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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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  • Computerized Polygraph LX5000-SW - Model AA87101
    Model LX6-S
    The Computerized Polygraph LX6-S is the next generation 10-channel polygraph system. The LX6-S is the world's most advanced polygraph (lie detector) 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 are interpreted by a polygraph examiner.
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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-S 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 76604-6
    Model 76604-6
    The Photoelectric Plethysmograph for the LX6-S polygraph 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 76604-6
    Model 76604ADP
    The PLE/PPG Adaptor, model 76604ADP, is required when using the Photoelectric Plethysmograph for LX5000-S, model 76604A-5L, with an LX4000/LX4000A polygraph system.
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  • Masseter Headphone System
    Model 76879HM
    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 76506-6
    This is a high quality sphygmomanometer assembly for the LX6-S computerized polygraph, which for the purpose of convenient or comfortable measuring 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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  • 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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  • Pneumo Assembly
    Model 76513-6T
    Only the finest quality materials are used for this Pneumo, which 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. A 114.3 cm Pneumo Beaded Chain Extender, model 76513BC, may also be purchased. Used with the LX6-S polygraph.
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  • Pneumo Assembly
    Model 76513-6B
    Only the finest quality materials are used for this Pneumo, which 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. A 114.3 cm Pneumo Beaded Chain Extender, model 76513BC, may also be purchased. Used with the LX6-S polygraph.
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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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  • 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 76530-6
    This blood pressure cuff eliminates problems associated with a loosely wrapped cuff and ensures that the cuff does not shift away from the brachial artery during application. In addition, the center of the bladder is clearly marked on the inner and outer surface of the cuff for correct application on either right or left limb.
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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
    Model 76535-6
    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 LX6-S.
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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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  • USB Webcam with Focus and Microphone - Model AA87131
    Model LX-WEBCAM
    LX Operating Software allows a polygraph examiner to record a polygraph session on a computer screen using an inexpensive digital camera. 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
    This is a high-quality, high-resolution Electronic Signature pad and integrated fingerprint sensor. Captures and recognizes signature and fingerprint imaging. Records fingerprints of examiners and subjects for identification purposes.
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  • Disposable Solid Gel EDA Electrodes
    Model 76642R
    The 76642R consists of a package of 50 Ag/AgCl EDA disposable snap electrodes for measuring skin conductance of subjects undergoing polygraph examination. The electrodes are pre-gelled, hypoallergenic, and latex free.
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  • EDA Cable and Electrodes
    Model 76640-6
    Designed for the LX6, this EDA Assembly has been designed for maximum efficiency and serviceability. It includes the following components: one (1) EDA cable plus two (2) reusable snap electrodes, and 50 disposable electrodes.
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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 consists of the following components: EDA Cable, model 76643A-5L, Disposable EDA Electrodes (50 ea), 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 50 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 50 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 chair's 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.
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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
    This lightweight durable case has many compartments and will easily store the complete computer polygraph system along with all accessories. This case has reinforced corners and padded walls to protect your instrumentation during travel.
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  • Storage Backpack
    Model LX-1050BP
    Standard with the LX6, this Lafayette-branded backpack fits laptops with up to 17-inch screens and includes a spacious file compartment, small zip pocket for keys or other quick access items, two water-bottle pockets, and accessory compartments.
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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 26 cm long and 0.45 kg in weight, including the battery, this printer 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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  • 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.