DSI-4

DSI-4

wearable sensing

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DSI-4

The DSI-4 is a complete, research-grade wireless dry electrode EEG system designed for rapid application of 4 dry electrode EEG sensors on the forehead. This unique fully integrated wireless EEG system is embedded in a comfortable adult-sized, headband designed for use during sleep.

  • 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
  • 4 sensors positioned at the F7, F8, Fp1, Fp2 locations of the 10-20 International System
  • Continuous impedance monitoring
  • Bluetooth wireless transmission with sampling at 300 or 600 Hz
  • 4-bit digital trigger input
  • Adjustable to fit a wide range of head sizes.

Applications:

The DSI-4’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:

  • Neuroscience Research
  • Sleep Research
  • Meditation Training
  • Neurofeedback
  • Brain-computer interfaces
  • Neuromarketing

Specifications:

  • Sensor Locations: 4 sensors at 10/20 locations: F7, F8, Fp1, Fp2
  • Common-Mode-Follower: Fz is the default reference (can be changed to LE in software)
  • Ground: Fpz
  • Amplifier/Digitizer: 16 bits, 4 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): < 1 uV RMS
  • Digital Inputs: 4-bits
  • Run-time: >12 hours
  • Wireless: Bluetooth
  • Wireless Range: 10 m
  • Headset weight: 102 g
  • Headsize Fit: 52-62 cm circumference
  • Headset: Fixed sensors on spring-loaded arms and pods for sensor support

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