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Lie Detector, Polygraph: Products

The Polygraph, also known as the Lie Detector, is a scientific instrument capable of simultaneously recording changes in several physiological variables while the subject is asked a series of questions pertaining to a specific issue under investigation.

The charts generated during the polygraph examination are interpreted by a polygraph examiner.

ARGO-A is the authorized representative of Lafayette Instrument Company polygraphs in Azerbaijan, Armenia, Belarus, Estonia, Georgia, Kazakhstan, Kyrgyzstan, Latvia, Lithuania, Moldova, Russia, Tajikistan, Turkmenistan, Ukraine, Uzbekistan and a number of other countries. Lafayette Instrument Company is the global leader in the manufacture and sale of polygraphs with a global polygraph market share of approximately 90%.

Lafayette Instrument Company produced its first lie detector (polygraph) in the early 1950’s. The company's polygraph instrumentation is preferred by polygraph examiners from the 90 countries using polygraphs. For the past several years Ukraine has led European nations in the purchase of Lafayette Instrument Company computerized polygraphs.

Polygraphs, Lie Detectors

  • Computerized Polygraph LX4000-SW - Model AA87100
    Model LX4000-S
    The LX4000-S is the best and most popular computerized polygraph (lie detector) in the world capable of simultaneously recording changes in several physiological variables while the subject is asked a series of questions pertaining to a specific issue under investigation. The charts generated during the polygraph examination are interpreted by a polygraph examiner.
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  • Computerized Polygraph LX5000-SW - Model AA87101
    Model LX5000-S
    The Computerized Polygraph LX5000-S is the world's most advanced polygraph (lie detector) designed to record, store, and analyze physiological changes during a polygraph examination. It combines conventional polygraph procedure with a sophisticated state-of-the-art computer. With the basic system a total of nine channels can be recorded at one time.
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Polygraph Accessories

