The OpenBCI EEG Electrode Cap engineered for reliable EEG bio-potential measurements with wet electrodes. The product comes in two variants:

• 21-channel electrode cap with Ag/AgCl coated electrodes
• Premium 21-channel electrode cap with patented, sintered Ag/AgCl electrodes

Note, electrode gel and touchproof adapter must be purchased.

Product Features: 

• Contents are: a cap with electrodes, a syringe, and a cleaning brush.
• Sleek, compact design for wet electrode EEG measurements
• Engineered to combine the best of signal quality and comfort
• Suitable for sleep studies
• Compatibility with all OpenBCI boards and standard touch-proof connectors
• Compatibility with OpenBCI’s FREE open-source software
• Compatibility with most bioamplifiers
• Electrodes located and labeled using the internationally recognized 10-20 system
• Comfortable, easy-to-clean mesh cap
• Adjustable chinstrap for stability and reduction in movement artifacts
• Insulated leads secured with built-in elastic tabs
• Built-in durable sleeve for cable management
• Comes in two Ag-AgCl electrode variants, coated and sintered
• Three size options, S,M, and L

The leads terminate in industry-standard 1.5mm Touch-Proof connectors and can be connected to the Cyton 8-channel or CytonDaisy 16-channel board with an electrode adapter. Please note: these items are not included in this kit!

Important Notes:

• Electrode gel is required and sold separately. Purchase the recommended product HERE.
• Cleaning the cap properly after use is very important and will substantially increase the longevity of the product. A brush for cleaning the cap is included!
• The premium electrode cap with sintered AgAgCl electrodes is resistant to the corrosion of wet electrodes associated with repeated use. The sintered material is conductive throughout; a layer can be scraped off in the event of corrosion, restoring the signal quality. The sintered cap is longer-lasting and more durable. This cap has gray plastic guards around the electrodes (see product images).
• It has been well-established by that sintered Ag-AgCl electrodes are superior to other types of commercially available electrodes, as compared here and here in Clinical Neurophysiology.
• After 25-50 uses, corrosion of coated Ag/AgCl electrodes may require replacement of the cap if not maintained by cleaning, due to compromised conductive layer. This cap has black rubber guards around the electrodes (see product images)
• Be sure to choose your size from the dropdown menu! See instructions below.

Size Guide: 

Be sure to get the right size for your head! Obtain the circumference using a tape measure wrapped horizontally across the widest part of your head.

• Small = 50-54cm (best for children)
• Medium = 54-58cm
• Large = 58-62cm
• If between sizes, please size up