EEG Systems
EXG and Biometric Solutions
DSI 7
Dry Electrode EEG Headset
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The DSI-7 is a research-grade wireless dry electrode EEG headset designed for ultra-rapid application of 7 sensors at locations corresponding to the 10-20 International System. Its main features include:
- ㆍSelf-donned and ready to record EEG in under 1 minutes
- ㆍComfortable for wearing continuously over 8 hours
- ㆍPortable design suitable for light ambulation in office or lab environment
- ㆍ7 sensors positioned at the F3, F4, C3, C4, Pz, P3, P4 locations of the 10-20
International System - ㆍLinked-Ears earclip mounted active sensors
- ㆍContinuous impedance monitoring
- ㆍBluetooth wireless transmission with sampling at 300 Hz
- ㆍRechargeable Li-ion batteries allow continuous operation
- ㆍ4-bit digital trigger input
- ㆍAdjustable to fit a wide range of head sizes
- ㆍCustomizable sensor locations (contact us for custom requests)
- * The DSI-7 replaces the DSI-6 prototype system (most information about DSI-6
and tutorial videos are applicable to DSI-7)
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Applications
The DSI-7’s practicality, portability, and high signal quality opens the door to taking numerous applications that require rapid and non-intrusive EEG recording. Such applications include:
- ㆍNeurofeedback
- ㆍNeuroergonomics
- ㆍNeuroeconomics / Neuromarketing
- ㆍAugmented Cognition
- ㆍBrain-Computer Interfaces
- ㆍBiometrics
- ㆍCognitive Stress or Workload Monitoring
- ㆍPsychological Research
- ㆍSports Peak Performance Training
Child-Sized Version: DSI-24-C
The DSI-7’s practicality, robustness to motion artifacts, high signal quality, and unsurpassed comfort beckoned for a version suitable for children.
And, thus, by popular demand, we have developed a smaller version of our DSI-7: The DSI-7-C, which is designed to comfortably and accurately position the dry sensors on heads 48-54 cm in circumference, thus fitting >90% of male children 3-7 years of age, and >90% of females 4-9 years old. (The DSI-7 optimally fits 54-62cm)
This unit is thus an excellent complement to a DSI-7, or can be purchased separately, as the child-sized version is a stand-alone unit, and includes its own integrated amplifiers, digitizers, and 7 sensors on the head at the International 10/20 System locations, as well as 2 ear clips.
| Sensor Locations | 7 sensors at 10/20 locations (default): F3, F4, C3, C4, Pz, P3, P4 + Linked Ears - See customization options |
| Common-Mode-Follower | Pz is default reference (can be changed to LE in software) |
| Ground | 1 ground electrode |
| Amplifier/Digitizer | 16 bits, 7 channels |
| Analog/Digital Resolution | 10 m |
| Analog/Digital Converter | 16 bits |
| Sample | 300 Hz |
| Bandwidth | 0.003-150 Hz |
| Gain | 60 |
| Common Mode Rejection Ratio | >120 dB |
| Channel Cross-Talk | < -70 dB with sensors |
| Input Impedance (1Hz) | 47 Gohm |
| Input Bias Current | <25 pA |
| DC Offset Tolerance | +/-200 mV |
| Maximum Input Range | 10mV pk-pk |
| Noise (1-50Hz) | <3 uV peak-peak |
| Digital Inputs | 4-bit input |
| Run-time | >3 12 Hours |
| Wireless | Bluetooth |
| Wireless Range | 10 m |
| Headset weight | ~350 g |
| Headsize Fit | 52-62 cm circumference |
| Headset | Fixed sensors on spring-loaded arms and pods for sensor support |
| Notice | * Specifications subject to change, please contact us to obtain latest specifications |