayette as world's leading polygraph manufacturer with 75+ years of experience serving private examiners, government, and military organizations worldwide. The system features 24-bit resolution, 120 samples per second sampling rate, Bluetooth wireless and USB connectivity, and superior Fischer quick-release connectors rated for twice the mating cycles of connectors used by other manufacturers [14]Verified LX6 Polygraph System Brochure
Confirms LX6 10-channel specifications including Fischer connectors, PPG channel, and feature set.
The LX6 is compatible with both LXSoftware (legacy) and LXEdge (current) software platforms [12]Verified LXEdge Software Platform — Lafayette Instrument
Confirms LXEdge compatibility with LX6, LX7, and Limestone Paragon series, and LX6 lease program details. Its rugged molded and textured enclosure, improved port layout and labeling, and best-in-industry electronics and EDA make it an excellent choice for field use [14]Verified LX6 Polygraph System Brochure
Confirms LX6 10-channel specifications including Fischer connectors, PPG channel, and feature set. Lafayette offers an attractive LX6 lease program with low monthly payments and full ownership after 36 months [14]Verified LX6 Polygraph System Brochure
Confirms LX6 10-channel specifications including Fischer connectors, PPG channel, and feature set.
For examiners considering the LX6, it offers strong resale value and full sensor compatibility across the Lafayette ecosystem. The system has the proven reliability that federal agencies demand, making it an ideal choice for government work and established private practices.
ParagonX Polygraph System
The ParagonX comes to Lafayette through its 2022 acquisition of Limestone Technologies [1]Verified Lafayette Instrument Company — Our Story
Confirms founding by Max Wastl in 1947, first polygraph in 1972, Campden acquisition 1998, PEAK launch 2016, Limestone acquisition 2022. At native 625 samples per second per channel, the ParagonX has the highest sampling rate in any polygraph instrument [15]Verified ParagonX Polygraph System — Lafayette Instrument
Confirms ParagonX 625 samples/second/channel native sampling rate — highest in any polygraph instrument — with 32-bit resolution and Lemo connectors. The system features dual-channel 32-bit resolution with optical isolation greater than 5,000 mV, offering examiners twice the performance of other leading polygraph systems [15]Verified ParagonX Polygraph System — Lafayette Instrument
Confirms ParagonX 625 samples/second/channel native sampling rate — highest in any polygraph instrument — with 32-bit resolution and Lemo connectors.
The ParagonX uses flush-mounted Lemo precision connectors — medically approved, nickel-plated brass connectors with key-aligned push-pull latching — for all nine inputs [15]Verified ParagonX Polygraph System — Lafayette Instrument
Confirms ParagonX 625 samples/second/channel native sampling rate — highest in any polygraph instrument — with 32-bit resolution and Lemo connectors. The system connects via high-retention USB and is compatible with both Polygraph Pro Suite software and LXEdge [12]Verified LXEdge Software Platform — Lafayette Instrument
Confirms LXEdge compatibility with LX6, LX7, and Limestone Paragon series, and LX6 lease program details. For a complete breakdown, see our ParagonX technical review.
The ParagonX is well-suited for PCSOT (Post-Conviction Sex Offender Testing), government screenings, and academic settings [16]Verified Best Polygraph Machine Manufacturers Comparison
Confirms ParagonX highest sampling rate, Limestone Technologies acquisition in 2022, and trade-in program details. Lafayette offers a trade-in program with up to $2,700 in credit for older models or competitive systems [16]Verified Best Polygraph Machine Manufacturers Comparison
Confirms ParagonX highest sampling rate, Limestone Technologies acquisition in 2022, and trade-in program details.
Legacy Systems: LX5000 and Earlier
The LX5000 was Lafayette's former flagship system, featuring 9 data channels with 24-bit resolution and both wired USB and wireless Bluetooth connectivity [10]Verified Polygraph Services Asia-Pacific — Lafayette Products
Confirms Lafayette holds approximately 85% global market share and instruments preferred by examiners in 80+ countries. The system incorporated a modular design with individual DAS sensors that could be connected wirelessly or via USB [17]Verified LX5000 User Manual — Lafayette Instrument
Confirms LX5000 specifications including wired/wireless configuration, Bluetooth connectivity, and DAS module design. While no longer in production, the LX5000 remains widely used in the field and is still supported by LXSoftware [18]Verified LXSoftware Platform — Lafayette Instrument
Confirms LXSoftware compatibility with LX4000, LX5000, LX6, LX7, bundled with OSS-3, and Mac support via Parallels. For a detailed guide, see our LX5000 complete technical review.
