Polygraph Manufacturer Customer Support: Ranked 2026

The Hidden Cost of Poor Post-Sale Support

When a polygraph examiner invests in a computerized polygraph system — with professional equipment costs ranging from approximately $2,000 for basic models up to $20,000 for high-end configurations [6]Verified Polygraph Equipment Pricing — DotMed.com
Confirms basic polygraph machines range from $1,500 to $3,000 and high-end models up to $20,000 — the purchase price is only part of the story. The quality of customer support that comes with that equipment can make the difference between a productive practice and one plagued by downtime, missed appointments, and revenue loss.

Unlike consumer electronics where you might tolerate a few days of waiting for a response, polygraph equipment is a professional tool that directly generates income. Standard polygraph test fees range from $400 to $1,200 per examination [7]Verified Polygraph Test Cost Guide — Axeligence
Confirms standard polygraph tests cost $400-$1,200 in 2025, meaning every hour of downtime represents meaningful lost revenue. For law enforcement agencies and government purchasers, support quality carries additional weight. Many agencies operate polygraph units that conduct dozens of examinations per week. A software crash or hardware failure that takes a week to resolve can cascade into a serious backlog of pre-employment screenings or criminal investigations.

The polygraph industry is small compared to mainstream tech markets, and this has both advantages and disadvantages for customer support. On the positive side, support teams tend to know their products deeply and can often resolve issues that would require multiple escalation tiers in a larger company. On the negative side, smaller companies may have limited support staff. Understanding these dynamics is essential for making an informed purchasing decision. For a detailed look at what modern polygraph testing involves, see our complete guide to lie detector tests.

What the Examiner Community Reports

The polygraph examiner community, while professional and relatively small, is active in sharing experiences about equipment reliability and manufacturer responsiveness. Feedback gathered from APA and AAPP conferences, online forums, training school networks, and direct examiner conversations reveals consistent patterns about each manufacturer's support culture. Some manufacturers have built loyal followings specifically because of their support reputation, while others have lost customers despite having technically competitive products.

It is important to note that individual experiences can vary widely. An examiner who has a straightforward software question during a slow period may receive excellent support, while the same manufacturer might appear less responsive during a major product launch or conference season. If you are an examiner considering new equipment, we recommend reaching out to colleagues who use the system you are evaluating and asking specifically about their support experiences. Our full manufacturer comparison guide provides additional warranty and support details.

Evaluation Criteria and Methodology

Our editorial ranking evaluates polygraph manufacturer customer support across eight key dimensions, each weighted based on its practical impact on working examiners:

Initial Response Time (20%): How quickly does the manufacturer acknowledge a support request? We assessed phone, email, and web form responsiveness. Resolution Time (20%): How long from initial contact to full issue resolution, evaluated separately for software, hardware, and training questions. Support Channel Availability (10%): What channels are available — phone, email, chat, remote desktop, or on-site support? Technical Knowledge (15%): Does the first-line support representative have genuine polygraph expertise, or is there excessive escalation? Training Resources (10%): Quality and breadth of manuals, video tutorials, webinars, and in-person training opportunities. Software Update Policy (10%): Frequency of updates, whether they are included in the purchase price, and ease of installation. Warranty and Repair (10%): Warranty duration, repair turnaround time, and availability of loaner units. Community Reputation (5%): Overall satisfaction reported by the examiner community.

This evaluation reflects our editorial assessment based on published manufacturer support policies, warranty documentation, conversations with examiners at industry events, and direct inquiries placed to each manufacturer's support channels. We did not receive compensation from any manufacturer, and all were given the opportunity to verify factual claims about their support offerings. Understanding the history of how software changed lie detector testing provides useful context for evaluating current support infrastructure.

Overview and Support Infrastructure

Lafayette Instrument Company, headquartered at 3700 Sagamore Parkway North in Lafayette, Indiana, is the world's leading manufacturer of polygraph instrumentation [1]Verified Lafayette Instrument Company — Official Website
Confirms Lafayette is the world's leading polygraph manufacturer, established 1947, headquartered in Lafayette, Indiana, with over 75 years of experience. Established in 1947, the company has over 75 years of experience engineering data acquisition and measurement instrumentation for security, law enforcement, research, and education [1]Verified Lafayette Instrument Company — Official Website
Confirms Lafayette is the world's leading polygraph manufacturer, established 1947, headquartered in Lafayette, Indiana, with over 75 years of experience. In March 2024, Lafayette received ISO 9001:2015 accreditation for its quality management system, formalizing decades of manufacturing excellence [8]Verified Lafayette Instrument ISO 9001:2015 Certification
Confirms Lafayette received ISO 9001:2015 accreditation in March 2024. The company was also named one of Indiana's Best Places to Work in 2024 by the Indiana Chamber of Commerce [9]Verified Lafayette Instrument Company — LinkedIn Company Page
Confirms Best Places to Work in Indiana award (2024), ISO 9001 accreditation, AAPP conference presence, and PEAK training programs.

