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  5. Model DSI 7 - Dry Electrode EEG Headset

Model 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: Self-donned and ready to record EEG in under 1 minutes, Comfortable for wearing continuously over 8 hours, Portable design suitable for light ambulation in office or lab environment, 7 sensors positioned at the F3, F4, C3, C4, Pz, P3, P4 locations of the 10-20 International System, Linked-Ears earclip mounted active sensors, Continuous impedance monitoring, Bluetooth wireless transmission with sampling at 300 Hz, Rechargeable Li-ion batteries allow continuous operation, 4-bit digital trigger input, Adjustable to fit a wide range of head sizes, Customizable 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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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:
  • Neurofeedback
  • Neuroergonomics
  • Neuroeconomics / Neuromarketing
  • Augmented cognition
  • Brain-computer interfaces
  • Biometrics
  • Cognitive stress or workload monitoring
  • Psychological Research
  • Sports Peak-Performance training

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 >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