Regardless of what type of sensor is used, every ear thermometer has either a four- or eight-bit microprocessor.

The idea behind the temperature sensor in the ear thermometer is to create a device that is sensitive to very subtle changes in infrared emission.

Since the year 2000, small ear thermometers have become available.

There are enough staff members with ear thermometers at the airport and train station that families with children seldom face delays of more than a minute.

A typical inexpensive electronic ear thermometer for home use has a displayed resolution of 0.1 C, but a stated accuracy within 0.2 C when new.

They concluded that ear thermometers are not accurate enough to be used in situations where body temperature needs to be measured with precision.

Using a digital ear thermometer from the bag, he verified that the peddler's temperature was elevated, but not dangerously so.

People using ear thermometers should take repeated readings to increase their reliability, she said.

Infrared ear thermometers are notorious among doctors for their inaccuracy.

And he held patents on 40 inventions, the most famous the ear thermometer, which he developed in 1964.