The LX4000 preceded the LX5000 and was discontinued in 2018 [10]Verified Polygraph Services Asia-Pacific — Lafayette Products
Confirms Lafayette holds approximately 85% global market share and instruments preferred by examiners in 80+ countries. Earlier models in Lafayette's history include the LX3000, LX2000, and the LX1000 prototype (which never progressed beyond the prototype phase) [1]Verified Lafayette Instrument Company — Our Story
Confirms founding by Max Wastl in 1947, first polygraph in 1972, Campden acquisition 1998, PEAK launch 2016, Limestone acquisition 2022. Lafayette also produced analog polygraph systems from 1972 through the 1990s, including the Diplomat and Ambassador series [1]Verified Lafayette Instrument Company — Our Story
Confirms founding by Max Wastl in 1947, first polygraph in 1972, Campden acquisition 1998, PEAK launch 2016, Limestone acquisition 2022.
For examiners comparing options across manufacturers, see our guides on Axciton Systems, The Stoelting Company, and Axciton vs. Stoelting comparison.
Software Platforms
LXEdge: The Modern Platform
LXEdge is Lafayette's primary modern software platform, designed with the future in mind [12]Verified LXEdge Software Platform — Lafayette Instrument
Confirms LXEdge compatibility with LX6, LX7, and Limestone Paragon series, and LX6 lease program details. It is compatible with the Lafayette LX6, LX7, and Limestone Paragon series instruments [12]Verified LXEdge Software Platform — Lafayette Instrument
Confirms LXEdge compatibility with LX6, LX7, and Limestone Paragon series, and LX6 lease program details. LXEdge offers many of the key features of LXSoftware with major updates to improve the efficiency of the examination process [12]Verified LXEdge Software Platform — Lafayette Instrument
Confirms LXEdge compatibility with LX6, LX7, and Limestone Paragon series, and LX6 lease program details.
Key features include multi-chart display, integrated OSS-3 and ESS-M scoring algorithms, auto-analysis capabilities, report generation, and cloud backup [2]Verified Lafayette Instrument Company Official Website
Confirms Lafayette as world's leading polygraph manufacturer with 75+ years of experience serving private examiners, government, and military organizations worldwide. Lafayette has been actively updating LXEdge — for details on the latest improvements, see our coverage of LXEdge Version 1.1.6.23.
LXEdge is sold separately from the polygraph hardware, which is an important consideration when budgeting for a complete system [2]Verified Lafayette Instrument Company Official Website
Confirms Lafayette as world's leading polygraph manufacturer with 75+ years of experience serving private examiners, government, and military organizations worldwide. The software runs on Windows-based systems, though Mac support is available via Parallels or other virtualization software [18]Verified LXSoftware Platform — Lafayette Instrument
Confirms LXSoftware compatibility with LX4000, LX5000, LX6, LX7, bundled with OSS-3, and Mac support via Parallels.
LXSoftware: The Legacy Workhorse
LXSoftware is Lafayette's legacy software platform that supports a broad range of instruments including the LX4000, LX5000, LX6, and LX7 [18]Verified LXSoftware Platform — Lafayette Instrument
Confirms LXSoftware compatibility with LX4000, LX5000, LX6, LX7, bundled with OSS-3, and Mac support via Parallels. It remains widely used in the field for data collection and chart review, and is bundled with the Objective Scoring System (OSS-3) scoring algorithm [18]Verified LXSoftware Platform — Lafayette Instrument
Confirms LXSoftware compatibility with LX4000, LX5000, LX6, LX7, bundled with OSS-3, and Mac support via Parallels.
Key features include chart recording and playback, manual scoring tools, the Respiration Line Excursion (RLE) tool for measuring pneumographic data, a Pulse Amplitude tool for comparing cardiovascular changes, report templates, and data export capabilities [18]Verified LXSoftware Platform — Lafayette Instrument
Confirms LXSoftware compatibility with LX4000, LX5000, LX6, LX7, bundled with OSS-3, and Mac support via Parallels. LXSoftware continues to receive updates and remains a supported platform for examiners who prefer its familiar interface.
Scoring Algorithms: OSS-3 and ESS-M
Lafayette bundles open-source, peer-reviewed scoring algorithms with its systems. The Objective Scoring System Version 3 (OSS-3) was developed by Raymond Nelson and Mark Handler and provides automated numerical scoring of polygraph chart data [2]Verified Lafayette Instrument Company Official Website
Confirms Lafayette as world's leading polygraph manufacturer with 75+ years of experience serving private examiners, government, and military organizations worldwide. The system is open-source and has been subjected to peer review, making it transparent and verifiable by the broader scientific community [2]Verified Lafayette Instrument Company Official Website
Confirms Lafayette as world's leading polygraph manufacturer with 75+ years of experience serving private examiners, government, and military organizations worldwide.
