LX7 Polygraph System
Model LX7-S
The LX7 is our next-generation polygraph system that boasts features designed to elevate accuracy, consistency, and usability in the field.
Enhanced PPG Sensitivity
The LX7 features improved detection of subtle, rapid changes in pulse blood volume via the photoelectric plethysmograph (PPG) sensor, delivering more reliable cardiovascular readings across a broader selection of examinees.
New ECG channel for Pulse Arrival Time (PAT) measurement
Calculates the time between the ECG pulse and PPG waveform providing a time measurement that is directly correlated to blood pressure. Supports research and further development of the PAT measurement as an eventual replacement for the cardio measurement. Research has found that PAT is as effective as the cardiograph for discriminating between truthful and deceptive people in a polygraph test.
Expansion port to support future sensor development
Newly designed sensors already in development. Coming soon!
Modernized enclosure design
Maintaining high quality reliable connectors, the LX7 employs a curved design that improves cable management and organization for a cleaner workspace. Enclosure is built with polycarbonate blend for superior toughness, durability, impact resistance and heat resistance.
LX7-S System includes
- LX7 Polygraph Data Acquisition System
- LXEdge Software
- LXSoftware Bundle with OSS-3
- Activity Sensor
- Photoelectric Plethysmograph (PPG)
- Vented Pneumo Chest Assembly, Silver
- Vented Pneumo Chest Assembly, Blue
- Repositionable/Disposable with 2 Reusable Snap EDA Electrodes
- Blood Pressure Cuff and Pump Bulb
- DAS Storage Pouch
- Targus Backpack
Features
- 10 data channels including a new ECG channel
- Next-generation pulse arrival time (PAT) sensor
- Streamlined EDA measurement with expanded GSR range results in consistent, high-precision results
- Upgraded processor delivers increased performance and efficiency
- New expansion port for future sensor development
- Curved design improves cable management and organization for a cleaner workspace
- Quick release connectors with extended connection reliability
- Maintains medical grade isolation for subject safety
- Supports usage of LX6 accessories
- Powered by well known LXEdge and LXSoftware
Specifications
- Size: 8.66” x 3.61” x 1.21” (22.0 x 9.2 x 3.1 cm)
- Power: USB connection
- Isolation: 5000Vrms isolation on all channels
- Enclosure material: ABS/Polycarbonate blend
- Data Transfer Rate: 180 samples/second across all channels
- Resolution: 32-bit analog to digital conversion
- Meets ASTM standards
- Enclosure UL 94V-0 rated
- CE certified/meets EMC directive
- Supports LXEdge/LXSoftware
Sensor Channels
| Input | Channels | Specifications |
| Cardio | 1 | 0 to 140 mmHg |
| Pneumo | 2 | Extended pressure range |
| EDA | 1 | GSR: 3.59 μA constant current, range of 10 kΩ to 4.0 MΩ Isolation: additional 2000Vrms |
| PPG | 1 | PPG finger clip: 0.47 second time constant, 940 nm |
| Activity | 4 | 0 to 4 V Analog Input |
| ECG | 1 | Isolation: additional 2000Vrms |
