The 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. This response to a stimulus is called the phasic change. During relaxation, the skin conductance should decrease and it usually shows less variation. The smooth slow change of the skin conductance is a tonic change.

The sensor comes with Ag-AgCL velcro straps snap-on electrodes, which can be used over 100 times. The electrodes are attached to the fingers of the non-dominant hand. 

Skin conductance is expressed in micro Siemens. Sweating is controlled by the sympathetic nervous system and this response is closely related to arousal. The sensor has been designed to measure minute (1/1000) micro Siemens relative changes in sweat activity.

Features

The GSR Sensor for NeXus offers:

• Skin Conductance Sensor 
• For the Q32 the combined Skin Conductance / Temperature Sensor
• Adjustable velcro straps for every size finger
• Easy snap-on leads

Specifications

Systems

The Skin Conductance Sensor is available in 1 type NeXus: for the NeXus |10, NeXus | Q24 and NeXus | 4, NeXus | 32F. This sensor comes with a ODU Aluminum connector. 

For the NeXus | Q32 the Combined Skin Conductance Temperature Sensor is available and comes with a black plastic ODU connector.