Used Fingertip skin conductance sensor for Thought Technology ProComp 2, ProComp+ and Infiniti units.

Used Procomp+ SCR assembly is made up of two pieces. The SA9309P cable is approximately 48 in (122.5 cm) in length and is terminated with two snap receptacles. Two SE35 Velcro (AgAgCL button) style finger sensors simply snap into the cable. The botton sensor, approximately 8mm in diameter, is embedded into the Velcro band and secured around the finger by connecting the Velcro. Operating Principle
A small voltage is applied to the skin between two sensors and the skin's current conduction is measured. Skin Conductance is considered to be a function of sweat gland activity and skin pore size, both of which are controlled by the sympathetic nervous system. Sweat glands are activated when the sympathetix nervous system is aroused in response to stress or anxiety. As sweat is produced, the skin's capacity to conduct current is enhanced and the measured conductance is increased. Measurement Unit:
Normally set as micromhos Sensor Placement:
Usually the two sensors are attached to the pad (finger print) side of the tip of the fingers. Range:
0 30i Semens (.5 50 micromohs)