Education  Transducers  Electrodermal
EDA FINGER TRANSDUCER, BSL - SS3LA
	$195.00

The SS3LA transducer connects to a single MP3X input channel to record electrodermal activity (skin conductance or, with proper setup *, skin resistance). Two Ag-AgCl electrodes are mounted in individual, ergonomically designed, polyurethane housings for improved contact; they attach to the fingers by a Velcro strap or can be taped to any other part of the body. The electrodes have a 6 mm diameter contact area with a 1.6 mm cavity to accommodate electrode gel. The non-polarizable electrodes are shielded to minimize noise interference and improve recordings.

BSL PRO software includes two EDA presets:

• Electrodermal Activity (EDA), 0 - 35 Hz; requires calibration—see BSL Hardware Guide (under the Help menu or online) for details
• Electrodermal Activity (EDA) Change; no calibration required

*Skin resistance setup: Use an Expression calculation channel to take the reciprocal of conductance and then apply proper scaling. See the BSL PRO Software Guide (under the Help menu or online) for setup details.

Usage Recommendations

There must be good electrical connections between the skin and the electrodes for EDA to work properly. When using GEL101 isotonic gel it is important that the gel has a chance to be absorbed and make good contact before recording begins. Accordingly:

1. Apply GEL101 to the skin at the point of electrode contact and rub it in.
2. Fill the SS3LA electrode cavity with GEL101.
3. Attach the SS3LA electrode to the subject.
4. Wait 5 minutes (minimum) before starting to record data.