Infrared thermometers for humans consist of an IR probe, electronic circuitry, a microprocessor, and an LCD or LED display. In fact, many attempts were made to this end, to establish a link between fever and clinical diagnosis.Research had shown that body temperature is a nonlinear function of several variables such as age, state of health, gender, environmental temperature, time of the diurnal cycle, among many others.The main types of non-contact thermometers are non-contact infrared thermometers, and thermal scanners. Traditionally, body temperature has been measured using contact thermometers that are placed on the forehead or in the mouth.Non-contact thermometers allow a person’s temperature to be taken with minimal or no contact with the person. Prime members enjoy FREE Delivery and exclusive access to music, movies, TV shows, original audio series, and Kindle books. You begin to sweat and as the sweat evaporates it helps to cool the body.Conversely, when the body is cold, the blood flow to the skin is decreased allowing conservation of body heat.The involuntary act of shivering causes the muscles to generate more heat than can be conserved. 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You may have heard that the “normal” body temperature is 98.6°F (37°C). After viewing product detail pages, look here to find an easy way to navigate back to pages you are interested in.After viewing product detail pages, look here to find an easy way to navigate back to pages you are interested in. Under normal conditions, these reactions of the body to hot and cold keep body temperature within a narrow safe rangeBody temperature can be measured in many locations of the body. $27.99 $ 27. Most commonly temperature measurements are taken in the mouth, ear, armpit, or rectum.