ActiveThree: 128-channel, DC amplifier, 24-bit resolution, biopotential measurement system with Active Electrodes
The ActiveThree system sets new standards for multi channel, high resolution biopotential measurement systems for research applications. The system is a further development of our successful ActiveTwo system, the first commercially available system with active electrodes. Advances in technology have allowed us to significantly increase the number of channels, digital resolution, input range, and sample rate, without any increase in size, power-consumption or costs. Second generation active electrodes are smaller in size with less cable weight, while offering even better specs in terms of low-frequency noise and input impedance. The new system confirms the solid lead that BioSemi has build over competing designs during the last years.
Headcap system with the fastest application time. Up to 128+8 electrode + 6 sensor channels in a single ultra compact box.
Reliable measurements without skin preparation. Third generation active electrode: integrated HF filter, reduced power consumption.
Battery powered front-end with fiber optic data transfer. Flexible colored electrode labeling system.
Suitable for EEG, ECG as well as EMG measurements. 24 bit ADC per channel, SAR ADC conversion!!
Graphical programming (LabVIEW) on PC and Linux. Improved digital resolution, LSB value is 31.25nV.
Full range of auxiliary sensors available. Full DC operation, large input range (400mVpp).
    Sample-rate 16 kHz/channel, optional downsampling in software.
Active Electrodes & Headcaps
USB2 Receiver
AcriveThree Advertiorial
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ERP measurement example
CNV measurement example
ABR measurement example

  Discontinued BioSemi systems:
ActiveTwo First commercially available active electrodes system with 24 bit resolution, model 2001/2023.
ActiveOne First commercially available system with active electrodes, 16 bit resolution, model 2000/2001.
Mark-8 Mains/battery powered System for passive electrodes, model 1998/1999.
Mark-6 Battery powered System for passive electrodes, model 1996/1997.

Note: For research applications only. Not a medical device as defined in EU directive 93/42/EEC. Not designed or intended to be used for diagnosis or treatment of disease.