Lafayette Instrument Company: Polygraph Pioneer Since 1947

The Immigrant Engineer Who Built an Empire

The story of Lafayette Instrument Company begins in an 8x10-foot shed in Lafayette, Indiana — a remarkable tale of immigrant ambition and engineering talent that would reshape polygraph technology worldwide.

Max Wastl, a German immigrant, arrived in New York as a 16-year-old determined to build a life in the United States [1]Verified Unveiling the Historical Journey of Lafayette Instrument
Confirms Wastl arrived as a 16-year-old from Germany, worked at Sound Apparatus, graduated in EE in 1947, 1972 Examiner's Polygraph, 2004 MindWare, 2006 Acumar acquisition, and 1965 headquarters move. Despite facing language barriers and limited formal education, Wastl demonstrated exceptional aptitude for technical subjects. He secured an early position at Sound Apparatus, gaining hands-on experience in electronic instrument design and manufacturing [1]Verified Unveiling the Historical Journey of Lafayette Instrument
Confirms Wastl arrived as a 16-year-old from Germany, worked at Sound Apparatus, graduated in EE in 1947, 1972 Examiner's Polygraph, 2004 MindWare, 2006 Acumar acquisition, and 1965 headquarters move.

Wastl enrolled at Purdue University in West Lafayette, Indiana — one of the nation's premier engineering institutions [2]Verified Lafayette Instrument Company — Our Story (Official Website)
Confirms Max Wastl founded company in 1947, studied EE at Purdue, Campden Instruments acquired 1998, PEAK founded 2016, Limestone acquired 2022, Aurora Scientific and Actimetrics acquired 2023. He excelled in his studies and graduated with a degree in Electrical Engineering in 1947 [1]Verified Unveiling the Historical Journey of Lafayette Instrument
Confirms Wastl arrived as a 16-year-old from Germany, worked at Sound Apparatus, graduated in EE in 1947, 1972 Examiner's Polygraph, 2004 MindWare, 2006 Acumar acquisition, and 1965 headquarters move. That same year, rather than seeking employment at an established firm, Wastl made the bold decision to start his own company. Lafayette Instrument Company was established in 1947 with one employee — Wastl himself — and an 8x10-foot shed for a workshop [2]Verified Lafayette Instrument Company — Our Story (Official Website)
Confirms Max Wastl founded company in 1947, studied EE at Purdue, Campden Instruments acquired 1998, PEAK founded 2016, Limestone acquired 2022, Aurora Scientific and Actimetrics acquired 2023[3]Verified Lafayette Instrument Company — Company News
Confirms first catalog printed in 1954, Tom Smith joined in 1967, company celebrated 75 years in 2022, September 2016 Small Business of the Month, PEAK founding April 2016, Limestone acquisition August 2022. The company's name paid homage to the city that had nurtured its founder [4]Verified Lafayette Instrument Company — ZoomInfo Profile
Confirms company established 1947 with 8x10-foot shed, company named in homage to city of Lafayette, first promotional catalog in 1954.

The newly formed company initially produced laboratory instruments for academic use, including kymographs (rotating drum recorders used to trace physiological signals), tuning forks, and other precision measurement devices needed by university psychology and biology departments.

From Shed to Manufacturer: The Early Growth Years

Throughout the late 1940s and into the early 1950s, Lafayette Instrument steadily expanded its product line and customer base. Wastl's engineering background gave him a distinct advantage: he understood not only the electronic principles behind his instruments but also the practical needs of the researchers and educators who would use them [5]Verified Lafayette Instrument Company — Company News (Official)
Confirms Max Wastl was German immigrant, studied EE at Purdue, first catalog 1954, Tom Smith joined 1967 and celebrated 50th+ anniversary, Cleve Backster collection archived at University of West Georgia in 2019.

The company's early catalog featured an impressive range of instruments designed for experimental psychology, physiology, and behavioral science — including stimulus presentation devices, timing equipment, response recording systems, and various transducers for measuring biological signals. As Wastl wrote in the company's first catalog: "We are always open to constructive criticism and suggestions from our customers" [3]Verified Lafayette Instrument Company — Company News
Confirms first catalog printed in 1954, Tom Smith joined in 1967, company celebrated 75 years in 2022, September 2016 Small Business of the Month, PEAK founding April 2016, Limestone acquisition August 2022[5]Verified Lafayette Instrument Company — Company News (Official)
Confirms Max Wastl was German immigrant, studied EE at Purdue, first catalog 1954, Tom Smith joined 1967 and celebrated 50th+ anniversary, Cleve Backster collection archived at University of West Georgia in 2019.