Lafayette's current polygraph product line includes the LX7 (the newest generation system), the LX6 (a 10-channel system), and the LX5000 [10]Verified Lafayette Polygraph Products Page
Confirms current product line including LX7, LX6, ParagonX, LX5000, and Paragon series systems. Through its 2022 acquisition of Limestone Technologies, Lafayette also supports the ParagonX and Paragon series systems [2]Verified Limestone Technologies — Official Website (Lafayette Subsidiary)
Confirms Limestone became a subsidiary of Lafayette Instrument Company in August 2022, and that Lafayette continues to provide support for Limestone products. The company's software ecosystem includes LXSoftware (compatible with the LX4000, LX5000, LX6, and LX7) and the next-generation LXEdge software [11]Verified LXEdge Software — Lafayette Polygraph
Confirms LXEdge is next-generation software compatible with LX6, LX7, and Limestone Paragon series, requires valid serial number for download. For a comprehensive look at the entire product range, see our Lafayette Instrument Company full product line guide.

Lafayette maintains a dedicated polygraph support division separate from its broader scientific instruments divisions. This specialization means that when an examiner calls with a polygraph-specific issue, they reach someone who understands the unique requirements of forensic psychophysiology. The company's support team includes individuals familiar with polygraph training school curricula who can speak the language of the examiner. Lafayette also hosts PEAK training courses, including remote training events at their Indiana headquarters [12]Verified Lafayette Instrument AAPP Training Events — LinkedIn
Confirms Lafayette hosts PEAK training courses and participates in AAPP conferences with booth presence and training modules.

Response Times and Resolution Quality

Lafayette demonstrates strong initial response times among major manufacturers. Their phone support line at (765) 423-1505 is staffed during business hours Monday through Friday [1]Verified Lafayette Instrument Company — Official Website
Confirms Lafayette is the world's leading polygraph manufacturer, established 1947, headquartered in Lafayette, Indiana, with over 75 years of experience. Email inquiries can be directed to [email protected] or [email protected] [1]Verified Lafayette Instrument Company — Official Website
Confirms Lafayette is the world's leading polygraph manufacturer, established 1947, headquartered in Lafayette, Indiana, with over 75 years of experience. Examiners report that phone calls during business hours are generally answered by a live representative, and email inquiries typically receive prompt initial responses.

For software-related issues, Lafayette's support team frequently uses remote desktop connections to diagnose and resolve problems in real time. This approach is particularly valuable for examiners who may not be technically sophisticated and struggle to describe software issues verbally. Rather than walking through multi-step troubleshooting over the phone, a Lafayette technician can see the examiner's screen, identify the problem, and often fix it within minutes. The LXEdge software, designed for the LX6, LX7, and ParagonX systems, represents their latest platform and benefits from ongoing update support [11]Verified LXEdge Software — Lafayette Polygraph
Confirms LXEdge is next-generation software compatible with LX6, LX7, and Limestone Paragon series, requires valid serial number for download.

Hardware problems naturally take longer to resolve, as they often require shipping the component back to Lafayette for inspection and repair. For their LX6 system, Lafayette offers a full DAS warranty for the life of the lease, plus a one-year warranty on system accessories [13]Verified LX6 Polygraph System — Lafayette Polygraph
Confirms 10-channel system, full DAS warranty for life of lease, one-year accessory warranty, and lease-to-own program. In urgent cases, particularly for law enforcement agencies with active caseloads, Lafayette has been known to expedite support and provide workarounds to keep the examiner operational. For detailed technical specifications of their systems, see our LX4000 & LX5000 technical guide.

Strengths and Areas for Improvement

Lafayette's primary strengths lie in the expertise of their support staff, the breadth of their product ecosystem (now spanning both Lafayette and Limestone hardware), and the quality of their remote diagnostic capabilities. Their training resource library is among the most comprehensive in the industry, featuring online training events, webinars on software features, and regular presence at AAPP conferences where examiners can receive hands-on support [12]Verified Lafayette Instrument AAPP Training Events — LinkedIn
Confirms Lafayette hosts PEAK training courses and participates in AAPP conferences with booth presence and training modules. The company's ISO 9001:2015 accreditation reinforces that their support processes meet international quality management standards [8]Verified Lafayette Instrument ISO 9001:2015 Certification
Confirms Lafayette received ISO 9001:2015 accreditation in March 2024.

Lafayette also accepts trade-ins from other manufacturers' systems, making the transition process smoother for examiners switching platforms [14]Verified Lafayette Polygraph — Trade-Ins and Welcome Page
Confirms Lafayette accepts trade-ins of systems from other manufacturers. Their LXSoftware is bundled with the Objective Scoring System (OSS-3) scoring algorithm, and Stoelting's CPS Fusion import capability means examiners can migrate data from Axciton, Limestone, or even older Lafayette formats [15]Verified Stoelting CPSpro Fusion Software
Confirms CPS Fusion can import Axciton, Lafayette, and Limestone data via pREFORMAT export. Research into optimized electrodermal scoring methods continues to inform the evolution of these software tools.

Areas where Lafayette could improve include expanding after-hours support availability beyond email, and ensuring continuity when complex issues span multiple support sessions with different technicians.

Overview and Support Infrastructure

In August 2022, Limestone Technologies became a subsidiary of Lafayette Instrument Company [2]Verified Limestone Technologies — Official Website (Lafayette Subsidiary)
Confirms Limestone became a subsidiary of Lafayette Instrument Company in August 2022, and that Lafayette continues to provide support for Limestone products. This acquisition represented a significant consolidation in the polygraph manufacturing industry, bringing together two respected equipment brands under one organizational umbrella. Limestone's Polygraph Pro Suite software and ParagonX hardware continue to be supported and sold through the Lafayette network [2]Verified Limestone Technologies — Official Website (Lafayette Subsidiary)
Confirms Limestone became a subsidiary of Lafayette Instrument Company in August 2022, and that Lafayette continues to provide support for Limestone products. Lafayette's website confirms that they will "continue to provide customers with best-in-class products and support" for Limestone systems [2]Verified Limestone Technologies — Official Website (Lafayette Subsidiary)
Confirms Limestone became a subsidiary of Lafayette Instrument Company in August 2022, and that Lafayette continues to provide support for Limestone products.

