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The NeXus-4 is a small and high-end biofeedback and neurofeedback system which is totally suitable for professional grade physiological monitoring, and clinical applications.

Starter system for biofeedback and neurofeedback

Our most affordable 4 channel system can be used for all kinds of biofeedback and neurofeedback applications by measuring a wide variety of signals such as brainwaves (EEG), muscle tension, heart rate, relative blood flow, skin conductance, respiration, temperature, and many more. The NeXus-4 is so small it fits in your pocket and it communicates wirelessly with your computer using bluetooth technology. Thanks to its portability the NeXus-4 provides the user with a great deal of freedom in movement during a session. Its built-in flash memory of 64 MB can store more than 8 hours of physiological ambulant data.

Versatile and flexible solution

The NeXus-4 comes with the easy to use and highy customizable BioTrace+ software, with free lifetime updates. BioTrace+ is a complete software package for physiological monitoring and a wide range of biofeedback and neurofeedback applications. Create reports with statistics or just export the data and use it for further analysis. The NeXus-4 also includes 4 batteries, Bluetooth dongle, leather system case, and manuals.

Take a look at our solutions and our physiological sensors to explore the full possibilities of the NeXus-4.

High quality and reliable signal recording

With the high medical grade connectors that lock-in, there is neither noise nor artifact when touching or pulling them. Artifacts through movement of cables or other external sources of noise are reduced to a minimum, because of cutting edge active noise cancellation technology and carbon coated cables. Prevention is better than cure; the goal is to prevent artifacts, not to delete them afterwards and thereby deleting valuable data as well. NeXus systems are built with high quality electronics. It is easy to get good and very reliable signals with less preparation time. No cables going to your computer, providing a high freedom of movement.


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The NeXus-4 for biofeedback, neurofeedback, and physiological monitoring has the following features:



Mind Media offers solutions for almost every biofeedback and neurofeedback applications and for physiological monitoring. Off course every solution can be adjusted to create a perfect fit for every application. The following solutions are offered for the NeXus-4:

  Total set   Biofeedback set   Neurofeedback set
Software BioTrace+   BioTrace+   BioTrace+
Sensors EXG* & Ground   EXG* & Ground   EXG* & Ground
  Respiration   Respiration    
  Skin Conductance   Skin Conductance    
  Temperature   Temperature    
  BVP   BVP    
Electrodes EXG Meditrace   EXG Meditrace   EEG Discs
  EEG Discs        
Accessories Minicap       Minicap
  Earclips       Earclips
  Preparation Gel       Preparation Gel
  Conducting Gel       Conducting Gel
  Cleaning       Cleaning

*The EXG sensor delivers 2 signals of EEG, sEMG, ECG, or EOG.

Possible add-ons:

  • BVP Head Sensor for migraine training
  • EMG Pelvic Floor Sensor (Vaginal and/or Rectal) for incontinence training


The technical specifications of the NeXus-4 are:

Number of channels 4
Size (approx.) 112 X 66 x 28 mm
Weight (approx.) 138 grams
Display -
ADC output/resolution 24 bits
Safety class Medical CE Certified (IIa) / FDA Registered (II)
Warranty 2 years
EXG channels  
Number of channels 2
- EMG Up to 2
- EEG Up to 2
- EOG Up to 2
- ECG Up to 2
- SCP -
Input signal range -100mV / + 100mV
Input common mode range -2.0 Volt ..... +2.0 Volt
Sample rate 1024 Hz (samples/sec)
Gain factor 19,5
Noise <1 uV RMS (@256 SPS, EEG 1-45 Hz)
Input impedance > 10^12 Ohm
CMRR (typical) > 100 dB
Accuracy +- 2%
Connector Lemo OB series 6 pin (2 channels)
AUX channels  
Number of channels 2
- Skin conductance Up to 2
- Temperature Up to 2
- BVP/ HR Up to 2
- Respiration Up to 2
- HEG 2 inputs required
- Force Up to 2
- Accelerometry (3D) -
Input signal range -2.0 Volt ..... +2.0 Volt
Input common mode range -2.0 Volt ..... +2.0 Volt
Sample rate 128 Hz (samples/sec)
Gain factor 1x
Noise <3 uV RMS (1-64 Hz freq. Range)
Input impedance > 10^10 Ohm
CMRR (typical) 70 dB
Accuracy +- 2%
Connector Lemo OB series 5 pin
Other channels  
Oximetry -
Unipolar EEG -
Digital -
Trigger/ synchronization -
Bluetooth Connection up to 10 meters
Flash memory Internal 64 MB
Power source 2x AA batteries
Battery life 8+ hours
External power source -