DSI 24

wearable sensing

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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)

Child-Sized Version: DSI-24-C:

The DSI-24’s practicality, robustness to motion artefacts, 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.

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:

  • Neurofeedback
  • Neuroergonomics
  • Neuroeconomics / Neuromarketing
  • Augmented Cognition
  • Brain-Computer Interfaces
  • Biometrics
  • Cognitive Stress or Workload Monitoring
  • Psychological Research
  • Sports Peak Performance Training

Specification:

  • 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 the 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

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