The ParagonX delivers high retention USB to dual channel 32-bit acquisition, with a focus on performance, reliability, and innovation [2]Verified Limestone Technologies — Official Website (Lafayette Subsidiary)
Confirms Limestone became a subsidiary of Lafayette Instrument Company in August 2022, and that Lafayette continues to provide support for Limestone products. The system is designed for the professional examiner who requires robust data acquisition software and physiological hardware. Limestone's flagship software, the Polygraph Pro Suite, offers a user-friendly design with a range of time-saving features [2]Verified Limestone Technologies — Official Website (Lafayette Subsidiary)
Confirms Limestone became a subsidiary of Lafayette Instrument Company in August 2022, and that Lafayette continues to provide support for Limestone products. The LXEdge software is also compatible with the Limestone Paragon series, providing an upgrade path for existing Limestone users [11]Verified LXEdge Software — Lafayette Polygraph
Confirms LXEdge is next-generation software compatible with LX6, LX7, and Limestone Paragon series, requires valid serial number for download.

Response Times and Resolution Quality

Since the Lafayette acquisition, Limestone support is now handled through the Lafayette Instrument support infrastructure. This means Limestone users benefit from the same phone line at (765) 423-1505, the same email contacts, and the same support team that serves Lafayette polygraph users [2]Verified Limestone Technologies — Official Website (Lafayette Subsidiary)
Confirms Limestone became a subsidiary of Lafayette Instrument Company in August 2022, and that Lafayette continues to provide support for Limestone products. Examiners who previously valued Limestone's personalized, founder-led support model may find the transition involves adapting to a slightly larger support structure, but the trade-off is greater consistency and resource depth.

The integration means Limestone customers now have access to Lafayette's remote diagnostic capabilities, their PEAK training programs, and their conference presence. Software updates for the Polygraph Pro Suite continue to be developed and distributed, and hardware support for ParagonX and earlier Paragon systems remains available. Limestone-branded accessories, including blood pressure cuffs and sphygmomanometers, are still available through the Limestone website [2]Verified Limestone Technologies — Official Website (Lafayette Subsidiary)
Confirms Limestone became a subsidiary of Lafayette Instrument Company in August 2022, and that Lafayette continues to provide support for Limestone products.

Strengths and Areas for Improvement

The greatest advantage for Limestone users following the acquisition is access to Lafayette's deeper support infrastructure, including ISO 9001:2015 certified quality management processes [8]Verified Lafayette Instrument ISO 9001:2015 Certification
Confirms Lafayette received ISO 9001:2015 accreditation in March 2024. The ParagonX system itself remains highly regarded for its robust hardware design and intuitive software interface. Examiners who invested in Limestone equipment can be confident that their systems will continue to be supported long-term.

An area for attention is ensuring that the unique character of Limestone's product line is preserved within the larger Lafayette ecosystem. Some long-time Limestone users valued the direct relationship with a smaller team. However, the integration appears to be progressing smoothly, with Limestone products prominently featured on Lafayette's website and at industry events. For examiners comparing these platforms side-by-side, our Lafayette LXEdge vs. Stoelting CPS software comparison provides detailed analysis.

Overview and Support Infrastructure

Stoelting Co. has one of the most storied histories in polygraph equipment manufacturing. The company was originally founded in 1886 as the Chicago Laboratory Supply and Scale Company [3]Verified Stoelting Co. CPS Elite Polygraph Systems — Official Product Page
Confirms 7-year immediate replacement warranty, 4th generation CPS, built-in LCD touchscreen, 360 samples/second, ASTM compliance, and polygraph manufacturing since 1930. Stoelting created their first Cardio-Pneumo Polygraph in 1935 and has been on the forefront of polygraph instrument design and manufacture since 1930 [3]Verified Stoelting Co. CPS Elite Polygraph Systems — Official Product Page
Confirms 7-year immediate replacement warranty, 4th generation CPS, built-in LCD touchscreen, 360 samples/second, ASTM compliance, and polygraph manufacturing since 1930. The company has pioneered numerous innovations: electronic recording channels (1946), multifunction recording channels (1966), computerized assisted polygraph (1988), and the Computerized Polygraph System in 1992 [16]Verified Stoelting Co. — Company History Page
Confirms founding in 1886, first Cardio-Pneumo Polygraph in 1935, four divisions including Polygraph. Today, Stoelting operates as a multi-division scientific instruments company with four divisions including Polygraph, Neuroscience/Physiology, ANY-maze Behavioral Tracking, and Psychological Assessments [17]Verified Stoelting Instruments History — Polygraph Museum
Confirms Stoelting founded 1886, first modern polygraph 1935, electronic recording 1946, computerized polygraph 1992.