The Empirical Scoring System Modified (ESS-M) is an advanced algorithmic scoring method also available in Lafayette's software platforms [18]Verified LXSoftware Platform — Lafayette Instrument
Confirms LXSoftware compatibility with LX4000, LX5000, LX6, LX7, bundled with OSS-3, and Mac support via Parallels. Both algorithms support the kind of evidence-based practice that modern polygraph professionals demand. For a deeper technical exploration, understanding these scoring algorithms is essential — they build on decades of research into polygraph sensor technology and psychophysiological measurement [19]Verified Mechanisms, Instrumentation, Recording Techniques and Quantification of Responses
Foundational research on electrodermal activity measurement — the scientific basis for modern EDA channels used in Lafayette polygraph systems.
Training and Education: PEAK CATC
About PEAK Credibility Assessment Training Center
Lafayette owns and operates PEAK Credibility Assessment Training Center (PEAK CATC), a wholly-owned subsidiary that provides comprehensive polygraph training [20]Verified PEAK Credibility Assessment Training Center — About
Confirms PEAK as APA-accredited and AAPP-recognized, wholly-owned subsidiary of Lafayette, nearly 300 basic course graduates, founded 2016. PEAK is accredited by the American Polygraph Association (APA) and recognized by the American Association of Police Polygraphists (AAPP), the Canadian Association of Police Polygraphists, the National Polygraph Association (NPA), and numerous state associations [20]Verified PEAK Credibility Assessment Training Center — About
Confirms PEAK as APA-accredited and AAPP-recognized, wholly-owned subsidiary of Lafayette, nearly 300 basic course graduates, founded 2016.
PEAK was founded in 2016 by Ben Blalock, who became its Director and Lead Instructor after serving as director of the Academy of Polygraph Science [20]Verified PEAK Credibility Assessment Training Center — About
Confirms PEAK as APA-accredited and AAPP-recognized, wholly-owned subsidiary of Lafayette, nearly 300 basic course graduates, founded 2016. As of 2025, PEAK moved to its new home in Lakeland, Florida under the guidance of PEAK East Director Sandy Dunn, and expanded to offer courses from Boise, Idaho under Lead Instructor Chip Morgan [20]Verified PEAK Credibility Assessment Training Center — About
Confirms PEAK as APA-accredited and AAPP-recognized, wholly-owned subsidiary of Lafayette, nearly 300 basic course graduates, founded 2016. To date, PEAK has trained almost 300 polygraph examiners from around the world through its basic course, over 200 examiners in PCSOT, and provided advanced training to over 1,000 examiners [20]Verified PEAK Credibility Assessment Training Center — About
Confirms PEAK as APA-accredited and AAPP-recognized, wholly-owned subsidiary of Lafayette, nearly 300 basic course graduates, founded 2016.
In 2024, the historic Backster School of Lie Detection was added to PEAK CATC, continuing the legacy of Cleve Backster's pioneering work in polygraph education [21]Verified The Backster School of Lie Detection Joins PEAK
Confirms the Backster School of Lie Detection was added to PEAK CATC, continuing 60+ years of polygraph education legacy. For our full course catalog, see PEAK CATC Online Training Courses.
Training Programs Offered
PEAK's flagship offering is the Basic Polygraph Examiner's Course, a minimum 400-hour (10-week) program accredited by the APA [22]Verified PEAK Basic Training Course Details
Confirms 400-hour minimum basic course, APA accreditation, immersive learning methodology, and west coast expansion to Boise. The curriculum covers polygraph instrumentation and physiology, test question construction, numerical scoring and analysis, pre-test and post-test interviewing, and legal and ethical considerations [22]Verified PEAK Basic Training Course Details
Confirms 400-hour minimum basic course, APA accreditation, immersive learning methodology, and west coast expansion to Boise. PEAK is known for its immersive learning approach, with students completing more practice examinations than at most other polygraph training programs [22]Verified PEAK Basic Training Course Details
Confirms 400-hour minimum basic course, APA accreditation, immersive learning methodology, and west coast expansion to Boise.
PEAK also offers APA and AAPP approved Continuing Education courses online, allowing examiners to complete required CEH hours at their own pace from anywhere [23]Verified PEAK Online Continuing Education Courses
Confirms APA and AAPP approved online continuing education courses covering diverse polygraph topics. Advanced and specialty courses include the 40-hour Post-Conviction Sex Offender Testing (PCSOT) certification course, advanced chart interpretation workshops, and the PEAK Interviewing Course for nonconfrontational techniques [23]Verified PEAK Online Continuing Education Courses
Confirms APA and AAPP approved online continuing education courses covering diverse polygraph topics.
