The DSI-24 is a research grade wireless 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 300Hz
  • Hot-swappable Li-ion batteries allow continuous operation
  • 8-bit digital trigger input
  • Adjustable to fit a wide range of headsizes (54-62cm 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
  • NeuroEconomomics / 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 54-62cm)

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 earclips and 1 auxiliary input for ECG/EMG/EOG.

So please ask us about our special bundle pricing.



Features and Specifications


Features and Specifications


Sensor Locations Twenty (20) sensors at International 10/20 System locations:
Fp1, Fp2, Fz, F3, F4, F7, F8, Cz, C3, C4, T3, T4, T5, T6, P3, P4, O1, O2, M1 and M2


One (1) Common Mode Follower sensor at Pz
Ground One (1) ground electrode at Fpz
Headset Easy to don, comfortable, and long-term wearable headset assembly with spring-loaded arms and pods for sensor support.
Good for long-term ambulatory use in office or laboratory environment


One (1) 24-channel amplifier and digitizer
Wireless BlueTooth
Run-time Continuous (hot swappable)
Headsize fit 52-62cm circumference (54-62cm optimal)
Headset weight ~600g
Wireless range: 10m
Digital Inputs: 8 bit input
Analog/Digital Converter: 16 bits
Analog/Digital resolution: 0.317 uV referred to input
Sample Rate: 300 Hz
Bandwidth: 0.003-150Hz
Gain: 60
Common mode rejection ratio: > 120dB
Channel Cross-talk: < -70dB with sensors
Input Impedance (1Hz): 47Gohm
Input bias current: <25pA
DC offset tolerance: +/-200mV
Maximum input range: 10mV pk-pk
Noise (1-50Hz): <3 uV pk-pk

* Specifications subject to change, please contact us to obtain latest specifications



DSI-Streamer is Wearable Sensing's easy-to-use data acquisition software. The software features include:

  • Control of DSI headset functions
  • Real-time diplay and replay of data
  • Tabbed navigation of controls
  • Integrated diagnostic tab with graphical color representation of electrode impedance
  • User selectable filters
  • Record raw and/or filtered data
  • Exporting to standard EDF and comma-separated value (.csv) formats that can be readily imported to 3rd party applications
  • Editable montages, color scheme and display parameters (window size, scaling, etc.)
  • Event Related Potentials (ERP) view (in beta)
  • TCP/IP socket for real-time streaming to external applications (in beta)

* included at no additional charge with DSI systems



QStates is a quantitative EEG (qEEG) based cognitive state classification software that uses spectral features

  • Rapid and efficient Partial-Least-Squares (PLS) based learning algorithm
  • Train to classify cognitive states based on as little as two one-minute recordings (high and low states)
  • Produces linear interpolation or probability density function output of state (0-100 value) every 2 seconds
  • Models can be trained to classify any cognitive state for which there is a qEEG signature (eg. workload, emotions, ...)
  • Validated perfomance of >90% accuracy for mental workload, engagement and fatigue
  • Classifies up to 3 models simultaneously
  • Real-time processing of data streamed via TCP/IP socket
  • Off-line data analysis with graphical display of results
  • Automated summary tables generation
  • Monitor data quality and rejects bad epochs
  • Data saved in comma-separated value (.csv) format

*Sold separately

Application Programming Interface (API)

Wearable Sensing has an Application Programming Interface to allow developers to directly communicate with DSI systems via a Component Object Model (COM) interface that is implemented as a .dll library for Windows OS.


DSI-24: Donning

This video tutorial shows the process of putting on a DSI-24 and adjusting it for proper fit.

DSI: Set-Up

This video shows how to set-up Wearable Sensing's Dry Sensor Interface (DSI) systems and getting sensors through hair prior to starting the recording of data.

Doffing DSI-24

This video tutorial shows the process of removing, cleaning and maintaining a DSI-24.

Acquiring EEG with DSI-Streamer

This video tutorial shows the process of acquiring EEG signal using DSI-Streamer, and saving data to .csv and .edf format.