EDA Sensor Electrode Gel

Connection, ECG, EMG, EDA, etc.
Velu
Posts: 6
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)?

Thanks,
Velu

BITalino
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:
http://bitalino.com/datasheets/Arbo_H124SG.pdf

Best regards,
The BITalino Team


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