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A thermoscope is a device that shows changed in temperature. A typical thermoscope design is a tube in which liquid rises or falls due to temperature changes. Galileo made the first known thermoscope around 1592. If you add a scale to a thermoscope it makes a thermometer.
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Italian inventor, Santorio Santorio invented the thermoscope. Santorio was the first to apply a numerical scale to his thermoscope. The thermoscope was the invention that measured temperature and which later evolved into the thermometer.
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This liquid-in-glass thermometer was invented by Ferdinand II, the Grand Duke of Tuscany, in 1654. He used alcohol filling in his thermometer. His thermometer was inaccurate as no standardized measurement scale was in use at the time.
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A temperature scale that defines the freezing point of water as 32 degrees and the boiling point of water at 212 degrees.
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A scale of temperature in which 0° represents the melting point of ice and 100° represents the boiling point of water.
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A scale of temperature beginning at absolute zero. Each degree, or kelvin, represents the same temperature increment as one degree on the Celsius scale. On the Kelvin scale water freezes at 273.15 K and boils at 373.15 K.
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An oral thermometer is a clinical thermometer that is placed under the tongue to show body temperature.
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A thermometer used to measure body temperature, especially a small glass thermometer designed with a narrowing above the bulb so that the mercury column stays in position when the instrument is removed from the body.
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A thermometer that registers body temperature from the ear canal. The ear thermometer was invented in 1964 by Dr. Theodor H. Benzinger.
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Invented by Daniel Gabriel Fahrenheit in 1714, the thermometer employing the Fahrenheit scale. The abbreviation 20°F should be read as ‘twenty degrees Fahrenheit’.