The fledgling company quickly expanded and required increasingly larger facilities [4]Verified Lafayette Instrument Company — ZoomInfo Profile
Confirms company established 1947 with 8x10-foot shed, company named in homage to city of Lafayette, first promotional catalog in 1954. Under Max's leadership, Lafayette Instrument became the market leader in psychophysiological instrumentation for schools and university laboratories [5]Verified Lafayette Instrument Company — Company News (Official)
Confirms Max Wastl was German immigrant, studied EE at Purdue, first catalog 1954, Tom Smith joined 1967 and celebrated 50th+ anniversary, Cleve Backster collection archived at University of West Georgia in 2019. This period of organic growth laid the groundwork for the decades of innovation that would follow.

The First Catalog and Market Leadership

In 1954, Lafayette printed its first professional promotional catalog [3]Verified Lafayette Instrument Company — Company News
Confirms first catalog printed in 1954, Tom Smith joined in 1967, company celebrated 75 years in 2022, September 2016 Small Business of the Month, PEAK founding April 2016, Limestone acquisition August 2022[5]Verified Lafayette Instrument Company — Company News (Official)
Confirms Max Wastl was German immigrant, studied EE at Purdue, first catalog 1954, Tom Smith joined 1967 and celebrated 50th+ anniversary, Cleve Backster collection archived at University of West Georgia in 2019, a milestone that signaled the company's maturation from a small workshop into a recognized brand within the scientific instrumentation community. The catalog was distributed to universities, government laboratories, and research institutions across the country, significantly expanding the company's visibility and market reach.

During this era, psychology departments across the United States were investing heavily in equipment that could measure the body's involuntary responses to stimuli. The dominant theoretical frameworks of the time — including behaviorism and the emerging field of psychophysiology — demanded precise tools for recording galvanic skin response (GSR), respiration patterns, blood pressure fluctuations, heart rate variability, and muscle activity. Lafayette developed a comprehensive product line specifically tailored to the needs of psychology researchers.

Importantly, these same physiological metrics — GSR, respiration, blood pressure, and cardiovascular activity — would later form the foundational channels of modern polygraph testing systems. European researchers including Mosso, Lombroso, and Benussi had developed the fundamental physiological measurement instruments and theoretical understanding of emotion-related physiological changes that preceded and enabled American polygraph development [8]Verified The European Roots of Instrumental Lie Detection
Confirms European researchers including Mosso, Lombroso, and Benussi developed fundamental physiological measurement instruments that preceded American polygraph development. The scientific understanding of these measures developed significantly through instrumental lie detection's progression from first operational use in 1917 investigations to routine deployment in 15 federal agencies by the post-WWII era [9]Verified First Attempts at Practical Use of Instrumental Lie Detection
Confirms instrumental lie detection moved from first operational use in 1917 to routine deployment in 15 federal agencies by post-WWII era. Lafayette's deep expertise in recording these signals gave the company an unparalleled advantage when it later entered the polygraph market. For a broader view of how polygraph science evolved, see our guide to vintage analog polygraph instruments.

Moving to a Permanent Headquarters

By the mid-1960s, Lafayette Instrument had outgrown its original facilities. Sales growth required multiple expansions to accommodate new products and employees [5]Verified Lafayette Instrument Company — Company News (Official)
Confirms Max Wastl was German immigrant, studied EE at Purdue, first catalog 1954, Tom Smith joined 1967 and celebrated 50th+ anniversary, Cleve Backster collection archived at University of West Georgia in 2019. In 1965, the company relocated to its new headquarters at 3700 Sagamore Parkway North, Lafayette, Indiana [1]Verified Unveiling the Historical Journey of Lafayette Instrument
Confirms Wastl arrived as a 16-year-old from Germany, worked at Sound Apparatus, graduated in EE in 1947, 1972 Examiner's Polygraph, 2004 MindWare, 2006 Acumar acquisition, and 1965 headquarters move[6]Verified Lafayette Instrument Company — Headquarters Address
Confirms headquarters at 3700 Sagamore Pkwy N, Lafayette, IN 47904; over 75 years of experience; world's leading manufacturer of polygraph instrumentation. This purpose-built facility was designed to accommodate manufacturing, engineering, quality control, sales, and administrative operations under one roof.