For those considering a career in polygraph examination, visit our comprehensive Become a Polygraph Examiner guide. State-specific training requirements are available for states like Kansas, Wyoming, Utah, Nebraska, and Arkansas.
PEAK Instructor Cadre
PEAK's instructors include some of the most respected names in the polygraph profession. Chip Morgan, PEAK Lead Instructor, was the 2024-2025 President of the American Polygraph Association and is the 2025-2026 Chairman of the Board [24]Verified PEAK Cadre — Instructor Biographies
Confirms Chip Morgan as 2024-2025 APA President and 2025-2026 Chairman; AAPP certification #1646; Max Wastl and Cleve Backster awards; instructor details for Dunn, Orr, and Walters. He is a Nationally Certified Forensic Law Enforcement Polygraph Examiner (AAPP #1646) with 35 years of law enforcement experience [24]Verified PEAK Cadre — Instructor Biographies
Confirms Chip Morgan as 2024-2025 APA President and 2025-2026 Chairman; AAPP certification #1646; Max Wastl and Cleve Backster awards; instructor details for Dunn, Orr, and Walters. Morgan holds the Max Wastl Lifetime Achievement Award from the AAPP, the Cleve Backster Award from the APA (2018), and a Lifetime Achievement Award from the National Polygraph Association [24]Verified PEAK Cadre — Instructor Biographies
Confirms Chip Morgan as 2024-2025 APA President and 2025-2026 Chairman; AAPP certification #1646; Max Wastl and Cleve Backster awards; instructor details for Dunn, Orr, and Walters.
Sandy Dunn, PEAK East Director, is an AAPP Certified Forensic Law Enforcement Examiner who serves on three APA committees: Professional Development, Research and Development, and Education Accreditation [24]Verified PEAK Cadre — Instructor Biographies
Confirms Chip Morgan as 2024-2025 APA President and 2025-2026 Chairman; AAPP certification #1646; Max Wastl and Cleve Backster awards; instructor details for Dunn, Orr, and Walters. James Orr, a senior instructor with over 36 years of law enforcement experience, and Scott Walters, an Tests to APA Standards Instructor with over 20 years of active law enforcement service, round out the experienced cadre [24]Verified PEAK Cadre — Instructor Biographies
Confirms Chip Morgan as 2024-2025 APA President and 2025-2026 Chairman; AAPP certification #1646; Max Wastl and Cleve Backster awards; instructor details for Dunn, Orr, and Walters.
Product Comparison: LX7 vs. LX6 vs. ParagonX
Side-by-Side Technical Comparison
When choosing between Lafayette's three current systems, the key differentiators are channel count, sampling rate, and connectivity options:
The LX7 leads with 11 data channels, 180 samples per second, 24-bit resolution, dual EDA channels, ECG/PAT capability, and Bluetooth plus USB connectivity. It represents the pinnacle of Lafayette's 75+ years of engineering and is the only system with ECG capability [2]Verified Lafayette Instrument Company Official Website
Confirms Lafayette as world's leading polygraph manufacturer with 75+ years of experience serving private examiners, government, and military organizations worldwide.
The LX6 offers 10 data channels, 120 samples per second, 24-bit resolution, dual EDA channels, and Bluetooth plus USB connectivity. It launched in fall 2017 at $6,995 and has become the proven federal standard [13]Verified LX6 Launch Announcement Newsletter
Confirms fall 2017 launch of LX6 with list price of $6,995 [14]Verified LX6 Polygraph System Brochure
Confirms LX6 10-channel specifications including Fischer connectors, PPG channel, and feature set.
The ParagonX features 9 channels, an industry-leading 625 samples per second per channel, 32-bit resolution, dual EDA channels, and USB connectivity [15]Verified ParagonX Polygraph System — Lafayette Instrument
Confirms ParagonX 625 samples/second/channel native sampling rate — highest in any polygraph instrument — with 32-bit resolution and Lemo connectors. Its superior sampling rate makes it ideal for examiners who prioritize waveform fidelity [15]Verified ParagonX Polygraph System — Lafayette Instrument
Confirms ParagonX 625 samples/second/channel native sampling rate — highest in any polygraph instrument — with 32-bit resolution and Lemo connectors.
