EDA Sensor Electrode Gel

Connection, ECG, EMG, EDA, etc.
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Joined: Fri Nov 03, 2017 12:26 pm

EDA Sensor Electrode Gel

Postby Velu » Wed Dec 13, 2017 3:37 pm

Dear Team,

I have read in the document "Publication recommendation for the EDA" ( http://download.xuebalib.com/xuebalib.com.7601.pdf ) that,

For EDA recording, electrode gel or paste must contain a chloride salt, with NaCl being most often used. Concentrations in the range of 0.050–0.075 molar (0.3%–0.4% by weight) are preferred, because they approximate the concentration of NaCl in sweat that reaches the surface.

In ECG recording, the salt may have a concentration of 3% by weight (0.5 M), not far from seawater that is well tolerated by our skin for many hours.

Such salt concentrations are far too high for EDA recordings; therefore, pre-gelled commercially available ECG electrodes are not suitable for EDA recording. The same holds for gels sold for EEG recording.

But, do the pre-gelled electrodes delivered (Covidien Kendall H124SG) obey this? And what could be the implications (if in case, you have done some studies on this before)?


Site Admin
Posts: 567
Joined: Tue Aug 27, 2013 3:47 pm

Re: EDA Sensor Electrode Gel

Postby BITalino » Thu Dec 14, 2017 4:33 pm

Hi Velu,

You can find the manufacturer specifications of the Covidien electrodes here:

Best regards,
The BITalino Team

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