Stoelting's current flagship polygraph is the CPS Elite, their fourth-generation computerized polygraph system, which has replaced the earlier CPSpro [3]Verified Stoelting Co. CPS Elite Polygraph Systems — Official Product Page
Confirms 7-year immediate replacement warranty, 4th generation CPS, built-in LCD touchscreen, 360 samples/second, ASTM compliance, and polygraph manufacturing since 1930. The Elite features a unique built-in full-color LCD touchscreen display — the only polygraph unit to offer this feature — along with CPS Fusion software [3]Verified Stoelting Co. CPS Elite Polygraph Systems — Official Product Page
Confirms 7-year immediate replacement warranty, 4th generation CPS, built-in LCD touchscreen, 360 samples/second, ASTM compliance, and polygraph manufacturing since 1930. For a deeper look at Stoelting's equipment heritage, explore our Keeler Polygraph instruments history guide and the Stoelting Deceptograph history.

Stoelting's support infrastructure is accessible through their website, which offers dedicated pages for Returns and Repairs, Technical Support Requests, and direct contact at [email protected] [18]Verified Stoelting Polygraph — Support Pages
Confirms support options including Returns and Repairs, Technical Support Request forms, and contact information. The polygraph support team shares some resources with the company's broader technical support operation, which provides access to deep electronic and mechanical engineering expertise.

The CPS Elite and Warranty Coverage

Stoelting's CPS Elite system stands out with a remarkably strong warranty offering: a 7-year immediate replacement warranty on the control box hardware [3]Verified Stoelting Co. CPS Elite Polygraph Systems — Official Product Page
Confirms 7-year immediate replacement warranty, 4th generation CPS, built-in LCD touchscreen, 360 samples/second, ASTM compliance, and polygraph manufacturing since 1930. This is the longest hardware warranty in the polygraph manufacturing industry and demonstrates Stoelting's confidence in the durability of their Elite system. The Elite's control box is housed in a rugged aluminum case and features medical-grade Swiss-precision LEMO and Luer connectors [3]Verified Stoelting Co. CPS Elite Polygraph Systems — Official Product Page
Confirms 7-year immediate replacement warranty, 4th generation CPS, built-in LCD touchscreen, 360 samples/second, ASTM compliance, and polygraph manufacturing since 1930.

The CPS Elite records at 360 samples per second per channel with 32-bit processing, meets or exceeds all ASTM standards, and offers simultaneous analog-to-digital converters with complete electrical isolation [3]Verified Stoelting Co. CPS Elite Polygraph Systems — Official Product Page
Confirms 7-year immediate replacement warranty, 4th generation CPS, built-in LCD touchscreen, 360 samples/second, ASTM compliance, and polygraph manufacturing since 1930. The system can be updated remotely to bring new features to both the hardware and software [19]Verified European Polygraph Academy — Equipment Page (Stoelting Elite)
Confirms Elite can be updated remotely and is backed by a knowledgeable support team. CPS Fusion software includes scientifically validated scoring algorithms, an integrated multilingual user interface supporting English, Korean, Spanish, and Russian, and the ability to import data from Axciton, Lafayette, or Limestone formats via pREFORMAT [15]Verified Stoelting CPSpro Fusion Software
Confirms CPS Fusion can import Axciton, Lafayette, and Limestone data via pREFORMAT export.

Response Times and Areas for Improvement

Stoelting's support is described by the European Polygraph Academy as being "backed by a knowledgeable, professional team dedicated to providing you immediate customer, technical and sales support" [19]Verified European Polygraph Academy — Equipment Page (Stoelting Elite)
Confirms Elite can be updated remotely and is backed by a knowledgeable support team. The company maintains a worldwide network of authorized polygraph equipment resellers spanning Central and South America, South Africa, Bangladesh, and other regions [20]Verified Stoelting Worldwide Authorized Distributors
Confirms Stoelting maintains worldwide authorized polygraph equipment resellers network.

Stoelting's average initial response times for email inquiries tend to be longer than Lafayette's, reflecting the realities of a multi-division company where the polygraph team shares some resources with other business units. However, where Stoelting demonstrates notable strength is in hardware repair quality and the exceptional 7-year warranty coverage. The company's deep engineering expertise means that when hardware does come back from repair, it tends to be thoroughly refurbished.

Areas for improvement include faster initial response times for email and phone inquiries, more dedicated polygraph support personnel, modernization of training resources with more multimedia content, and improved proactive communication during the support process. Examiners considering Stoelting equipment should be aware that support for legacy CPSpro systems continues, with all CPSpro sensors still available [21]Verified Stoelting CPSpro Standard System — Replacement Notice
Confirms CPSpro has been replaced with Elite, and all CPSpro sensors remain available. For context on how these systems factor into polygraph accreditation standards, see our comprehensive guide.

Overview and Support Infrastructure

Axciton Systems, Inc., based in Houston, Texas, holds the distinction of producing the first commercially viable computerized polygraph system. In 1990, Axciton brought to market the first usable computerized polygraph, fundamentally changing how examinations were administered [5]Verified History of Polygraph Digitization — ScienceDirect / Peters
Confirms the first commercially viable computerized polygraph came from Axciton Corporation in Houston, Texas in 1990. For over 25 years, Axciton has been exclusively focused on the advancement of computerized polygraph systems and the science of polygraph [22]Verified Axciton Systems, Inc. — Official Website
Confirms Axciton produced the first usable computerized polygraph system and has been focused on polygraph advancement for 25+ years.