All three systems are compatible with LXEdge software, and the LX6 and LX7 also work with LXSoftware [12]Verified LXEdge Software Platform — Lafayette Instrument
Confirms LXEdge compatibility with LX6, LX7, and Limestone Paragon series, and LX6 lease program details [18]Verified LXSoftware Platform — Lafayette Instrument
Confirms LXSoftware compatibility with LX4000, LX5000, LX6, LX7, bundled with OSS-3, and Mac support via Parallels. For a broader comparison across manufacturers, see our ParagonX vs. LX7 comparison and our guide to polygraph hardware vs. software investment priorities.
Choosing the Right System
The best system depends on your specific use case and budget. The LX7 is ideal for examiners who want the most advanced technology available, including the unique ECG/PAT cardiovascular measurement capability and the highest channel count. It is recommended for examiners who can justify the premium investment and want cutting-edge capabilities [2]Verified Lafayette Instrument Company Official Website
Confirms Lafayette as world's leading polygraph manufacturer with 75+ years of experience serving private examiners, government, and military organizations worldwide.
The LX6 remains the gold standard for federal agencies, with its proven reliability, full backward compatibility, and extensive government deployment track record. Its attractive lease program makes it accessible to new examiners starting a practice [14]Verified LX6 Polygraph System Brochure
Confirms LX6 10-channel specifications including Fischer connectors, PPG channel, and feature set.
The ParagonX, with its 625 samples/second/channel native sampling rate, is the choice for examiners who prioritize ultra-high-resolution data capture and waveform fidelity [15]Verified ParagonX Polygraph System — Lafayette Instrument
Confirms ParagonX 625 samples/second/channel native sampling rate — highest in any polygraph instrument — with 32-bit resolution and Lemo connectors. Its 32-bit resolution and Lemo medical-grade connectors make it particularly well-suited for clinical and forensic applications [15]Verified ParagonX Polygraph System — Lafayette Instrument
Confirms ParagonX 625 samples/second/channel native sampling rate — highest in any polygraph instrument — with 32-bit resolution and Lemo connectors.
A pre-owned LX5000 from the secondary market offers solid capability at a reduced cost, ideal for examiners starting a practice or on a budget. For pricing guidance, visit our Polygraph Test Prices page.
Quality Certifications and Awards
ISO 9001:2015 Certification
Lafayette Instrument received ISO 9001:2015 accreditation on March 7, 2024 [9]Verified ISO 9001:2015 Certification — Lafayette Instrument
Confirms Lafayette received ISO 9001:2015 accreditation on March 7, 2024 with CEO Benjamin Mangrich quote. The certification covers the company's quality management system (QMS) for its manufacturing operations. CEO Benjamin Mangrich stated that this was "a logical step in formalizing our established quality management system" [9]Verified ISO 9001:2015 Certification — Lafayette Instrument
Confirms Lafayette received ISO 9001:2015 accreditation on March 7, 2024 with CEO Benjamin Mangrich quote. Quality and Compliance Manager Brent Smitley noted that "quality management is at the heart of how we operate" [9]Verified ISO 9001:2015 Certification — Lafayette Instrument
Confirms Lafayette received ISO 9001:2015 accreditation on March 7, 2024 with CEO Benjamin Mangrich quote.
In May 2024, Lafayette also received CE MDR (Medical Device Regulation) approval for its evaluation products, enabling compliant sales of medical devices into the European Union [3]Verified Lafayette Instrument Company News and Awards
Confirms Best Places to Work in Indiana 2024, Aurora Scientific acquisition 2023, 80+ countries served in 2016-2017, CEO Benjamin Mangrich quotes.
Industry Recognition
Lafayette Instrument was named one of Indiana's Best Places to Work by the Indiana Chamber of Commerce in 2024 [3]Verified Lafayette Instrument Company News and Awards
Confirms Best Places to Work in Indiana 2024, Aurora Scientific acquisition 2023, 80+ countries served in 2016-2017, CEO Benjamin Mangrich quotes. The company competed in the small company category (fewer than 74 employees) and was one of the only manufacturing companies on the list [3]Verified Lafayette Instrument Company News and Awards
Confirms Best Places to Work in Indiana 2024, Aurora Scientific acquisition 2023, 80+ countries served in 2016-2017, CEO Benjamin Mangrich quotes. In September 2016, Lafayette was named the Greater Lafayette Commerce Small Business of the Month [1]Verified Lafayette Instrument Company — Our Story
Confirms founding by Max Wastl in 1947, first polygraph in 1972, Campden acquisition 1998, PEAK launch 2016, Limestone acquisition 2022.