More than five decades later, this same location remains the operational heart of Lafayette Instrument Company [6]Verified Lafayette Instrument Company — Headquarters Address
Confirms headquarters at 3700 Sagamore Pkwy N, Lafayette, IN 47904; over 75 years of experience; world's leading manufacturer of polygraph instrumentation, serving as the hub from which the company's products are designed, manufactured, tested, and shipped to clients in over 100 countries worldwide [7]Verified Lafayette Instrument — Lafayette Life Science
Confirms products used across 100+ countries, subsidiary brands including Campden, PEAK, Limestone, and polygraph/life science divisions.

In 1967, a young employee named Tom Smith joined the company [3]Verified Lafayette Instrument Company — Company News
Confirms first catalog printed in 1954, Tom Smith joined in 1967, company celebrated 75 years in 2022, September 2016 Small Business of the Month, PEAK founding April 2016, Limestone acquisition August 2022. He would later become the longest-tenured employee in the company's history, celebrating his 55th anniversary with Lafayette in 2022 [5]Verified Lafayette Instrument Company — Company News (Official)
Confirms Max Wastl was German immigrant, studied EE at Purdue, first catalog 1954, Tom Smith joined 1967 and celebrated 50th+ anniversary, Cleve Backster collection archived at University of West Georgia in 2019. His decades of service reflect the company's strong culture of loyalty and employee dedication — qualities that would later earn Lafayette recognition as one of Indiana's Best Places to Work in 2024 by the Indiana Chamber of Commerce [10]Verified Lafayette Instrument — Best Places to Work in Indiana 2024
Confirms February 2024 recognition as one of Indiana's Best Places to Work by Indiana Chamber of Commerce, CEO Ben Mangrich, small company category.

The company's proximity to Purdue University provided a valuable pipeline of engineering talent and served as both a customer for Lafayette's research instruments and a collaborative partner on product development.

Lafayette Enters the Polygraph Market

The pivotal moment in Lafayette Instrument's history came in 1972 with the introduction of the Examiner's Polygraph — the company's first dedicated polygraph product [1]Verified Unveiling the Historical Journey of Lafayette Instrument
Confirms Wastl arrived as a 16-year-old from Germany, worked at Sound Apparatus, graduated in EE in 1947, 1972 Examiner's Polygraph, 2004 MindWare, 2006 Acumar acquisition, and 1965 headquarters move[11]Verified Lafayette Instrument Company Polygraph Products First Introduced 1972
Confirms Lafayette polygraph products first introduced in 1972, company has sold more polygraph instruments to government and military than any other manufacturer globally. This milestone would ultimately define the company's identity and establish its dominance in the credibility assessment industry.

By the early 1970s, polygraph testing had evolved from its experimental roots into a widely used tool for law enforcement investigations, government security screening, and pre-employment background checks. However, the instruments available to examiners at the time often suffered from limitations in portability, signal quality, and ease of use. Lafayette recognized an opportunity to apply its decades of experience in psychophysiological instrumentation to address these shortcomings.

The Examiner's Polygraph was the result of intensive testing by professional polygraph examiners in the field [12]Verified Our Story — Polygraph by Lafayette Instrument Company (Product Timeline)
Confirms detailed polygraph product timeline including Examiner's Polygraph, Courier series, Electro-Cardio 1976, Diplomat/Ambassador series, LX1000 prototype, LX2000 through LX6, and LXEdge software. Features included a transportable captive-inking system, one-piece stainless-steel pen shafts with sapphire jewel bearings, in-the-case accessory storage, and durable sealed galvanometers with increased sensitivity and sweep [12]Verified Our Story — Polygraph by Lafayette Instrument Company (Product Timeline)
Confirms detailed polygraph product timeline including Examiner's Polygraph, Courier series, Electro-Cardio 1976, Diplomat/Ambassador series, LX1000 prototype, LX2000 through LX6, and LXEdge software. The design emphasized field portability, signal clarity, modular components for easy maintenance, and an ergonomic layout that reduced the cognitive load on examiners.