  • Photoelectric Plethysmograph for LX5000-SW - Model AA87123
    Model 76604A-5L
    The Photoelectric Plethysmograph for LX5000-S and LX4000-S (used with an adaptor 76604ADP) polygraphs is a finger sensor used to measure the rapidly occurring relative changes in pulse blood volume. It utilizes a photosensitive cell to measure light reflected or passed through the tissue segment where the monitor is placed.
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  • Photoelectric Plethysmograph for LX4000-SW - Model AA87139
    Model 76604USA
    The Photoelectric Plethysmograph for the LX4000-SW polygraph (with LX4000B DAS) is a finger sensor used to measure the rapidly occurring relative changes in pulse blood volume. It utilizes a photosensitive cell to measure light reflected or passed through the tissue segment where the monitor is placed.
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  • Photoelectric Plethysmograph for LX4000-SW - Model AA87139
    Model 76604US
    The Photoelectric Plethysmograph for the LX4000-SW polygraph (with LX4000A DAS) is a finger sensor used to measure the rapidly occurring relative changes in pulse blood volume. It utilizes a photosensitive cell to measure light reflected or passed through the tissue segment where the monitor is placed.
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  • Photoelectric Plethysmograph for LX4000-SW - Model AA87139
    Model 76879HM-A
    The Masseter Headphone System (MHS) is designed to detect and record movements in the Masseter muscle of the mandibular region during the recording phase of a polygraph examination, sensing activities of the tongue, clenching of teeth, and other jaw-line actions.
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  • Pump Bulb Assembly for LX4000-SW - Model AA87110
    Model 76506LX
    The Pump Bulb Assembly is a high quality sphygmomanometer assembly for LX3000 and LX4000A polygraph systems, which integrates into a single mechanism the following components: a pump bulb with bleed valve, plastic locking pinch clip, rubber tubing and a bronze quick connect.
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  • Pump Bulb Assembly for LX5000-SW - Model AA87117
    Model 76506A-5
    This is a high quality sphygmomanometer assembly for LX4000B and LX5000 polygraph systems, which integrates into a single mechanism the following components: a pump bulb with bleed valve, plastic locking pinch clip, rubber tubing and a Leur-lock connector.
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  • Electronic “Blue” Pneumo Assembly for LX5000-SW - Model AA87121
    Model 76513A-T
    Pneumo Chest Assembly (Titanium) is a pressure sensor for measuring respiration rate of a subject during a polygraph examination. Used with the LX5000-S and LX4000-S (with the new LX4000 DAS) polygraphs. It is 1.9 cm in diameter, 33 cm extended and 20 cm relaxed.
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  • Electronic “Titanium” Pneumo Assembly for LX5000-SW - Model AA87122
    Model 76513A-B
    Pneumo Chest Assembly (Blue) is a pressure sensor for measuring respiration rate of a subject during a polygraph examination. Used with the LX5000-S and LX4000-S (with the new LX4000 DAS) polygraphs. It is 1.9 cm in diameter, 33 cm extended and 20 cm relaxed.
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  • Pneumatic “Blue” Pneumo Assembly for LX5000-SW - Model AA87119
    Model 76513-1G
    Pneumo Chest Assembly (Gold) is a pressure sensor for measuring respiration rate of a subject during a polygraph examination. Used with the LX4000-SW (with the old LX4000 DAS). It is 1.9 cm in diameter, 33 cm extended and 20 cm relaxed. There is a 116.8 cm beaded chain and 213.4 cm of rubber tubing.
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  • Pneumatic “Titanium” Pneumo Assembly for LX5000-SW - Model AA87120
    Model 76513-2B
    Pneumo Chest Assembly (Bronze) is a pressure sensor for measuring respiration rate of a subject during a polygraph examination. Used with the LX4000-SW (with the old LX4000 DAS). It is 1.9 cm in diameter, 33 cm extended and 20 cm relaxed. There is a 116.8 cm beaded chain and 213.4 cm of rubber tubing.
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  • Activity Sensor Pad - Model AA87125
    Model 76879S
    Used with Lafayette Instrument Company's polygraphs. Designed to detect subtle movements, as well as gross movements, of a subject during a polygraph examination. It allows the polygraph examiner to concentrate on administering the exam instead of trying to observe the subject's movement.
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  • Activity Sensor Arm Pads - Model AA87126
    Model 76879A
    The Activity Sensor Arm Pads are utilized with Lafayette Instrument Company’s computerized polygraphs and are designed to detect subtle, as well as gross movements of shoulders, forearms, and hands of the subject during a polygraph examination.
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  • Activity Sensor Feet Pads - Model AA87127
    Model 76879F
    The Activity Sensor Feet Pads are utilized with Lafayette Instrument Company's computerized polygraphs and are designed to detect subtle, as well as gross movements of feet and toes of the subject during a polygraph examination. The sensors are placed on the floor and the examinee's feet set upon them.
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  • Activity Sensor Feet Pad - Model AA87179
    Model 76871FS
    The Activity Sensor Feet Pad is incased in metal instead of fabric pouches, for added durability. It is utilized to detect subtle, as well as gross movements of toes, feet, and legs of the subject during a polygraph test. The Activity Sensor Feet Pad is used with the Adjustable-Arm Subject’s Chair (Vinyl).
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  • Calibrator for Computerized Systems - Model AA87151
    Model 76740LX
    This stand-alone calibrator is a precision instrument designed to test the operating efficiency of all makes and brands of conventional and computerized polygraphs. This calibrator is capable of checking the pneumo, cardio and EDA/GSR components against factory standards.
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  • Standard Kovacic Arm Cuff for LX4000-SW - Model AA87109
    Model 76530
    Lafayette Instrument Company patented standard blood pressure Kovacic-style cuff for the LX4000-SW (with the old LX4000 DAS) computerized polygraph eliminates problems associated with a loosely wrapped cuff and ensures that the cuff does not shift away from the brachial artery during application.
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  • Arm Cuff for LX5000-SW - Model AA87118
    Model 76530A-5
