EEG Systems

EXG and Biometric Solutions

DSI 24

Dry Electrode EEG Headset

  • 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:

    • Self-donned and ready to record EEG in under 5 minutes
    • Comfortable for wearing continuously over 8 hours
    • Portable design suitable for light ambulation in office or lab environment
    • 21 sensors positioned according to the 10-20 International System
    • Continuous impedance monitoring
    • Bluetooth wireless transmission with sampling at 300 Hz
    • Hot-swappable Li-ion batteries allow continuous operation
    • 8-bit digital trigger input
    • Adjustable to fit a wide range of head sizes (52-62 cm in circumference)


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:

  • 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-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