Quantitative radiometric measurement of skin temperature.

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Abstract
Although infrared thermograms have been employed for assessing skin temperatures for some time, precise quantitative measurements have been lacking. A simple radiometer has been constructed and a method devised by which the surface temperature of the forearm and hand can be precisely measured. The instrument has a precision of [plus or minus] 0.1 C. Measurements show the variation of the front surface of the forearm in neutral thermal conditions to be, at extremes, + 1.7 C and [long dash]2.3 C from the mean. Temperature patterns vary to some degree when the hand is heated or cooled. The magnitude of the variations is essentially unchanged during heating but is approximately doubled during cooling.