    Lafayette Instrument's patented standard arm cuff for the LX5000-S and LX4000-S (with the new LX4000 DAS) computerized polygraphs eliminates problems associated with a loosely wrapped cuff and ensures that the cuff does not shift away from the brachial artery during application.
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  • Finger Cuff for LX5000-SW - Model AA87178
    Model 76535A-5
    This lightweight and portable polygraph finger cuff was designed to improve the examinee’s comfort during a polygraph examination by creating less pressure. Used as an alternative to the standard arm cuff. Used with the LX5000-S and LX4000-S (with the new LX4000 DAS) polygraphs.
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  • Finger Cuff for LX4000-SW - Model AA87148
    Model 76535
    This lightweight and portable polygraph finger cuff was designed to improve the examinee’s comfort during a polygraph examination by creating less pressure. Used as an alternative to the standard arm cuff, such as the Kovacic Arm Cuff. Used with the LX4000-SW (with the old LX4000 DAS).
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  • Additional Cuffs - Model AA87147
    Model 76531
    Depending upon the nature of the situation, three additional cuffs can be utilized for measuring the arterial blood pressure of an examinee during a polygraph exam: 1) Kovacic Forearm Cuff (18-26 cm), model 76531, 2) Kovacic Wrist Cuff (10-14 cm), model 76532, and 3) Kovacic Large Arm Cuff (33-47 cm), model 76534.
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  • Golden Universal Accu-Cuff - Model AA87146
    Model 76530AC
    The cuff for computerized polygraphs fits a large variety of arm sizes, from smallest to largest. This cuff has a metal clip, which makes it more adjustable, easier to fit, and more user friendly than the Standard Kovacic Arm Cuff.
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  • Rakes Deluxe Forearm Cuff - Model AA87145
    Model 76531BR
    Rakes Deluxe Forearm Cuff consists of two components: a forearm cuff and a metal stand. The metal stand has an indentation which accepts the forearm cuff. This design allows for the elimination or reduction of pressure naturally applied on the cuff by the arm's weight, and prevents the restriction of blood flow.
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  • Vital Parts Kit with 76640DP - Model AA87137
    Model 76713A-5
    This Vital Parts Kit for LX5000 and LX4000B polygraph systems is for polygraph examiners using the Electrodermal Activity (EDA) Disposable Finger Electrode Set, model 76642D, and the EDA Snap Finger Electrodes, model 76642SP.
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  • Vital Parts Kit with 76640DP - Model AA87137
    Model 76713DLXSA
    This Vital Parts Kit for the LX4000-SW (with the LX4000A DAS only) computerized polygraph is for polygraph examiners using the Electrodermal Activity (EDA) Disposable Finger Electrodes, model 76642D.
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  • Vital Parts Kit with 76640DP - Model AA87137
    Model 76713DLXDP
    This Vital Parts Kit for LX4000-SW (with the old LX4000A DAS) and LX3000-SW computerized polygraphs is for polygraph examiners using the stainless steel Electrodermal Activity (EDA) Finger Electrode Set, model 76640DP.
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  • Vital Parts Kit with 76640SO - Model AA87138
    Model 76713DLXSO
    This Vital Parts Kit for LX4000-SW (with the old LX4000A DAS) and LX3000-SW computerized polygraphs is for polygraph examiners using the Electrodermal Activity (EDA) Disposable Finger Electrode Set, model 76640SO.
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  • USB Webcam with Focus and Microphone - Model AA87131
    Model LX-WEBCAM
    LX Operating Software allows a polygraph examiner to record (with sound) a polygraph session on a computer screen using an inexpensive digital camera (QuickCam Pro 4000 Logitech). Video recording is synchronized with a polygraph chart and the recording can be played back.
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  • Fingerprint/Signature Scanner - Model AA87129
    Model LXSIGPRINT
    The Fingerprint/Signature Scanner is a high-quality, high-resolution Electronic Signature pad and integrated fingerprint sensor. It will capture and recognize signature and fingerprint imaging. Allows recording fingerprints of both polygraph examiners and subjects for identification purposes.
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  • GSR Cable for LX5000-SW - Model AA87128
    Model 76643A-5L
    Generally, the EDA Cable is supplied with the EDA Assembly for LX5000-S and LX4000-S (with the new LX4000B DAS), model 76640A-5L, along with stainless steel EDA snap-on finger plates and disposable EDA sensors (electrodes). It can be purchased separately as well.
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  • GSR Assembly for LX5000-SW - Model AA87124
    Model 76640A-5L
    The EDA Assembly for LX5000-S and LX4000-S (with the new LX4000B DAS) consists of the following components: EDA Cable, model 76643A-5L, Disposable EDA Electrodes, model 76642D, and EDA Snap Finger Electrodes (set of two), model 76642SP.
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  • EDA Finger Electrode Set for LX4000-SW - Model AA87108
    Model 76640DP
    The EDA Finger Electrode Set for registering electrodermal activity (EDA) has been designed for maximum efficiency and serviceability. The 76640DP consists of a cable and two finger plates made of stainless steel and fitted with Velcro tape.
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  • EDA Electrode Cable - Model AA87141
    Model 76643SO
    Generally, the EDA Electrode Cable, model 76643SO, is supplied with the Lafayette EDA Cable with Snap Reusable Electrodes, model 76640SP, and the Disposable EDA Electrodes, model 76640SO.
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  • EDA Cable with Snap Reusable Electrodes - Model AA87140
    Model 76640SP
    The Lafayette EDA Cable with Snap Reusable Electrodes has been designed for maximum efficiency and serviceability.The set consists of two stainless steel finger plates fitted with Velcro tape and one EDA Electrode Cable.
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  • EDA Snap Finger Electrodes - Model AA87182
    Model 76642SP
    The 76642SP set consists of two stainless steel finger plates fitted with Velcro tape. The two finger plates are placed on the subject's index and ring fingers of the right hand during a polygraph examination.
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  • Disposable EDA Electrodes - Model AA87143
    Model 76642D
