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A medical mercury-in-glass maximum thermometer showing the temperature of 38.7 °C (101.7 °F). One special kind of mercury-in-glass thermometer, called a maximum thermometer, works by having a constriction in the neck close to the bulb. As the temperature rises, the mercury is pushed up through the constriction by the force of expansion.
Such thermometers are usually calibrated so that one can read the temperature simply by observing the level of the fluid in the thermometer. Another type of thermometer that is not really used much in practice, but is important from a theoretical standpoint, is the gas thermometer. Other important devices for measuring temperature include:
Thermometers are used in roadways in cold weather climates to help determine if icing conditions exist. Indoors, thermistors are used in climate control systems such as air conditioners, freezers, heaters, refrigerators, and water heaters. [56] Galileo thermometers are used to measure indoor air temperature, due to their limited measurement range.
A Celsius Galilean thermometer in two degree gradations. A risen orange orb denotes 24 °C. A Galileo thermometer (or Galilean thermometer) is a thermometer made of a sealed glass cylinder containing a clear liquid and several glass vessels of varying density. The individual floats rise or fall in proportion to their respective density and the ...
Delisle chose his scale using the temperature of boiling water as the fixed zero point and measured the contraction of the mercury (with lower temperatures) in hundred-thousandths. [1] Delisle thermometers usually had 2400 or 2700 gradations, appropriate for the winter in St. Petersburg , [ 2 ] as he had been invited by Peter the Great to the ...
Cook the mixture until it reaches 300 degrees when measured with a candy thermometer. Remove from heat, and add the baking soda, ¼ cup of the citric acid, extract, and food coloring, and stir to ...
If you need gift ideas, you can score the ThermoPop for just $20, or 43% off one of America's Test Kitchen's favorite meat thermometers. It makes the perfect stocking stuffer for the home chef on ...
Add a little more water if it dries up, as you want steam created in the oven. Remove turkey from the oven when the temperature reaches 180 degrees in the thigh, or when internal thermometer pops ...
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