• Overview
  • EEG: DSI 10/20
  • ECG: PSM
  • Wireless DAQ
  • QStreamer
  • QStates
  • EEG:DSI 10/20

    The Dry Sensor Interface (DSI) 10/20 is the first wireless headset designed to position 21 dry EEG sensors according to the 10/20 International System.
    The features that make the DSI 10/20 a paradigm-shifting device include:

    • Dry-Sensors:
      • Sensors require no gels or fluids, and do not leave messy residue

      Rapid Donning

      • No-prep:
        • High impedance electronics allow high fidelity EEG signals without skin abrasion or preparation
      • Through-Hair:
        • Flat-ended finger electrodes contact scalp through-hair
      • 10/20 Locations:
        • Headset automatically positions 21 sensors according to the 10/20 International System
      • Rapid Set-up:
        • Easy-to-use headset is typically self-donned in less than 5 minutes
      • Rapid Removal:
        • Easy-to-use headset is instantly taken off, and does not necessitate washing head afterwards

      Excellent Signal Quality


      • Low Noise:
        • Patented shielding and circuit design reduce environmental noise
      • Motion Artifact Resistant:
        • Proprietary artifact reduction technologies reduce motion artifacts and enable ambulatory use in office or laboratory environments.
      • Wireless:
        • Integrated amplifiers, digitizers, and transmitters allow data to be transmitted in wired or wireless modes or stored in on micro-SD cards
      • Low-Power:
        • Low-power electronics extend the battery life, and enable 24 hours of recording

      Long-Term Comfort

      • Comfortable:
        • Mechanical design carefully controls contact pressure allowing comfortable wear all day

          • Comfort survey results for subjects wearing QUASAR’s EEG headset or helmet for up to 8 hours indicated that subjects do not mind the headset.
          • Y-axis is the average of a subjectve scale where 1 was considered “unnoticeable” and 5 “comfortable but noticeable”, and 10 “untolerable”. (#) is the number of subjects in each time bin.

      Research Quality System

      • Safe:
        • The DSI 10/20 is a research prototype designed to meet ANSI safety standards, and has been designated a non-significant risk device for use in human research by several IRBs
      • Reusable:
        • The system can be cleaned by users, and sensor tips are reusable and replaceable
      • Expandable:
        • DSI 10/20 can synchronously record EMG signals from QUASAR’s dry EMG sensors, and it operates seamlessly with QUASAR’s Physiological Status Monitor (PSM) belt.
      • 10/20 Locations:
        • DSI 10/20 positions its sensors according to the International 10/20 System, with 21 sensors located at: Fp1, Fp2, Fz, F3, F4, F7, F8, Cz, C3, C4, Pz, P3, P4, T3, T4, T5, T6, O1, O2, Mastoid L (M1), and Mastoid R (M2). The Ground is at Fpz.

      DSI 10/20 Specifications

      Sensors up to 23 at 10/20 International System locations
      Headsize fit 55-60cm circumference
      Headset weight 500g
      Run-time: 24hrs continuous
      Internal data storage: 70hrs
      Wireless range: 10m
      Number of digitized inputs: 12 selectable differential channels
      Analog/Digital Converter: 16 bits
      Analog/Digital resolution: 0.317 uV referred to input
      Sample Rate: 240 or 960 Hz
      Bandwidth: 0.02-120Hz
      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

    These prototype systems are available for sale and lease.

    Download an electronic brochure (PDF 3MB), and please contact us for pricing.