MCScap‑CS22 electrode
MCScap‑CS22 electrode
MCScap‑CS22 is a reusable electrode with a diameter of 22 mm of sintered Ag/AgCl, designed for carrying out transcranial electrical stimulation (TES), mainly by alternating current (tACS - transcranial alternating current stimulation), and recording the electroencephalogram (EEG).
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 MCScap‑CS22 and MCScap‑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.
MCScap‑CS22 electrodes are designed for installation in MCScap® textile caps. The electrodes are fixed on the inside of the cap, and the wires are released through the ventilation holes.
The electrode has a universal connector TouchProof 1.5 mm, which fits most EEG amplifiers.
| Material of electrode conductive surface | Ag/AgCl sintered |
| 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 |
| Own noise of an electrode in the mode of registration of EEG in a range 0,5...30 Hz | less then 2 µV |
| Electrode polarization in EEG recording mode | ≤ 10 mV |
| 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 | 1.2 m |
| Connector type | TouchProof 1.5 mm (DIN 42 802‑ST) |
| Net weight | < 8 g |
- MCScap‑CS22 electrode,
- Sponges D22 - 2 pcs.