    The 76642D consists of a package of 100 Ag/AgCl EDA (Electrodermal Activity) disposable snap electrodes for measuring EDA of subjects undergoing polygraph examination. These electrodes are pre-gelled, hypoallergenic, and latex free.
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  • Disposable EDA Electrodes - Model AA87142
    Model 76640SO
    This kit for measuring electrodermal activity (EDA) includes a package of 100 Ag/AgCl EDA disposable snap electrodes, model 76642D, and an EDA electrode cable, model 76643SO.
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  • Electrode Gel - Model AA87144
    Model 76246
    This multi-purpose Ag/AgCl electrode conductivity gel is highly conductive, chloride free and hypoallergenic. Its non-thinning formula will not irritate and will resist breakdown from body heat and salts in perspiration and will remain moist, thick and uniformly conductive throughout the most prolonged polygraph examination.
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  • Portable Subject's Chair - Model AA87155
    Model 76877P
    This lightweight folding chair with a cushioned seat is useful for the examiner whose profession takes him into many unknown field testing situations. The Portable Subject’s Chair design emphasizes comfort and durability. It weighs only 9.7 kg, has a high weight capacity, folds easily, and will fit in any vehicle for transport. The height of chair arms is easily adjusted depending on the height and size of the examinee.
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  • Adjustable-Arm Subject's Chair (Vinyl) - Model AA87152
    Model 76870V
    The subject's chair is built to orthopedic standards to ensure proper posture and back support. Thanks to the optimal chair design, the arm cuff placed around the subject's arm does not touch her body, which maximizes the obtainment of an objective polygraph examination result.
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  • Portable Carrying Case - Model AA87163
    Model LX-1050
    The Deluxe 17" Leather Notebook Case brings together the most popular features of our original Leather Notebook Case and a more spacious design able to accommodate larger screen notebooks. The removable mesh accessory pouch and divided, expandable file section provide added functionality and storage space.
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  • Carrying Case with Wheels - Model AA87162
    Model LX-1055
    This case combines the features of the XL Notebook Case with rolling capabilities for travel ease. With its 91.4 cm telescoping handle, "in-line skate" wheels, air cushion protection system and ample storage space, this rolling notebook case is the easiest way to transport all of your mobile computing essentials.
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  • Large Pelican Case with Wheels - Model AA87159
    Model LX-1065
    This case is a standard rolling transport case for computerized polygraph systems. This watertight, crushproof, and dust proof case, complete with front handle and convenient extension handle, is the perfect rolling travel companion.
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  • Small Pelican Case - Model AA87160
    Model LX-1060
    This hard case is virtually unbreakable, airtight, waterproof, and totally guaranteed. The 0.25-inch (0.635 cm) o-ring seal includes a pressure release valve for adjusting atmospheric pressure change.
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  • Portable Thermal Printer - Model AA87156
    Model LX-1575*C
    At barely over 26 cm long and 0.45 kg in weight, including the battery, the Pentax PocketJet II fits easily into your briefcase, computer bag, or can be quickly mounted in any vehicle or small work area. Prints laser-quality reports and continuous real-time charts.
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  • Paper Holder for Pentax Printer - Model AA87157
    Model LX-1575PPH
    This optional small paper stand is strongly recommended for use with the Pentax PocketJet II, LX-1575*C. It holds both roll thermal paper and the Pentax PocketJet II printer. Manufactured by Lafayette Instrument Company.
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  • Carrying Pouch for LX4000 - Model AA87158
    Model LX-4000P
    This black compact “Lafayette Instrument LX4000” carrying pouch with a Velcro flap provides complete protection for the LX4000A Data Acquisition System (DAS). Protects the DAS from scratches, impact, dust, and other particles.
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  • Carrying Pouch for LX5000
    Model LX-5000P
    This black compact “Lafayette Instrument LX5000” carrying pouch with a Velcro flap provides complete protection for the LX5000 Data Acquisition System (DAS). Protects the DAS from scratches, impact, dust, and other particles.
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  • Polygraph Exam Soundmasker - Model AA87169
    Model AA87169
    A quiet environment free of distractions is essential for polygraph testing. According to the APA Standards of Practice “conditions under which polygraph testing occurs are required to be free from distractions that would interfere with the ability of the examinee to appropriately focus during the examination process”.
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  • Polygraph Exam Portable Eavesdropping Protection Package - Model AA87170
    Model AA87170
    The Polygraph Exam Portable Eavesdropping Protection Package is a complete, compact, portable eavesdropping protection system designed for offsite applications. It offers the ability to quickly secure an environment against human and electronic eavesdropping, as well as advanced signal recovery techniques.
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  • Sensor Storage Pouch - Model AA87132
    Model LX-1045
    The Sensor Storage Pouch has six pockets with Velcro (fabric hook-and-loop fasteners) latches to keep all of your computerized polygraph accessories protected and organized when you travel.
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  • Bits Kit for Quick Connect/Disconnect Attachments - Model AA87150
    Model 76748O
    This kit provides 20 spare rubber o-rings for connectors located on the back of Data Acquisition System Interfaces. O-rings eliminate air leakage from computerized polygraphs by maintaining a tight connection.
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  • Beaded Chain Extender for Chest Assemblies - Model AA87154
    Model 76513BC
    The nickel-plated brass Beaded Chain Extender for Chest Assemblies measuring 114.3 cm in length comes in handy when testing big-size individuals (i.e. obese). This flexible chain is used with all models of pneumatic chest assemblies.
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Polygraph Software