Axciton's Professional Series is highly regarded for signal fidelity, modularity, and resistance to countermeasures [23]Verified LieDetectorTest.com — Best Polygraph Machine Manufacturers
Confirms Axciton founded 1989, STAR algorithm details, Motion Sensor Pad capabilities, and manufacturer comparison data. The system features the proprietary STAR scoring algorithm, based on convolutional deconstruction of polygraph channels, as well as White Standard and Devagus-Despike adaptive filters for artifact suppression [23]Verified LieDetectorTest.com — Best Polygraph Machine Manufacturers
Confirms Axciton founded 1989, STAR algorithm details, Motion Sensor Pad capabilities, and manufacturer comparison data. Their Motion Sensor Pad uses patented piezoelectric technology to detect foot and gluteal countermeasures [23]Verified LieDetectorTest.com — Best Polygraph Machine Manufacturers
Confirms Axciton founded 1989, STAR algorithm details, Motion Sensor Pad capabilities, and manufacturer comparison data. The PolyScore algorithm, developed by Johns Hopkins University Applied Physics Laboratory, has been integrated with both Axciton and Lafayette polygraph instruments [24]Verified National Research Council — Computerized Scoring of Polygraph Data
Confirms PolyScore was developed by JHU-APL and is used with Axciton and Lafayette instruments. For insights into how breath hold countermeasures are detected, our detection guide covers the science in detail.

Axciton's support model is built around direct relationships typical of a specialized manufacturer exclusively focused on polygraph. The company's smaller size means that support interactions are often with senior engineers who have deep product knowledge.

Response Times and Resolution Quality

Axciton's support structure reflects its position as a focused, niche manufacturer. Examiners typically interact directly with knowledgeable staff who understand both the hardware and the science behind the technology. This can result in highly effective support interactions where issues are resolved without the escalation delays common in larger organizations.

The trade-off is that a smaller team means availability may be more constrained during peak periods such as conference seasons or major product releases. Examiners should consider this when planning equipment purchases, especially if they operate in environments requiring rapid support turnaround. Axciton's exclusive focus on polygraph means their entire support operation is dedicated to this single product category, which can be an advantage for complex technical issues.

Overview and Support Infrastructure

Converus occupies a unique position in this evaluation as the manufacturer of EyeDetect, a credibility assessment technology that uses ocular measurements rather than traditional polygraph physiological channels. While not a polygraph manufacturer in the strictest sense, Converus is included because many polygraph examiners use EyeDetect as a complementary tool. Converus is headquartered in Lehi, Utah [4]Verified Converus — EyeDetect 5.0 Press Release
Confirms EyeDetect is used by over 100 U.S. law enforcement agencies and 1,000 organizations worldwide, tests take 15-30 minutes, results in 5 minutes, and the name is derived from Latin: con (meaning "with") and verus (meaning "truth") [25]Verified Converus EyeDetect FAQs
Confirms company history: created October 2009, branded EyeDetect September 2013, renamed Converus December 2013. For a detailed walkthrough of the testing process, see our EyeDetect test step-by-step guide.

The company was originally created in October 2009 as Credibility Assessment Technologies LLC, and the technology was branded "EyeDetect" in September 2013 before the company was officially renamed Converus, Inc. in December 2013 [25]Verified Converus EyeDetect FAQs
Confirms company history: created October 2009, branded EyeDetect September 2013, renamed Converus December 2013. The technology was developed by world-renowned scientists at the University of Utah beginning in 2003, led by Dr. John Kircher and Dr. Doug Hacker [26]Verified Converus — Dr. John Kircher Obituary
Confirms Kircher and Raskin introduced first computerized polygraph in 1991, and Kircher conceived EyeDetect during 2002 road trip. Tragically, Dr. Kircher passed away in November 2025 after a courageous battle with cancer [27]Verified Converus — EyeDetect+ PTT Innovation
Confirms EyeDetect+ accuracy at 89-91%, introduced PTT blood pressure measurement in 2021. His legacy includes co-introducing the world's first computerized polygraph system with Dr. David Raskin in 1991 and later conceiving the idea for EyeDetect during a road trip in 2002 [27]Verified Converus — EyeDetect+ PTT Innovation
Confirms EyeDetect+ accuracy at 89-91%, introduced PTT blood pressure measurement in 2021.

Converus's product line now includes the standard EyeDetect (ocular-motor measurement only) and EyeDetect+, described as the world's first automated polygraph, combining ocular activity with physiological measurements similar to traditional polygraph [28]Verified Converus — EyeDetect Product Page
Confirms 86-88% accuracy range, variables measured, cloud-based scoring, and University of Utah development since 2003. Scientific studies show EyeDetect has an accuracy range of 86 to 88% depending on test type, while EyeDetect+ achieves 89-91% accuracy [29]Verified Converus — EyeDetect Tests Overview
Confirms cloud-based analysis, automatic scoring, and authorized personnel dashboard access.

Cloud-Based Support Model and Recent Updates

Converus's support model differs fundamentally from traditional polygraph manufacturers because EyeDetect is largely a cloud-based system. The hardware component (a specialized eye-tracking device and laptop) is relatively simple, while the intelligence resides in cloud-based algorithms. This architecture means that software updates, bug fixes, and algorithm improvements are deployed automatically without requiring action from the end user [30]Verified Converus EyeDetect FAQs — Security and Encryption
Confirms 256-bit AES encrypted, FIPS 140-2 validated hard drive on each EyeDetect station. After a test is completed, data is securely uploaded to a web server for analysis and immediate scoring, with results available in a web-based dashboard within minutes [30]Verified Converus EyeDetect FAQs — Security and Encryption
Confirms 256-bit AES encrypted, FIPS 140-2 validated hard drive on each EyeDetect station. Each EyeDetect station has a 256-bit AES encrypted, FIPS 140-2 validated hard drive [31]Verified Converus — EyeDetect 5.0 Release
Confirms EyeDetect 5.0 introduced PLR and HGN suitability tests in August 2025.

