Table 1.
Change in contact impedance with frequency of all electrode–conductive gel combinations
| Frequency range | Impedance change of different combinations (kΩ) | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| eA-gA | eA-gB | eA-gC | eA-gD | eA-gE | eB-gA | eB-gB | eB-gC | eB-gD | eB-gE | eC-gA | eC-gB | eC-gC | eC-gD | eC-gE | ECG | |
| 100 Hz–10 kHz | 20.45 | 19.42 | 8.24 | 24.35 | 23.80 | 19.81 | 18.84 | 10.92 | 25.95 | 23.81 | 23.07 | 19.70 | 20.52 | 21.25 | 25.90 | 19.93 |
| 10 kHz–1 MHz | 1.21 | 0.39 | 0.64 | 1.61 | 0.52 | 0.77 | 0.62 | 0.48 | 0.80 | 0.86 | 0.70 | 0.95 | 0.42 | 0.40 | 0.41 | 0.73 |
| 100 Hz–1 MHz | 21.66 | 19.81 | 8.88 | 25.96 | 24.32 | 20.58 | 19.45 | 11.39 | 26.76 | 24.67 | 23.77 | 20.65 | 20.93 | 21.65 | 26.31 | 20.66 |
ECG electrocardiogram