Development and testing of a perspiration measuring system.

Sweating measurement is a very useful tool for the physiological health state of the human body. A sweating measuring system developed in this study was composed of several sensors. All sensors were calibrated to ensure the accuracy. Three pretreatment physiological states for test subjects before sweating measurement included sit and rest for 5 min, walking for 5 min, and running for 5 min. The whole sweating value was measured and calculated over 5-min periods. The results of sweating measurement indicated the usefulness of this device. The sweating quantity of three states did not have a significant relationship with the height, weight and body mass index (BMI) values of subjects. The first sweating index is the difference between active treatment and sitting state. The second sweating index is the ratio between active state and sitting. The relationship between two sweating index and BMI values could be found. This device could serve as a detecting tool to establish the sweating database for normal conditions and to be used for diagnosis.