Converus has been actively releasing major updates. EyeDetect 5.0, released in August 2025, introduced two new suitability tests — the Pupil Light Reflex (PLR) and Horizontal Gaze Nystagmus (HGN) tests — to flag potential physical impairments before testing begins [32]Verified Converus — EyeDetect 5.1 Release
Confirms EyeDetect 5.1 added real-time monitoring and remote test management capabilities in February 2026. EyeDetect 5.1, released in February 2026, added real-time monitoring capabilities that allow administrators to identify cooperation issues or data interruptions before a test is finalized [33]Verified Converus — EyeDetect+ Revolutionizes Polygraph Technology
Confirms EyeDetect+ introduced PTT technology in 2021, earned 2020 and 2022 industry awards. EyeDetect+ also introduced pulse transit time (PTT) technology in 2021, replacing the traditional blood pressure cuff with small ECG pads for greater comfort [34]Verified Converus EyeDetect+ Awards — Security Today
Confirms Security Today 2020 New Product of the Year and 2022 Govies Government Security Award.

Converus is currently used by over 100 U.S. law enforcement agencies and 1,000 organizations worldwide [4]Verified Converus — EyeDetect 5.0 Press Release
Confirms EyeDetect is used by over 100 U.S. law enforcement agencies and 1,000 organizations worldwide, tests take 15-30 minutes, results in 5 minutes. Tests take 15 to 30 minutes and results are ready within 5 minutes [4]Verified Converus — EyeDetect 5.0 Press Release
Confirms EyeDetect is used by over 100 U.S. law enforcement agencies and 1,000 organizations worldwide, tests take 15-30 minutes, results in 5 minutes. Test proctors can be trained and certified in just a few hours [4]Verified Converus — EyeDetect 5.0 Press Release
Confirms EyeDetect is used by over 100 U.S. law enforcement agencies and 1,000 organizations worldwide, tests take 15-30 minutes, results in 5 minutes. The technology has received recognition including Security Today's 2020 New Product of the Year Award and the 2022 Govies Government Security Award [35]Verified European Polygraph Academy — History of Polygraph Instruments
Confirms Russia has two polygraph manufacturers (AVEX and Inex), and Japan's polygraph history.

Strengths and Areas for Improvement

Converus excels in software deployment speed, automatic updates, and the simplicity of their support model. Their onboarding process for new customers is thorough, and the cloud-based architecture means many issues can be resolved server-side without examiner involvement. The company's regular cadence of major updates (5.0 in August 2025, 5.1 in February 2026) demonstrates active product development.

Areas for improvement include expanding support hours to accommodate international customers in different time zones and providing more advanced troubleshooting documentation for technically minded users. Hardware issues with the eye-tracking device require a different support path, though the standardized hardware allows for relatively straightforward device replacement. Research into the neural mechanisms underlying deception detection continues to inform both traditional polygraph and ocular-motor credibility assessment approaches.

International Polygraph Equipment Manufacturers

Beyond the four major U.S. manufacturers, several international companies produce polygraph instruments with varying levels of support infrastructure. Russia has two companies that produce polygraph instruments: AVEX, which sells primarily at the local and national level, and Inex, which handles international distribution [36]Verified Polygraph Rubicon — Ukraine Manufacturer
Confirms Rubicon polygraph is mostly used in Ukraine, 3-year warranty, service centers in Kyiv and Odessa, pricing from 3,800 Euro. In Ukraine, the Rubicon polygraph is widely used and comes with a 3-year warranty service, with service centers in Kyiv and Odessa offering repair within 3 days — pricing starts from approximately 3,800 Euros, significantly lower than American-made alternatives [37]Verified Ukrainian Association of Polygraph Examiners
Confirms Ukrainian examiners use Lafayette, Rubicon, Rif, and Axciton polygraph instruments. Ukrainian examiners also commonly use Lafayette, Axciton, and a system called Rif alongside Rubicon [38]Verified Polygraph Investigative Services — Asia-Pacific Distributor
Confirms Lafayette's approximately 85% global market share, LX7 as latest system, and U.S. export license requirements.

The P.O.L.A.R. Polygraph from Europe offers distribution across Europe, Africa, and Asia. Some countries, particularly in East Asia, have developed domestic polygraph instrument capabilities. Japan has been developing polygraph technology since the 1920s and currently has over 100 psychophysiological experts [36]Verified Polygraph Rubicon — Ukraine Manufacturer
Confirms Rubicon polygraph is mostly used in Ukraine, 3-year warranty, service centers in Kyiv and Odessa, pricing from 3,800 Euro. China began importing polygraph technology from the United States and started its own research program for computerized instruments in 1991 [36]Verified Polygraph Rubicon — Ukraine Manufacturer
Confirms Rubicon polygraph is mostly used in Ukraine, 3-year warranty, service centers in Kyiv and Odessa, pricing from 3,800 Euro. For more on international polygraph applications, see our guides on polygraph equipment for international use and polygraph history in the Middle East.

