DSI 7 Flex

wearable sensing

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DSI 7 Flex
Dry Electrode EEG Headset

The DSI-7-Flex is a research-grade wireless dry electrode EEG system designed for the versatile application of up to 7 sensors at any location. The DSI-7-Flex offers flexibility, portability, and high signal quality, opening the door to numerous applications that benefit from fast, user-friendly EEG recording.

Features and Benefits:

  • Integrated electronics module with amplifiers, digitizers, transmitter and power supply
  • Can be configured to record EEG from up to 7 sensors + Linked Ears ear clip sensors (not shown in picture)
  • Versatile sensor placement for exploratory investigations
  • Double spring-loaded pods for mechanical stability and comfort
  • Continuous impedance monitoring
  • Bluetooth wireless transmission with sampling at 300 Hz
  • Rechargeable Li-ion batteries allow continuous operation
  • 4-bit digital trigger input
  • Can be used with BraiNet or other harness systems
  • Various optional electrode tip configurations: pinned, flat, single or double spring-loaded pods.


The DSI-7-Flex is a turnkey system whose user-configurable sensor locations allow exploration of applications requiring high signal quality dry electrodes. While this system is not intended for ambulatory use, it is designed to enable laboratory research into EEG applications that include:

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


  • Sensor Locations: 7 sensors; Can be placed at flexible locations
  • Common-Mode-Follower: 1 Common-mode follower reference sensor
  • Ground: 1 Ground Electrode
  • Amplifier/Digitizer: 1 7-channel wireless amplifier and digitizer
  • Analog/Digital Resolution: 0.317 uV referred to input
  • 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: ~200 g
  • Headsize Fit: 52-62 cm circumference
  • Headset: Can be used with BraiNet or other harness systems

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