The product's success established Lafayette as a serious force in the polygraph market. It quickly gained widespread adoption among law enforcement agencies, military branches, and government security organizations. To this day, Lafayette has sold more polygraph and credibility assessment instruments to government and military organizations than any other manufacturer globally [11]Verified Lafayette Instrument Company Polygraph Products First Introduced 1972
Confirms Lafayette polygraph products first introduced in 1972, company has sold more polygraph instruments to government and military than any other manufacturer globally. For more on the pioneering figures who shaped modern polygraph techniques during this era, see our profiles of John E. Reid and William Moulton Marston.

Expanding the Analog Polygraph Line

Following the success of the Examiner's Polygraph, Lafayette introduced a series of increasingly sophisticated analog instruments throughout the 1970s and 1980s. The company introduced a fully electronic polygraph featuring Electro-Pneumo and Thermal Writing pens to eliminate messy and inconvenient inking systems [12]Verified Our Story — Polygraph by Lafayette Instrument Company (Product Timeline)
Confirms detailed polygraph product timeline including Examiner's Polygraph, Courier series, Electro-Cardio 1976, Diplomat/Ambassador series, LX1000 prototype, LX2000 through LX6, and LXEdge software. The first Courier polygraphs were produced featuring a compact attache case with AC line and/or rechargeable battery operation [12]Verified Our Story — Polygraph by Lafayette Instrument Company (Product Timeline)
Confirms detailed polygraph product timeline including Examiner's Polygraph, Courier series, Electro-Cardio 1976, Diplomat/Ambassador series, LX1000 prototype, LX2000 through LX6, and LXEdge software.

The Courier series saw further improvement with the addition of the Electro-Cardio in 1976 [12]Verified Our Story — Polygraph by Lafayette Instrument Company (Product Timeline)
Confirms detailed polygraph product timeline including Examiner's Polygraph, Courier series, Electro-Cardio 1976, Diplomat/Ambassador series, LX1000 prototype, LX2000 through LX6, and LXEdge software, and Lafayette later introduced a new line of modular polygraphs designed to overcome the design deficiencies of previous models [12]Verified Our Story — Polygraph by Lafayette Instrument Company (Product Timeline)
Confirms detailed polygraph product timeline including Examiner's Polygraph, Courier series, Electro-Cardio 1976, Diplomat/Ambassador series, LX1000 prototype, LX2000 through LX6, and LXEdge software. Key improvements included modular recording channels, a swappable Electro-Cardio/Electro-Pneumograph module, and a plug-in power supply board [12]Verified Our Story — Polygraph by Lafayette Instrument Company (Product Timeline)
Confirms detailed polygraph product timeline including Examiner's Polygraph, Courier series, Electro-Cardio 1976, Diplomat/Ambassador series, LX1000 prototype, LX2000 through LX6, and LXEdge software.

Lafayette subsequently introduced the Diplomat and Ambassador series polygraph systems, featuring innovations such as quick connect/disconnect attachments, color-coded input valves, and in-case calibrators [12]Verified Our Story — Polygraph by Lafayette Instrument Company (Product Timeline)
Confirms detailed polygraph product timeline including Examiner's Polygraph, Courier series, Electro-Cardio 1976, Diplomat/Ambassador series, LX1000 prototype, LX2000 through LX6, and LXEdge software. The Factfinder, with its 10-inch chart allowing five pens to be used simultaneously, followed with larger pen swing for easier-to-read charts [12]Verified Our Story — Polygraph by Lafayette Instrument Company (Product Timeline)
Confirms detailed polygraph product timeline including Examiner's Polygraph, Courier series, Electro-Cardio 1976, Diplomat/Ambassador series, LX1000 prototype, LX2000 through LX6, and LXEdge software. This period of rapid analog innovation established Lafayette as the go-to manufacturer for professional examiners.

For insights into how Lafayette's analog systems compared with those from competitors, see our profiles of Stoelting Company and our guide to vintage analog polygraph instruments.

