There is an ear thermometer?
In 1714, Gabriel Fahrenheit invented the first mercury thermometer.
sam themo
Santorio Santorio was the first inventor to put a numerical scale on the instrument. Galileo Galilei invented a rudimentary water thermometer in 1593 which, for the first time, allowed temperature variations to be measured. In 1714, Gabriel Fahrenheit invented the first mercury thermometer, the modern thermometer.
Galileo was the first one to invent the thermometer but another guy made a better thermometer than Galileo butt basically it is Galileo who invented the thermometer
The first modern thermometer, the mercury thermometer with a standardized scale, was invented by Daniel Gabriel Fahrenheit in 1714.
In 1866 SirThomas CliffordAll butt invented a clinical thermometer that produced a body temperature reading in five minutes as opposed to twenty.[10] In 1999 Dr. Francesco Pompeii of the Exertion Corporation introduced the world's first temporal artery thermometer, a noninvasive temperature sensor which scans the forehead in about 2 seconds and provides a medically accurate body temperature.
Galileo
Galileo
David Phillips invented the first and best infrared thermometer which to your question is the smallest thermometer therefore the answer is DAVID PHILLIPS;P☻☺☻☺
It was invented by a Polish Man called Daniel Gabriel Fahrenheit
In 1724 Gabriel Fahrenheit invented the first mercury thermometer.