The APA's Leonarde Keeler Award — given for long and distinguished service to the polygraph profession — was awarded to "the women and men both past and present of Lafayette Instrument Company" in 2021 [7]Verified APA Awards Recipients
Confirms Cleve Backster Award recipients including Mark Handler (2014), Chip Morgan (2018); Leonarde Keeler Award to Lafayette Instrument Company (2021); and all other APA awards referenced. This is a remarkable honor recognizing the company's collective contribution to the field over decades.
Pros
- Industry leader since 1947 with proven track record and over 75 years of engineering excellence
- Widest product range: LX7 (11 channels), LX6 (10 channels), ParagonX (625 sps) cover every use case
- Only manufacturer offering ECG/PAT cardiovascular measurement (LX7)
- ParagonX offers highest sampling rate (625 sps/channel) in any commercial polygraph system
- Owns PEAK CATC — APA-accredited training school with nearly 300 graduates
- Open-source, peer-reviewed scoring algorithms (OSS-3, ESS-M) bundled with systems
- ISO 9001:2015 certified quality management system since March 2024
- Global dealer network serving 80+ countries
- Attractive LX6 lease program with full ownership after 36 months
- Backward compatibility across the LX6/LX7 sensor ecosystem
Cons
- Premium pricing compared to some competitors
- LXEdge software is sold separately from hardware
- Software is Windows-based (Mac requires virtualization via Parallels)
Frequently Asked Questions
Is Lafayette the most popular polygraph manufacturer?
Yes. Lafayette Instrument Company is widely regarded as the world's leading manufacturer of polygraph instrumentation [2]Verified Lafayette Instrument Company Official Website
Confirms Lafayette as world's leading polygraph manufacturer with 75+ years of experience serving private examiners, government, and military organizations worldwide. Their systems are used by major U.S. federal agencies including the FBI, CIA, NSA, DEA, and Secret Service, as well as thousands of law enforcement departments and private practitioners worldwide. One authorized distributor estimates Lafayette holds approximately 85% of the global polygraph market share [10]Verified Polygraph Services Asia-Pacific — Lafayette Products
Confirms Lafayette holds approximately 85% global market share and instruments preferred by examiners in 80+ countries.
What is the difference between the LX7 and LX6?
The LX7 is Lafayette's newest flagship system with 11 data channels (vs. 10 on the LX6), ECG/PAT cardiovascular measurement capability (unique to the LX7), and a 180 samples/second sampling rate (vs. 120 sps on the LX6) [2]Verified Lafayette Instrument Company Official Website
Confirms Lafayette as world's leading polygraph manufacturer with 75+ years of experience serving private examiners, government, and military organizations worldwide. The LX7 is backward compatible with LX6 sensors. The LX6 remains the proven workhorse deployed across federal agencies, while the LX7 represents the cutting edge for examiners wanting maximum capability [2]Verified Lafayette Instrument Company Official Website
Confirms Lafayette as world's leading polygraph manufacturer with 75+ years of experience serving private examiners, government, and military organizations worldwide.
How does the ParagonX compare to the LX6 and LX7?
The ParagonX, which came to Lafayette through the 2022 acquisition of Limestone Technologies, excels in data acquisition fidelity with 625 samples/second/channel — the highest in any commercial polygraph instrument [15]Verified ParagonX Polygraph System — Lafayette Instrument
Confirms ParagonX 625 samples/second/channel native sampling rate — highest in any polygraph instrument — with 32-bit resolution and Lemo connectors. It features 32-bit resolution and 9 channels with Lemo medical-grade connectors. The LX6 and LX7 offer more channels and wireless Bluetooth connectivity, while the ParagonX prioritizes ultra-high-resolution waveform capture [15]Verified ParagonX Polygraph System — Lafayette Instrument
Confirms ParagonX 625 samples/second/channel native sampling rate — highest in any polygraph instrument — with 32-bit resolution and Lemo connectors. See our ParagonX technical review for full details.
Does Lafayette offer polygraph training?
Yes. Lafayette owns PEAK Credibility Assessment Training Center (PEAK CATC), an APA-accredited and AAPP-recognized polygraph school headquartered in Lakeland, Florida with additional courses offered from Boise, Idaho [20]Verified PEAK Credibility Assessment Training Center — About
Confirms PEAK as APA-accredited and AAPP-recognized, wholly-owned subsidiary of Lafayette, nearly 300 basic course graduates, founded 2016. PEAK offers a 400-hour Basic Polygraph Examiner's Course, 40-hour PCSOT certification, advanced in-person courses, and online continuing education [22]Verified PEAK Basic Training Course Details
Confirms 400-hour minimum basic course, APA accreditation, immersive learning methodology, and west coast expansion to Boise [23]Verified PEAK Online Continuing Education Courses
Confirms APA and AAPP approved online continuing education courses covering diverse polygraph topics. To date, PEAK has trained almost 300 examiners through its basic course [20]Verified PEAK Credibility Assessment Training Center — About
Confirms PEAK as APA-accredited and AAPP-recognized, wholly-owned subsidiary of Lafayette, nearly 300 basic course graduates, founded 2016. Browse the full catalog at PEAK CATC Online Training.