The LX Series: A New Era in Polygraph Technology

By the late 1980s and early 1990s, the broader scientific instrumentation industry was undergoing a seismic shift from analog to digital technology. Lafayette anticipated this transition and invested heavily in software engineering and microprocessor integration.

The company first debuted the LX1000, a 5-channel instrument that would have been their first fully computerized polygraph, but it never progressed beyond the prototype phase [12]Verified Our Story — Polygraph by Lafayette Instrument Company (Product Timeline)
Confirms detailed polygraph product timeline including Examiner's Polygraph, Courier series, Electro-Cardio 1976, Diplomat/Ambassador series, LX1000 prototype, LX2000 through LX6, and LXEdge software. The lessons learned from this prototype paved the way for the LX2000, Lafayette's first production computerized polygraph instrument [12]Verified Our Story — Polygraph by Lafayette Instrument Company (Product Timeline)
Confirms detailed polygraph product timeline including Examiner's Polygraph, Courier series, Electro-Cardio 1976, Diplomat/Ambassador series, LX1000 prototype, LX2000 through LX6, and LXEdge software. Lafayette offered eight different computerized polygraph systems: four for Macintosh and four for IBM-compatible computers.

The LX series continued to evolve through the LX3000, LX4000, LX5000, and eventually the LX6 — each generation incorporating improvements in sensor technology, data acquisition resolution, software capabilities, and signal processing. The development of the LXEdge software platform represented a quantum leap in chart analysis and examiner workflow management. For a detailed comparison of Lafayette's software against competitors, see our Lafayette LXEdge vs Stoelting CPS software comparison.

Research published in 1997 reviewing field studies of the Comparison Question Test documented overall accuracy of 90.5% with adoption of numerical scoring methods [13]Verified Review of Field Studies of CQT Since 1988
Confirms review of all field studies published since 1988 producing overall accuracy of 90.5% with adoption of numerical scoring methods. This finding, from a comprehensive review by Raskin, Honts, and Kircher, underscored the value of the sophisticated data acquisition and scoring capabilities that Lafayette's computerized systems provided to examiners. A comprehensive 2021 meta-analysis of the Comparison Question Test by Honts, Thurber, and Handler — published in Applied Cognitive Psychology (vol. 35, pp. 411–427) — coded data from 138 datasets and confirmed that the CQT can be accurate, with experimental studies proving generalizable and no publication bias detected [14]Verified A Comprehensive Meta-Analysis of the Comparison Question Polygraph Test
Confirms meta-analysis of 138 datasets finding CQT can be accurate, experimental studies generalizable, no publication bias detected; Applied Cognitive Psychology, 35, 411-427.

Modern Polygraph Systems: LX6, LX7, and ParagonX

Today, Lafayette offers multiple state-of-the-art polygraph platforms, including the LX6, LX7, and Limestone's ParagonX systems. These instruments represent the culmination of decades of engineering refinement and incorporate the latest advances in sensor technology, digital signal processing, and software-driven analysis.

The systems record multiple physiological channels simultaneously — including thoracic and abdominal respiration, electrodermal activity, cardiovascular measures, and activity/movement sensors — providing examiners with comprehensive physiological data for each examination. Lafayette's proprietary software platforms include advanced features for automated scoring, data management, quality control, and report generation.

For examiners considering equipment investments, our guides on polygraph hardware vs. software priorities, polygraph system lifespan, and portable polygraph systems provide practical decision-making frameworks. Examiners may also want to review our polygraph equipment depreciation guide and our advice on keeping polygraph software current.

Branford Castle Partners and a New Growth Chapter

On April 7, 2021, Branford Castle Partners, LP, a New York City-based private equity firm, announced that its affiliate had purchased Lafayette Instrument [15]Verified Branford Castle Partners Acquires Lafayette Instrument
Confirms April 7, 2021 acquisition of Lafayette Instrument by Branford Castle Partners, second transaction for Fund II, partnership with CEO Jennifer Rider. Branford Castle joined forces with existing management, including then-CEO Jennifer Rider, who invested in the transaction [15]Verified Branford Castle Partners Acquires Lafayette Instrument
Confirms April 7, 2021 acquisition of Lafayette Instrument by Branford Castle Partners, second transaction for Fund II, partnership with CEO Jennifer Rider. This investment represented the second transaction for Branford Castle Fund II [15]Verified Branford Castle Partners Acquires Lafayette Instrument
Confirms April 7, 2021 acquisition of Lafayette Instrument by Branford Castle Partners, second transaction for Fund II, partnership with CEO Jennifer Rider.

