Detecting clouds for remote telescope operation Checking mechanical or electrical equipment for temperature and hot spots Measuring the temperature of patients in a hospital without touching them Checking heater or oven temperature, for calibration and control Checking for hot spots in fire-fighting Monitoring materials in processes involving heating or cooling Measuring temperature of volcanoes At times of epidemics of diseases causing fever, such as SARS coronavirus and Ebola virus disease, infrared thermometers have been used to check arriving travellers for fever.[1][2][3]