What software works with Lafayette polygraph systems?
LXEdge is the primary modern software platform, compatible with the LX6, LX7, and Paragon series [12]Verified LXEdge Software Platform — Lafayette Instrument
Confirms LXEdge compatibility with LX6, LX7, and Limestone Paragon series, and LX6 lease program details. LXSoftware is the legacy platform supporting the LX4000, LX5000, LX6, and LX7 [18]Verified LXSoftware Platform — Lafayette Instrument
Confirms LXSoftware compatibility with LX4000, LX5000, LX6, LX7, bundled with OSS-3, and Mac support via Parallels. The ParagonX also works with Polygraph Pro Suite software. All platforms include OSS-3 scoring algorithms, and LXEdge also integrates ESS-M [2]Verified Lafayette Instrument Company Official Website
Confirms Lafayette as world's leading polygraph manufacturer with 75+ years of experience serving private examiners, government, and military organizations worldwide. See our LXEdge update coverage for the latest features.
How much does a Lafayette polygraph system cost?
The LX6 launched at a list price of $6,995 in 2017 [13]Verified LX6 Launch Announcement Newsletter
Confirms fall 2017 launch of LX6 with list price of $6,995. The LX7 is the premium flagship system. Lafayette also offers an LX6 lease program with low monthly payments and full ownership after 36 months [14]Verified LX6 Polygraph System Brochure
Confirms LX6 10-channel specifications including Fischer connectors, PPG channel, and feature set. The ParagonX offers a trade-in program with up to $2,700 in credit for older models or competitive systems [16]Verified Best Polygraph Machine Manufacturers Comparison
Confirms ParagonX highest sampling rate, Limestone Technologies acquisition in 2022, and trade-in program details. Pre-owned LX5000 systems are available on the secondary market at reduced prices. For current pricing, contact Lafayette directly at (765) 423-1505 or [email protected].
Where is Lafayette Instrument Company located?
Lafayette Instrument Company is headquartered at 3700 Sagamore Parkway North, Lafayette, Indiana 47904 [2]Verified Lafayette Instrument Company Official Website
Confirms Lafayette as world's leading polygraph manufacturer with 75+ years of experience serving private examiners, government, and military organizations worldwide. The company also maintains international operations through Campden Instruments in the United Kingdom (acquired 1998) and a global network of authorized dealers spanning 80+ countries [1]Verified Lafayette Instrument Company — Our Story
Confirms founding by Max Wastl in 1947, first polygraph in 1972, Campden acquisition 1998, PEAK launch 2016, Limestone acquisition 2022. PEAK CATC training is based at 1925 Bartow Road, Suite 200, Lakeland, FL 33801, with additional west coast courses in Boise, Idaho [20]Verified PEAK Credibility Assessment Training Center — About
Confirms PEAK as APA-accredited and AAPP-recognized, wholly-owned subsidiary of Lafayette, nearly 300 basic course graduates, founded 2016.
Who founded Lafayette Instrument Company?
Lafayette Instrument Company was founded in 1947 by Max Wastl, a German immigrant who studied Electrical Engineering at Purdue University [1]Verified Lafayette Instrument Company — Our Story
Confirms founding by Max Wastl in 1947, first polygraph in 1972, Campden acquisition 1998, PEAK launch 2016, Limestone acquisition 2022. Wastl started the company with a single employee and an 8-by-10-foot workshop shed near Purdue [1]Verified Lafayette Instrument Company — Our Story
Confirms founding by Max Wastl in 1947, first polygraph in 1972, Campden acquisition 1998, PEAK launch 2016, Limestone acquisition 2022. The company produced its first polygraph instrument in 1972 [1]Verified Lafayette Instrument Company — Our Story
Confirms founding by Max Wastl in 1947, first polygraph in 1972, Campden acquisition 1998, PEAK launch 2016, Limestone acquisition 2022 and has since grown into the world's leading polygraph manufacturer. The AAPP's Max Wastl Sr. Award was established in 1990 to honor his long contribution to the polygraph profession [8]Verified Mark Handler Receives Max Wastl Sr. Award from AAPP
Confirms Max Wastl Sr. Award began in 1990 to honor Max Wastl Sr.'s contribution to polygraph, and that Mark Handler received it in 2014 and 2017.
