DSI 7

wearable sensing

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DSI 7
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 minute
  • 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 ear clip 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)

Child-Sized Version: DSI-7-C

The DSI-7’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-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.

Applications:

The DSI-7’s practicality, portability, and high signal quality open 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

Specification:

  • 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 the 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

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