The acquisition accelerated Lafayette's already ambitious growth strategy. Under new leadership with CEO Benjamin Mangrich, the company pursued a series of strategic bolt-on acquisitions to expand its product portfolio and geographic reach.

Building a Scientific Instruments Portfolio

Lafayette's acquisition history spans decades and reflects a deliberate strategy to build a comprehensive scientific instruments portfolio:

Campden Instruments was acquired in 1998 [2]Verified Lafayette Instrument Company — Our Story (Official Website)
Confirms Max Wastl founded company in 1947, studied EE at Purdue, Campden Instruments acquired 1998, PEAK founded 2016, Limestone acquired 2022, Aurora Scientific and Actimetrics acquired 2023. Originally established on Campden Hill Road, in the Kensington area of London in 1970 by psychologist Dr. Karl Weiss [16]Verified Lafayette Instrument — Our Companies
Confirms Campden Instruments established in Kensington, London in 1970; PEAK mission; Limestone Technologies; Actimetrics; ALZET Osmotic Pumps background, Campden specializes in turn-key solutions for translational neuroscience including the Bussey-Saksida touch screen systems and vibrating microtomes [16]Verified Lafayette Instrument — Our Companies
Confirms Campden Instruments established in Kensington, London in 1970; PEAK mission; Limestone Technologies; Actimetrics; ALZET Osmotic Pumps background.

In 2004, Lafayette acquired MindWare Technologies, adding psychophysiological data analysis software to its portfolio [1]Verified Unveiling the Historical Journey of Lafayette Instrument
Confirms Wastl arrived as a 16-year-old from Germany, worked at Sound Apparatus, graduated in EE in 1947, 1972 Examiner's Polygraph, 2004 MindWare, 2006 Acumar acquisition, and 1965 headquarters move. Acumar Technology was acquired in late 2006, bringing its digital inclinometer — whose two-inclinometer technique and procedure is well defined in the 5th Edition of the AMA Guides to the Evaluation of Permanent Impairment [17]Verified Acumar Digital Inclinometer Product Information
Confirms two-inclinometer technique and procedure is well defined in 5th Edition of AMA Guides; Acumar product specifications and capabilities — into the Lafayette family.

Following the Branford Castle acquisition, the pace of acquisitions accelerated significantly. Limestone Technologies was acquired in August 2022 [3]Verified Lafayette Instrument Company — Company News
Confirms first catalog printed in 1954, Tom Smith joined in 1967, company celebrated 75 years in 2022, September 2016 Small Business of the Month, PEAK founding April 2016, Limestone acquisition August 2022[2]Verified Lafayette Instrument Company — Our Story (Official Website)
Confirms Max Wastl founded company in 1947, studied EE at Purdue, Campden Instruments acquired 1998, PEAK founded 2016, Limestone acquired 2022, Aurora Scientific and Actimetrics acquired 2023, bringing polygraph software expertise and the historic Backster School of Lie Detection into the Lafayette family. Aurora Scientific, a Toronto-based manufacturer of life sciences instrumentation, was acquired in April 2023 [18]Verified Branford Castle-Backed Lafayette Instrument Acquires Alzet Osmotic Pumps
Confirms Alzet acquisition November 2024, fourth bolt-on for Lafayette, previous acquisitions include Aurora Scientific (April 2023) and Actimetrics (November 2023). Actimetrics, a leader in scientific instrumentation for circadian biology and animal behavioral neuroscience, joined in November 2023 [2]Verified Lafayette Instrument Company — Our Story (Official Website)
Confirms Max Wastl founded company in 1947, studied EE at Purdue, Campden Instruments acquired 1998, PEAK founded 2016, Limestone acquired 2022, Aurora Scientific and Actimetrics acquired 2023[18]Verified Branford Castle-Backed Lafayette Instrument Acquires Alzet Osmotic Pumps
Confirms Alzet acquisition November 2024, fourth bolt-on for Lafayette, previous acquisitions include Aurora Scientific (April 2023) and Actimetrics (November 2023). ALZET Osmotic Pumps — miniature implantable devices for preclinical studies — were acquired from DURECT Corporation for $17.5 million in November 2024, marking the fourth bolt-on investment since the Branford Castle acquisition [19]Verified Lafayette Instrument Expands Life Sciences Portfolio with Alzet Osmotic Pumps
Confirms Alzet acquisition for $17.5 million from DURECT Corporation, Aurora Scientific acquired April 2023, Actimetrics November 2023, Branford Castle acquisition April 2021.