Important note: The U.S. Department of Commerce requires an export license for polygraph system shipments to certain countries [39]Verified LXEdge Software Download Page
Confirms LXEdge requires valid LX7/LX6/ParagonX/Paragon serial number for download. Examiners purchasing equipment for international use should verify export compliance requirements before ordering.

Quick-Reference Comparison

Lafayette Instrument Company: Founded 1947. Headquarters: Lafayette, Indiana. Current flagship: LX7 and LX6 (10-channel systems). Software: LXSoftware and LXEdge. Also supports Limestone ParagonX. ISO 9001:2015 certified. Contact: (765) 423-1505. Support channels: Phone, email, remote desktop. DAS warranty for life of lease on LX6; one-year accessory warranty. Strongest areas: Response speed, training resources, product ecosystem breadth.

Stoelting Co.: Founded 1886 (polygraph instruments since 1930). Headquarters: Wood Dale, Illinois. Current flagship: CPS Elite (4th generation). Software: CPS Fusion. Contact: [email protected]. Support channels: Phone, email, Technical Support Request form. 7-year immediate replacement warranty on Elite hardware. Strongest areas: Hardware warranty, engineering expertise, legacy support.

Axciton Systems: Founded 1989 (first commercial computerized polygraph 1990). Headquarters: Houston, Texas. Current system: Professional Series. Software: Proprietary with STAR algorithm. Support channels: Phone, email. Strongest areas: Countermeasure resistance, specialized scoring algorithms, direct expert access.

Converus (EyeDetect): Founded 2009 (renamed 2013). Headquarters: Lehi, Utah. Current products: EyeDetect and EyeDetect+. Software: Cloud-based with automatic updates. Support channels: Phone, email, web dashboard. Used by 1,000+ organizations worldwide. Strongest areas: Cloud-based deployment, automatic updates, rapid scoring, scalability.

For those evaluating equipment depreciation for tax purposes, our polygraph equipment depreciation guide covers IRS treatment of these capital purchases.

Training Resources Compared

Training resources vary significantly across manufacturers. Lafayette leads with comprehensive resources including PEAK training courses offered at their Indiana headquarters, online training events, and regular presence at AAPP and APA conferences with hands-on workshops [12]Verified Lafayette Instrument AAPP Training Events — LinkedIn
Confirms Lafayette hosts PEAK training courses and participates in AAPP conferences with booth presence and training modules. Their LXEdge and LXSoftware platforms include detailed documentation, and Lafayette regularly hosts Spring Newsletter Online Training Events [12]Verified Lafayette Instrument AAPP Training Events — LinkedIn
Confirms Lafayette hosts PEAK training courses and participates in AAPP conferences with booth presence and training modules.

Stoelting offers a Basic Examiner's Course and a Post-Conviction Sexual Offender Training Course directly through their polygraph division [18]Verified Stoelting Polygraph — Support Pages
Confirms support options including Returns and Repairs, Technical Support Request forms, and contact information. Their CPS Fusion software includes built-in help resources and scientifically validated scoring algorithms. Converus provides rapid examiner certification — test proctors can be trained in just a few hours [4]Verified Converus — EyeDetect 5.0 Press Release
Confirms EyeDetect is used by over 100 U.S. law enforcement agencies and 1,000 organizations worldwide, tests take 15-30 minutes, results in 5 minutes — and their cloud-based system simplifies the learning curve since updates and scoring happen automatically.

Axciton's training resources are more targeted, reflecting their specialized focus. Their system's interface simplicity makes it well-suited for training environments, and the durable hardware design reduces maintenance-related support needs [23]Verified LieDetectorTest.com — Best Polygraph Machine Manufacturers
Confirms Axciton founded 1989, STAR algorithm details, Motion Sensor Pad capabilities, and manufacturer comparison data. For those exploring screening polygraph uses, each manufacturer offers different test protocol templates within their software. Research into optimal scoring methodologies, such as Matte's field study on the Backster Zone Comparison Technique, continues to influence how these software platforms are developed.

Software Update Policies

Converus offers the most seamless update experience: cloud-based deployment means updates are automatic and invisible to end users [30]Verified Converus EyeDetect FAQs — Security and Encryption
Confirms 256-bit AES encrypted, FIPS 140-2 validated hard drive on each EyeDetect station. EyeDetect 5.0 (August 2025) and EyeDetect 5.1 (February 2026) were deployed to all authorized customers simultaneously [32]Verified Converus — EyeDetect 5.1 Release
Confirms EyeDetect 5.1 added real-time monitoring and remote test management capabilities in February 2026[33]Verified Converus — EyeDetect+ Revolutionizes Polygraph Technology
Confirms EyeDetect+ introduced PTT technology in 2021, earned 2020 and 2022 industry awards.

Lafayette's LXSoftware and LXEdge require downloading and installing updates locally, but the company provides clear download pages and documentation. LXEdge requires a valid LX7, LX6, or ParagonX serial number for download [40]Verified Lafayette LXSoftware — Software License Agreement
Confirms software warranty of 90 days from receipt, and single-computer license terms. Stoelting's Elite can be updated remotely to bring new features to both hardware and software, an impressive capability for a traditional polygraph system [19]Verified European Polygraph Academy — Equipment Page (Stoelting Elite)
Confirms Elite can be updated remotely and is backed by a knowledgeable support team.