Is Lafayette Instrument ISO certified?
Yes. Lafayette Instrument received ISO 9001:2015 accreditation on March 7, 2024 [9]Verified ISO 9001:2015 Certification — Lafayette Instrument
Confirms Lafayette received ISO 9001:2015 accreditation on March 7, 2024 with CEO Benjamin Mangrich quote. The certification covers the company's quality management system for manufacturing specialized scientific instruments. The company also received CE MDR (Medical Device Regulation) approval for certain evaluation products in May 2024 [3]Verified Lafayette Instrument Company News and Awards
Confirms Best Places to Work in Indiana 2024, Aurora Scientific acquisition 2023, 80+ countries served in 2016-2017, CEO Benjamin Mangrich quotes.
Sources & References
Confirms founding by Max Wastl in 1947, first polygraph in 1972, Campden acquisition 1998, PEAK launch 2016, Limestone acquisition 2022
Confirms Lafayette as world's leading polygraph manufacturer with 75+ years of experience serving private examiners, government, and military organizations worldwide
Confirms Best Places to Work in Indiana 2024, Aurora Scientific acquisition 2023, 80+ countries served in 2016-2017, CEO Benjamin Mangrich quotes
Foundational research on European predecessors to modern polygraph technology, relevant to understanding the scientific heritage behind Lafayette's instrumentation
Confirms Benjamin Mangrich as CEO since September 2022, with MBA from Northwestern Kellogg School of Management
Confirms Mark Handler's extensive publication record and role as Editor of the APA journal Polygraph
Confirms Cleve Backster Award recipients including Mark Handler (2014), Chip Morgan (2018); Leonarde Keeler Award to Lafayette Instrument Company (2021); and all other APA awards referenced
Confirms Max Wastl Sr. Award began in 1990 to honor Max Wastl Sr.'s contribution to polygraph, and that Mark Handler received it in 2014 and 2017
Confirms Lafayette received ISO 9001:2015 accreditation on March 7, 2024 with CEO Benjamin Mangrich quote
Confirms Lafayette holds approximately 85% global market share and instruments preferred by examiners in 80+ countries
Confirms ARGO-A as authorized representative for Lafayette in 16+ countries, and that Lafayette instrumentation is preferred in 90 countries
Confirms LXEdge compatibility with LX6, LX7, and Limestone Paragon series, and LX6 lease program details
Confirms fall 2017 launch of LX6 with list price of $6,995
Confirms LX6 10-channel specifications including Fischer connectors, PPG channel, and feature set
Confirms ParagonX 625 samples/second/channel native sampling rate — highest in any polygraph instrument — with 32-bit resolution and Lemo connectors
Confirms ParagonX highest sampling rate, Limestone Technologies acquisition in 2022, and trade-in program details
Confirms LX5000 specifications including wired/wireless configuration, Bluetooth connectivity, and DAS module design
Confirms LXSoftware compatibility with LX4000, LX5000, LX6, LX7, bundled with OSS-3, and Mac support via Parallels
Foundational research on electrodermal activity measurement — the scientific basis for modern EDA channels used in Lafayette polygraph systems
Confirms PEAK as APA-accredited and AAPP-recognized, wholly-owned subsidiary of Lafayette, nearly 300 basic course graduates, founded 2016
Confirms the Backster School of Lie Detection was added to PEAK CATC, continuing 60+ years of polygraph education legacy
Confirms 400-hour minimum basic course, APA accreditation, immersive learning methodology, and west coast expansion to Boise
Confirms APA and AAPP approved online continuing education courses covering diverse polygraph topics
Confirms Chip Morgan as 2024-2025 APA President and 2025-2026 Chairman; AAPP certification #1646; Max Wastl and Cleve Backster awards; instructor details for Dunn, Orr, and Walters
Foundational research documenting how instrumental lie detection moved from first operational use in 1917 to routine deployment in 15 federal agencies post-WWII
Independently confirms Lafayette Instrument Company was founded in 1947 by Max Wastl in Lafayette, Indiana
Confirms current APA leadership including Chip Morgan as President, Mark Handler as Editor & Web Administrator
Confirms Chip Morgan's 35 years law enforcement experience, AAPP certification #1646, 2024-2025 APA President, Max Wastl and Cleve Backster awards
Independently confirms Lafayette as global leader in polygraph instruments selling to most federal law enforcement and government security agencies
Whatever instrument your examiner uses, you can find a lie detector test near you and compare current pricing at professional testing locations near you.