Skin Conductance (GSR) SensorThe GSR Sensor measures sweat gland activity at the fingers or in the palm of the hand. Skin Conductance (SC) is also known as galvanic skin response (GSR) or electrodermal activity (EDA). SC, is the measurement of the electrical conductivity of the skin. During stress, the skin conductance and transpiration is expected to rise and become more variable. It reflects the level of psychological or physiological arousal, elicited by cognition or emotions.