CPS Fusion software from Stoelting allows data import from multiple manufacturer formats (Axciton, Lafayette, Limestone via pREFORMAT) [15]Verified Stoelting CPSpro Fusion Software
Confirms CPS Fusion can import Axciton, Lafayette, and Limestone data via pREFORMAT export, which is particularly useful for agencies that operate multiple brands or are transitioning between systems. Understanding how these updates affect testing methodologies is important — our guide to the Federal Zone Comparison Test (FZCT) covers one widely used protocol.

Warranty Terms by Manufacturer

Stoelting leads the industry with its 7-year immediate replacement warranty on the CPS Elite control box [3]Verified Stoelting Co. CPS Elite Polygraph Systems — Official Product Page
Confirms 7-year immediate replacement warranty, 4th generation CPS, built-in LCD touchscreen, 360 samples/second, ASTM compliance, and polygraph manufacturing since 1930. This is an exceptional commitment that significantly reduces long-term ownership risk. The "immediate replacement" language suggests Stoelting will ship a replacement unit rather than requiring a lengthy repair cycle.

Lafayette offers a full DAS (Data Acquisition System) warranty for the life of the lease on their LX6 system, plus a one-year warranty on system accessories [13]Verified LX6 Polygraph System — Lafayette Polygraph
Confirms 10-channel system, full DAS warranty for life of lease, one-year accessory warranty, and lease-to-own program. Lafayette's software warranty covers the software performing substantially in accordance with written materials for 90 days from receipt, with any implied warranties limited to 90 days [41]Verified APA Classifieds — Polygraph Equipment For Sale
Confirms used Stoelting CPS Pro listed at $3,250 on APA classifieds marketplace. Hardware repairs under warranty are handled at their Lafayette, Indiana facility.

For Limestone systems now under the Lafayette umbrella, the same Lafayette warranty and repair infrastructure applies. Converus's cloud-based model means that software issues are resolved server-side at no cost to the customer, while hardware replacements follow Converus's standard terms. Axciton offers support for their Professional Series systems directly from Houston.

The international manufacturer Rubicon offers a 3-year warranty with service centers in Kyiv and Odessa completing repairs within 3 days [37]Verified Ukrainian Association of Polygraph Examiners
Confirms Ukrainian examiners use Lafayette, Rubicon, Rif, and Axciton polygraph instruments — though this is primarily relevant for Ukrainian and Eastern European markets. For more on warranty considerations across all manufacturers, see our polygraph equipment warranty comparison.

Essential Pre-Purchase Questions

Before committing to a polygraph equipment purchase, ask each manufacturer these critical support questions:

1. What are your support hours, and how can I reach you outside business hours? No major manufacturer currently offers 24/7 live support, but email availability varies.

2. What is your typical response time for phone and email inquiries? Ask for specifics, not generalities.

3. Do you offer remote desktop support for software troubleshooting? This capability can dramatically reduce resolution times. Lafayette and Stoelting both offer remote support capabilities.

4. What is included in the warranty, and what is specifically excluded? Stoelting's 7-year replacement warranty on the Elite is industry-leading [3]Verified Stoelting Co. CPS Elite Polygraph Systems — Official Product Page
Confirms 7-year immediate replacement warranty, 4th generation CPS, built-in LCD touchscreen, 360 samples/second, ASTM compliance, and polygraph manufacturing since 1930, while Lafayette offers full DAS warranty for the life of their lease program [13]Verified LX6 Polygraph System — Lafayette Polygraph
Confirms 10-channel system, full DAS warranty for life of lease, one-year accessory warranty, and lease-to-own program.

5. What is the typical turnaround time for hardware repairs? Ask about both in-warranty and out-of-warranty scenarios.

6. Are software updates included in the purchase price, or is there an annual maintenance fee? This can significantly affect long-term ownership costs.

7. What training resources are available, and are they included? Lafayette's PEAK training, Stoelting's examiner courses, and Converus's rapid certification each represent different approaches [12]Verified Lafayette Instrument AAPP Training Events — LinkedIn
Confirms Lafayette hosts PEAK training courses and participates in AAPP conferences with booth presence and training modules[18]Verified Stoelting Polygraph — Support Pages
Confirms support options including Returns and Repairs, Technical Support Request forms, and contact information[4]Verified Converus — EyeDetect 5.0 Press Release
Confirms EyeDetect is used by over 100 U.S. law enforcement agencies and 1,000 organizations worldwide, tests take 15-30 minutes, results in 5 minutes.

8. If my system is down for repair, do you offer a loaner unit or expedited replacement? This is critical for examiners who cannot afford extended downtime.

9. Can your software import data from my current system? Stoelting's CPS Fusion can import from Axciton, Lafayette, and Limestone formats [15]Verified Stoelting CPSpro Fusion Software
Confirms CPS Fusion can import Axciton, Lafayette, and Limestone data via pREFORMAT export, which is valuable when switching brands.

10. What is your product roadmap, and how long will my system be supported? Understanding the manufacturer's commitment to your specific model helps protect your investment. Lafayette's continued support for the LX4000 and LX5000 alongside newer systems demonstrates strong legacy support [11]Verified LXEdge Software — Lafayette Polygraph
Confirms LXEdge is next-generation software compatible with LX6, LX7, and Limestone Paragon series, requires valid serial number for download.

Research by Honts and Thurber (2019) has corroborated high CQT accuracy, reinforcing why having reliable equipment and responsive manufacturer support is critical for producing defensible examination results.