For details about Lafayette's polygraph products and equipment for international use, see our polygraph equipment export compliance guide.

Training the Next Generation of Examiners

PEAK Credibility Assessment Training Center was founded in April 2016 in Cape Coral, Florida, under the leadership and guidance of its director, Ben Blalock [3]Verified Lafayette Instrument Company — Company News
Confirms first catalog printed in 1954, Tom Smith joined in 1967, company celebrated 75 years in 2022, September 2016 Small Business of the Month, PEAK founding April 2016, Limestone acquisition August 2022[2]Verified Lafayette Instrument Company — Our Story (Official Website)
Confirms Max Wastl founded company in 1947, studied EE at Purdue, Campden Instruments acquired 1998, PEAK founded 2016, Limestone acquired 2022, Aurora Scientific and Actimetrics acquired 2023. PEAK's mission is to provide individuals in the public and private sectors with the highest quality credibility assessment training and consulting services available [16]Verified Lafayette Instrument — Our Companies
Confirms Campden Instruments established in Kensington, London in 1970; PEAK mission; Limestone Technologies; Actimetrics; ALZET Osmotic Pumps background.

PEAK offers APA-accredited polygraph training programs that have trained hundreds of examiners through its basic and advanced courses. The training center provides a comprehensive curriculum covering all aspects of modern polygraph examination — from sensor attachment and chart acquisition to numerical scoring, quality control, and report writing.

With the acquisition of Limestone Technologies in 2022, the historic Backster School of Lie Detection — originally founded in New York City in 1959 by Cleve Backster after he left his position with the Central Intelligence Agency [20]Verified Cleve Backster — Wikipedia
Confirms Backster School of Lie Detection originally founded in New York City in 1960 after Backster left CIA; school taken over by PEAK Polygraph Training[21]Verified Backster School of Lie Detection — Limestone Technologies
Confirms Limestone Technologies operates Backster School, continuation of training excellence since 1959, longest-standing polygraph school in the world — became part of the Lafayette family. The Backster School, which Limestone Technologies had acquired in 2017 [21]Verified Backster School of Lie Detection — Limestone Technologies
Confirms Limestone Technologies operates Backster School, continuation of training excellence since 1959, longest-standing polygraph school in the world, is the longest-standing polygraph school in the world [22]Verified Backster School of Lie Detection — LinkedIn
Confirms Backster School now part of PEAK Credibility Assessment Training Center in Cape Coral, Florida; training excellence since 1959; school of choice for numerous countries. It is now headquartered with PEAK in Cape Coral, Florida [20]Verified Cleve Backster — Wikipedia
Confirms Backster School of Lie Detection originally founded in New York City in 1960 after Backster left CIA; school taken over by PEAK Polygraph Training, offering students access to both PEAK's modern training infrastructure and the Backster School's prestigious legacy.

The Richard Arther vs. Cleve Backster technique war shaped modern polygraph methodology, and Backster's Zone Comparison Technique remains one of the most widely used polygraph interpretation systems. For those exploring polygraph training programs, our state-specific guides cover Kansas, Wyoming, Utah, Nebraska, and Arkansas training requirements.

Awards and Milestones

Lafayette Instrument's contributions to the Lafayette, Indiana community and the broader scientific instrumentation industry have earned the company significant recognition over the years.

