Impedance Over Time with Applied Heat

Procedure: The film sensor is placed on a subject’s inner wrist, with a heating pad placed directly on top. This was done for a total of 15 minutes, taking impedance measurements every 3 minutes.

Results: As seen in the graph below, the impedance decreased with the application of heat.

Discussion: It was expected for the impedance to decrease with time as heat is applied. When heat is applied to human skin, the blood flow and capillary permeability increase, leading to a decrease in impedance.

Impedance and Phase Angle of Chicken Skin

Procedure: The impedance and phase angle were measured over the span of 150 minutes, taking measurements every 5 minutes. This was done as chicken skin was dehydrating in order to relate impedance and phase angle to moisture content.

Results: As seen in the graphs below, the impedance and phase angle both started out lower and increased.

Discussion: The impedance and phase angle increasing with time as the skin dehydrates was the expected result. As chicken skin gets dehydrated, there is less fluid present, meaning the conductivity decreases, leading to an increase in impedance. Similarly, the phase angle increases when there is a lack of fluid present.