EEG Systems

EXG and Biometric Solutions


Dry Electrode EEG Headset

  • 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)


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

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