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Figure 1
Electrical model of skin
Figure 2
Conductance G and Susceptance B (150 mV rms) as a function of frequency for two palmar Kandall KittyCat® electrodes. The measurements are done for two different levels of sweat activity. Average and standard deviation of 20 measurements for each of the two levels.
Figure 3
Simultaneous measurement of AC conductance and susceptance (20 Hz, 500 mV peak amplitude) and DC conductance (500 mV) on the right palmar skin site during excitation (combing through the test subject’s hair). These measurements are done in parallel to the measurements shown in figure 2. It shows the test subject’s EDA during the whole session (20 frequency scans).
Figure 4
Simultaneous measurement of AC conductance and susceptance (20 Hz, 500 mV peak amplitude) and DC conductance (500 mV) on the right palmar skin site during relaxation. These measurements are done in parallel to the measurements shown in figure 2. It shows the test subject’s EDA during the whole session (20 frequency scans).
Figure 5
The three-electrode electrical admittance measuring system, showing measuring (M), reference (R) and current carrying (C) electrodes on the skin (left) and with skin impedance and DC potential (right).
Figure 6
Examples of simultaneously measured skin potential and conductance. From [3] with permission. Top: Highly correlated potential and conductance curves. Bottom: Example of biphasic potential curves.