manufacturers of active dry systems, such as Cognionics or g.tec SAHARA, do claim their systems are as good as wet.

have used systems from companies such as Mitsar, Cognionics, FieldTrip and EGI and they all have a figure which easily demonstrates impedance before you start measuring as shown in the figure below.

Cognionics dry flex combs DO use snap connectors. I'm not sure if they exactly mate with the ECG snaps. You might inquire at Cognionics.

As an extension, are THESE electrodes compatible with the mentioned snap cables? [Cognionics flex dry electrodes]

It is definitely possible to collect basic ERPs w/ an OpenBCI and dry electrodes. We have done it in our lab. We have done is w/ OpenBCI, Emotiv, G.Tec. Enobio, Quasar, ABM, Cognionics..... just don't

All of the Ag-AgCl electrodes listed are hard plastic (not like the flexible Cognionics), that is first plated with a thin layer of sliver, then chlorided, producing a surface layer of silver chloride

2. Cognionics comb-like sensors

If you contact Cognionics you will find they are very expensive.

http://www.cognionics.com/index.php/products/sensors/flex

To make the graphene 3D printed combs, here's some guesses about what properties might improve the feel. Well, actually not a guess since the Cognionics combs use similar features:

Nice to see that OpenBCI compares decently with Cognionics dry headset. Do you have an idea of the cost of the Cognionics gear?

The active cap is from Cognionics.

Have you tried a simple experiment of seeing the FFT alpha peak at O2 or Pz with your eyes closed? Both with the Cognionics software and with your Matlab routine, based on Cognionics instructions?

Suggest emailing Cognionics directly, as this is their device. They are clearly not sending the raw ADS1299 values, but their derivation.

Interestingly, LSL does have an App for the device (it's a Cognionics device).

The Cognionics papers are here,

I've seen papers comparing different electrode metal types, for example Ag-AgCl, gold, tin, silver, sintered Ag-AgCl, etc. And other papers comparing active (built in amp inside electrode) vs. passive

re: combs "limiting its ability to detect EEG". No, good conductivity is all that is required. Another geometry used by Cognionics is a comb with flexible tines that bend and splay outward a

The electrodes are polyurethane (PU) pin electrodes coated with titanium nitride (TiN). Explained in this paper and previous thread post. Given the length of time it has taken them to bring this to ma

http://www.cognionics.com/index.php/products/sensors/flex