  • Polyscore Polygraph Software - Model AA87164
    Model POLYSCORE
    Polyscore is developed by the Applied Physics Laboratory at Johns Hopkins University, USA. The latest version of Polyscore is Windows-based for ease of use. It allows polygraph examiners the ability to view and print stacked charts.
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  • ASIT Computer Scoring Software - Model AA87167
    Model LXSOFTWARE
    Windows-based since 1994, the LX Computerized Polygraph Software offeres unparalleled ease of use and proven reliability, and is Windows 7 and Windows Vista compatible. The world's leading polygraph experts agree that the LXSoftware is the most advanced and sophisticated software on the global polygraph market.
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  • QuESt Polygraph Software - Model AA87165
    Model LXQUEST
    Quantitative Evaluation System (QuESt) allows the examiner to analyze charts without the computer making an interpretation of truth or deception. QuESt graphically displays relative reaction strengths with color-coded bar graph or hodograph. It will analyze any question format, and offers selectable analysis times.
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  • Identifi Polygraph Software - Model AA87166
    Model LXIDENTIFI
    Identifi scores charts utilizing a three-position or seven-position scale. An examiner may choose to analyze relevant questions against weaker adjacent or preceding comparison questions. This algorithm will score many different exam types, including screening tests such as pre-employment and security exams.
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  • ASIT Computer Scoring Software - Model AA87167
    Model LXASIT
    Lafayette Instrument Co. has worked with the Academy for Scientific Investigative Training (ASIT) to tightly integrate the ASIT computerized scoring algorithm with the LXSoftware. Using the LXSoftware, sensor line length and magnitude measurements can be easily made using the LXSoftware's chart review calipers.
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  • Objective Scoring System (OSS-3) - Model AA87168
    Model OSS-3
    The Objective Scoring System (OSS-3) is the world's most reliable polygraph scoring algorithm. OSS-3 was developed with the goal of providing a robust, widely applicable, well documented, and mathematically sound computerized polygraph scoring model.
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Warranty Policy

Lafayette Instrument Company guarantees their Data Acquisition System (DAS) against all defects in materials and workmanship to the original purchaser for a period of three (3) years and all polygraph accessories for a period of one (1) year from the date of shipment, unless otherwise stated.

During this period, Lafayette Instrument Company will repair or replace, at its option, any equipment found to be defective in materials or workmanship. If a problem arises, please contact our office for prior authorization before returning the item.

This warranty does not extend to damaged equipment resulting from alteration, misuse, negligence or abuse, normal wear or accident. In no event shall Lafayette Instrument Company be liable for incidental or consequential damages. Warranty period for repairs or used Lafayette Instrument Company equipment purchased from ARGO-A (Kiev, Ukraine) is 90 days.

Export License

The U.S. Department of Commerce requires an export license for a polygraph with an ultimate destination other than Australia, Japan, New Zealand or any NATO Member Countries. It is against U.S. Law to ship a polygraph to any other country without an Export License. Contact ARGO-A for the required license application forms. This is a simple and standard procedure, and we will be happy to assist you in completing the forms. ARGO-A will take care of the rest.