Pin-Type Active-electrodes The BioSemi "Pin-type" Active electrode has been designed especially for mounting in BioSemi headcap's. The electrode has a sintered Ag-AgCl electrode tip, providing very low noise, low offset voltages and very stable DC performance. Standard sets have 32 electrodes on a common connector with 140 Centimeter cable length. (Other cable lengths are available on request.) The electrode is completely resistant to long term water and alcohol submergence enabling easy cleaning and disinfecting. The electrodes are numbered with water-proof stickers for easy channel recognition.   Do you need help with finding the correct electrodeset ordercode ? Click here.

Do you need help with finding the correct electrodeset ordercode ? Click here.

128 channel Active-headcap   The BioSemi headcap is a novel concept for high density EEG measurements. The plain cap only exists of the electrode holders. No electrodes or wires are attached to the cap. This allows for very fast placement of the electrodes according to the procedure described below. Preparation times as low as 30 minutes for a 128 channel EEG headcap are realistic. Because of the Active electrode principle, high electrode impedances do not influence the signal quality. Therefore, any skin preparation can be completely omitted. The location of the electrodes can be easily determined by the user, more info can be found in the "Make Cap Question"

Step 1   Step 2   Step 3     Place headcap over the head.   Apply electrode gel in holes. No further scrubbing of the skin necessary !   Click Active electrodes into holders. (electrodes & holders are color labeled)

The following links provide more information about the history and development of the BioSemi Active-electrodes:   Development of active high-density cap. Background of the pinned electrode designs for use with caps.   Active electrode development history. Read this abstract for more information on earlier designs that lead to our current active electrodes.