Electrical Potential of Acupuncture Points: Use of a Noncontact Scanning Kelvin Probe

Figure 1

Illustration of the Scanning Kelvin Probe arrangement. The Kelvin Probe tip is maintained over the skin at a distance of 𝑑₀ to create a capacitor arrangement. Due to the intrinsic potential differences between the tip and the skin (𝑉_𝑆), charges accumulate at the tip once a closed circuit is established. The tip oscillates at an amplitude of 𝑑₁ which generates a current through the Scanning Kelvin Probe circuit.