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Grael V2 Compumedics with Gradd/No Software

The Grael 4K is the most advanced amplifier on the market today. Compumedics’ flagship, high-definition EEG, sleep and research amplifier specified for the most demanding cognitive research or epilepsy/sleep diagnostics. Experience the new and more powerful Grael.

A single IP connection to the Grael amplifier provides both power and data transmission, making it very easy to set up the system at different locations in your department.

The Grael 4K system has CE Class IIa medical certification and FDA approval

SKU: 9028-0001-01 Categories: , , Tags: , ,



Over 25 years of experience in designing EEG and PSG amplifiers has culminated in the new Grael amplifier range – Compumedics’ most technologically advanced amplifier yet. Four new amplifiers specifically designed to fit your needs! The Grael 4K PSG:EEG Amplifier is the most advanced amplifier of them.

Key features

  • Amplifier can be used for wide range of applications including EEG, Evoked Potentials (ERP) and Sleep studies
  • Sampling Rates up to 4096 Hz
  • User selectable gain allows choice of lower noise or higher allowable DC offset (great for combining EEG with TDCS/TACS or TMS)
  • Combine multiple devices for more channels or group studies (hyperscanning)


Specifications Grael 4K PSG:EEG Amplifier

Max Number of Channels 60
EEG Channels 32
Bipolar Channels 8
Analog Inputs (HLI) 8
Extra Inputs Inductive Bands (2), Respiratory Impedance, Pressure (1 single ended, 1 differential), Body Position, Event Button, Microphone, Integrated Light Sensor, Oximeter with Pleth Waveform
Max Sampling Rate 4096 Hz
Sampling Rate (Hz) 256, 512, 1024, 2048, 4096
Bandwidth DC-1150 Hz
Resolution 24-bit
Input Range 300mV to 3000mV (4 modes)
Sensitivity 18nV
Input Impedance >100 MOhm
Common Mode Rejection (CMRR) >100 dB
Noise (peak-to-peak) <2 uV
Impedance Check Yes
Trigger 8-bit TTL
TMS Compatible Yes
tACS/tDCS Compatible Yes
Device Synchronization Includes PTP (precision time protocol) hardware to allow synchronizing multiple units for 64 (or higher) referential channels
Headcap Connector Yes
Recording Interface Ethernet
Power Power Over Ethernet (PoE)
Medical Certification CE Class IIa, FDA


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