EEG Systems
EXG and Biometric Solutions
DSI 24
Dry Electrode EEG Headset
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The DSI-24 is a research-grade wireless dry electrode EEG headset designed for rapid application of 21 sensors at locations corresponding to the 10-20 International System. Its main features include:
- ㆍSelf-donned and ready to record EEG in under 5 minutes
- ㆍComfortable for wearing continuously over 8 hours
- ㆍPortable design suitable for light ambulation in office or lab environment
- ㆍ21 sensors positioned according to the 10-20 International System
- ㆍContinuous impedance monitoring
- ㆍBluetooth wireless transmission with sampling at 300 Hz
- ㆍHot-swappable Li-ion batteries allow continuous operation
- ㆍ8-bit digital trigger input
- ㆍAdjustable to fit a wide range of head sizes (52-62 cm in circumference)
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Applications
The DSI-24’s practicality, portability, and high signal quality opens the door to taking numerous applications that were previously limited to lab environments to more naturalistic settings. 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-24’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-24: The DSI-24-C, which is designed to comfortably and accurately position the dry sensors on heads 48-54 cms in circumference, thus fitting >90% of male children 3-7 years of age, and >90% of females 4-9 years old. (The DSI-24 optimally fits 54-62 cm)
This unit is thus an excellent complement to a DSI-24, or can be purchased separately, as the child-sized version is a stand-alone unit, and includes its own integrated amplifiers, digitizers, and 19 sensors on the head at the International 10/20 System locations, as well as 2 removable ear clips and 1 auxiliary input for ECG/EMG/EOG.
| Sensor Locations | 21 sensors at 10-20 locations: Fp1, Fp2, Fz, F3, F4, F7, F8, Cz, C3, C4, T7/T3, T8/T4, Pz, P3, P4, P7/T5, P8/T6, O1, O2, A1, A2 |
| Common-Mode-Follower | Pz is default reference (can be changed to LE in software) |
| Ground | Fpz |
| Amplifier/Digitizer | 16 bits, 24 channels |
| Analog/Digital Resolution | 0.317 uV referred to input |
| Analog/Digital Converter | 16 bits |
| Sample | 300 Hz (600 Hz option) |
| 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 | 8-bit input |
| Run-time | Continuous (hot-swappable batteries) |
| Wireless | Bluetooth |
| Wireless Range | 10 m |
| Headset weight | ~600 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 |