CS22SS is a reusable electrode with a diameter of 22 mm of lowcorrosion stainless steel, designed to conduct transcranial electrical stimulation. The CS22SS electrode, compared to CS22, is much less prone to degradation (corrosion) when used in direct current (tDCS - transcranial dirrect current stimulation), alternating current with a constant component (monopolar tACS) and micropolarization modes, but does not provide high-quality EEG recording.
When using electrodes in the stimulation mode, the maximum allowable current density values recommended by the scientific or clinical community, which depend on the size and shape of the current, should be taken into account. Examples of calculating the current density for CS22 and CS22SS electrodes for a number of stimulation current values are given in the table.
| Stimulation current | Current density |
|---|---|
| 4 mA | 1.05 mA/cm2 (10.5 A/m2) |
| 3 mA | 0.79 mA/cm2 (7.9 A/m2) |
| 2 mA | 0.53 mA/cm2 (5.3 A/m2) |
| 1 mA | 0.26 mA/cm2 (2.6 A/m2) |
| 500 μA | 0.13 mA/cm2 (1.3 A/m2) |
The electrode is an electrically conductive disk with a hole in the center, surrounded by a molded case with an elastic skirt ring, providing a comfortable fit to the skin and an increased contact area.
The CS22 electrodes are designed for installation in MCScap 10-20 and MCScap 10-10 textile caps. The electrodes are fixed on the inside of the cap, and the wires are released through the ventilation holes.
The electrode has TouchProof 1.5 mm (DIN 42 802‑ST) connector, which fits most EEG amplifiers.
| Material of electrode conductive surface | Low Corrosion Stainless Steel AISI 316 |
| Electrode body material | polyurethane |
| Square of electrode conductive surface | 176 mm2 |
| Internal diameter of the electrode at the point of contact of the electrode contact substance with the skin | 22 mm |
| Surface area of contact of the electrode substance with the skin | 380 mm2 |
| Outer diameter of the electrode at the point of contact with the skin | 26 mm |
| Distance from the skin to the electrode conductive surface | 2.5 mm |
| The diameter of the hole in the electrode to add gel | 2.8 mm |
| Maximum allowed current through the electrode in the stimulation mode | 10 mA |
| Maximum operating voltage | 100 V |
| Electrode polarization | ≤ 50 mV |
| Resistance of electrodes insulation | ≥ 1000 MΩ |
| Dielectric strength of electrodes insulation | 1500 V |
| The impedance of the electrode | ≤ 5 kΩ |
| Electrode cable length | 120 cm |
| Connector type | Touch Proof 1.5 mm (DIN 42 802-ST) |
| Weight | 8 g |
- MCScap-CS22SS electrode