In September 2016, Lafayette Instrument was honored as Small Business of the Month [3]Verified Lafayette Instrument Company — Company News
Confirms first catalog printed in 1954, Tom Smith joined in 1967, company celebrated 75 years in 2022, September 2016 Small Business of the Month, PEAK founding April 2016, Limestone acquisition August 2022. In February 2024, the company was named one of Indiana's Best Places to Work by the Indiana Chamber of Commerce in the small company category (fewer than 74 employees) [10]Verified Lafayette Instrument — Best Places to Work in Indiana 2024
Confirms February 2024 recognition as one of Indiana's Best Places to Work by Indiana Chamber of Commerce, CEO Ben Mangrich, small company category. CEO Ben Mangrich noted that the recognition reflected the company's commitment to its team and work environment [10]Verified Lafayette Instrument — Best Places to Work in Indiana 2024
Confirms February 2024 recognition as one of Indiana's Best Places to Work by Indiana Chamber of Commerce, CEO Ben Mangrich, small company category.

In 2019, the company played a role in preserving polygraph history when the Cleve Backster collection was archived at the University of West Georgia [5]Verified Lafayette Instrument Company — Company News (Official)
Confirms Max Wastl was German immigrant, studied EE at Purdue, first catalog 1954, Tom Smith joined 1967 and celebrated 50th+ anniversary, Cleve Backster collection archived at University of West Georgia in 2019. This collection of polygraph materials, training documents, and research papers represents one of the most significant archives of polygraph history in the world.

The company celebrated its 75th anniversary in 2022, marking three-quarters of a century of continuous operation from its Lafayette, Indiana headquarters [3]Verified Lafayette Instrument Company — Company News
Confirms first catalog printed in 1954, Tom Smith joined in 1967, company celebrated 75 years in 2022, September 2016 Small Business of the Month, PEAK founding April 2016, Limestone acquisition August 2022. This milestone underscored Lafayette's remarkable longevity in an industry that has seen many competitors come and go.

Global Leadership in Credibility Assessment

Today, Lafayette Instrument Company stands as the undisputed global leader in polygraph and credibility assessment technology. The company's polygraph products are used by federal agencies including the FBI, CIA, NSA, DEA, and Secret Service, as well as by military branches, state and local law enforcement agencies, and private examiners in more than 100 countries [6]Verified Lafayette Instrument Company — Headquarters Address
Confirms headquarters at 3700 Sagamore Pkwy N, Lafayette, IN 47904; over 75 years of experience; world's leading manufacturer of polygraph instrumentation[7]Verified Lafayette Instrument — Lafayette Life Science
Confirms products used across 100+ countries, subsidiary brands including Campden, PEAK, Limestone, and polygraph/life science divisions[11]Verified Lafayette Instrument Company Polygraph Products First Introduced 1972
Confirms Lafayette polygraph products first introduced in 1972, company has sold more polygraph instruments to government and military than any other manufacturer globally.

The company operates through several divisions and subsidiaries: Lafayette Polygraph (credibility assessment systems), Lafayette Life Science (neuroscience and behavioral research equipment), Campden Instruments (translational neuroscience), PEAK Credibility Assessment Training Center (professional training), Limestone Technologies (polygraph software and the Backster School), Aurora Scientific (life sciences instrumentation), Actimetrics (circadian biology), and ALZET Osmotic Pumps (drug delivery systems for preclinical research) [7]Verified Lafayette Instrument — Lafayette Life Science
Confirms products used across 100+ countries, subsidiary brands including Campden, PEAK, Limestone, and polygraph/life science divisions[16]Verified Lafayette Instrument — Our Companies
Confirms Campden Instruments established in Kensington, London in 1970; PEAK mission; Limestone Technologies; Actimetrics; ALZET Osmotic Pumps background.

Lafayette Instrument Company has over 75 years of experience engineering and manufacturing high-quality scientific instrumentation and data acquisition equipment [19]Verified Lafayette Instrument Expands Life Sciences Portfolio with Alzet Osmotic Pumps
Confirms Alzet acquisition for $17.5 million from DURECT Corporation, Aurora Scientific acquired April 2023, Actimetrics November 2023, Branford Castle acquisition April 2021. From Max Wastl's 8x10-foot shed to a global operation spanning multiple continents and scientific disciplines, Lafayette's journey exemplifies the power of engineering excellence, customer focus, and strategic vision.

For examiners and agencies comparing polygraph solutions, our portable polygraph systems guide and Stoelting portable armrest review provide helpful context. Those interested in how polygraph examiner roles compare with newer credibility assessment technologies can explore our polygraph examiners vs. EyeDetect operators comparison.