I'm looking into a project relating to skin resistance, I believe its called the Galvanic Skin responses; the changes in resistance of the skin due to external stimuli. Planning to use this for a persons reaction to allergies perhaps to food or certain materials, etc., I believe that sweating or other reactions of the body changes your skin's electrical resistance and the device would messure how it changes. These things are fairly common in clinics in other countries, Germany for one, and I'd like to make one. Anyone know any resources for this? perhaps a consultant/engineer who has any experience?
It's based on the same principle of Galvanic Skin Response to make a crude lie detector test. I believe the effects may be trasferrable. The application you are thinking would still change the electric conductivity of the skin i think. Try and go about building the device and then adjust it for sensitivity later on. Good luck!