Doctors Warn Against Infrared Thermometers
In the test, reported last month in the journal Medicine and Science in Sports and Exercise, the infrared thermometer gave readings below 100 degrees Fahrenheit when rectal thermometers topped 104 degrees, a temperature at which some patients begin to become vulnerable to heatstroke.
Douglas J. Casa, director of athletic training education at the University of Connecticut, who recently completed a study of 10 types of thermometers in intense training situations, said the infrared forehead and ear scanners were among those producing misleadingly low readings in his test.