Full-band DC-EEG biofeedback system

NEURO PRAX® EEG systems measure physiological activity, such as EEG, EMG, and EP signals simultaneously and synchronously for all channels. The unique amplifier technology captures EEG activities from infraslow (0 - 0.3 Hz) to ultrafast (80 - 1,200 Hz) frequencies.

The full-band DC-EEG system provides a wide range of optional software-based functions, such as online correction of artifacts caused by muscle and eye movements, topographical analyses, spectral and amplitude mapping as well as online averaging. The high-level dynamic range of the amplifiers, the NEURO PRAX® EEG system can be upgraded for use during transcranial electrical stimulation (tES) with direct current (tDCS), alternating current (tACS) and random noise current (tRNS), or during transcranial magnetic stimulation (TMS). In addition, it can also be used to take measurements during functional magnetic resonance imaging (fMRI).

The NEURO PRAX® EEG is a biofeedback device according to the FDA Regulation Number 882.5050. It supports clients to learn to self-regulate their brain activity (EEG biofeedback). It is intended to be used for EEG biofeedback with the slow cortical potentials (SCP) protocol.


  • 32-channel full-band DC-EEG biofeedback system (64, 128 channels)*
  • channel type (EEG, EMG, ECG) selectable via software
  • non referential storage of raw data
  • simple and intuitive user interface
  • EEG mountings and event markers freely selectable
  • Research participant database, including experimental protocols and timelines, with comprehensive documentation.
  • suitable for polygraphy and polysomnography
  • topographical analyses, spectral and amplitude mapping
  • *Optional

Options and System Extensions

  • module to correct EEG artifacts (blinking, eye movement, body movement)
  • module for cognitive evoked potentials: CNV, CPTOX, P300, ERN, and BP
  • NEURO PRAX® examination license from other PC
  • export module for exporting measured data into other formats
  • module for data access within MATLAB®/Simulink®, LabVIEW®, C/C++
  • module for online data access via Ethernet by TCP/IP
  • rechargeable battery pack
  • feedback module system extension (additional monitor)
  • biofeedback system extension (GSR and breathing)
  • optical trigger input module system extension
  • equipment trolley

Technical Data

  • 32 full-band DC-channels (64, 128 channels)*
  • input impedance > 10 G
  • 24-bit resolution per channel
  • selectable sampling rates of 64 to 4,096 sps
  • frequency range of 0 to 1,200 Hz @ 4,096 Hz sampling rate
  • common mode rejection rate (CMRR) > 90 dB @ 50 Hz
  • dynamic input range approx. ±175 mV
  • input noise < 0.9 μV (RMS) @ 0 - 110 Hz at 256 sps
  • max. power consumption 1.5 W
  • continuous operation time > 8 h
  • power supply via built-in rechargeable batteries
  • applied part BF
  • dimensions in mm: 290 x 130 x 200 (W x D x H)
  • weight: 4.2 kg (incl. batteries)
  • data transmission via optical fiber
  • electrode input box, incl. connector cable (32, 64, 128 channels)
  • * optional
  • powerful Intel™ Core Duo processor, min. 1 GB RAM, 160 GB hard disc, USB 2.0, ethernet interface (LAN), min. 15“ TFT color monitor, keyboard, mouse
  • operating system WINDOWS® 10 (and later)
  • operating voltage 100-240 V @ 60/50 Hz AC
  • dimensions in mm: 420 x 365 x 170 (W x D x H)
  • weight: 11.6 kg (incl. stand)


  • Brochure
  • Measuring and Modulating Brain Activity

Areas of Application

  • Research: recording of full-band DC-EEG/EP and polygraphic signals.
  • EEG: biofeedback research 3D EEG feedback system.

Items marked with* are investigational devices and for research use only. CAUTION - Investigational Device. Limited by Federal (or United States) law to investigational use.