### device | instrument | measuring device:

Thermometer
* Many thermometers contain mercury, a silver-colored liquid
  - have a calibration nut under the dial that can be adjusted
  - use the expansion of liquids in a tube to measure the temperature
* Most thermometers have a calibration nut under the dial that can be adjusted.
* Most thermometers measure air temperature
* Some thermometers allow four-color process imprinting
  - measure energy
* also can prevent food from being cooked too long and becoming too dry.
* are a great investment in food safety
  - significant contributor to mercury pollution in the environment
  - an example of using thermal expansion
  - at the mercy of the elements reflecting their temperature
  - devices
  - for measuring temperature
  - inexpensive and easy to use
  - key to safety
  - doctors
  - hospitals
  - the only reliable method for determining doneness
* are used in the production of candy
  - to measure the amount of heat that is in the atmosphere
  - vital for checking the temperature of the tank water
* break easily, and older ones are made of glass containing toxic mercury.
* check temperature increases in the area, and gas detectors measure the amount of gas.
* come in a variety of styles.
* consist of a sealed hollow glass tube filled with some type of liquid.
* do go down and snow does pile up.
* have two different scales to measure temperature.
* help take the guesswork out of food safety.
* includes capillaries
  - readsides
  - sections
* increasingly use electronic means to provide a digital display or input to a computer.
  - levels
  - only the cold
  - temperature absolutely
* protrude from windrows.
* provides instant temperature readings on any surface.
* relay important, even life-saving information.
* use a temperature scale to record how hot or cold something is
  - fluids because they change dramatically, and the differences are easily observed
  - physical properties ranging from electrical resistance to radioactivity
* utilize a range of physical effects to measure temperature.
* work because matter expands when heated
  - of the uniform expansion and contraction of specific substances
+ Temperature: Weather measurements :: Heat :: Physical quantity :: Thermodynamics :: Basic physics ideas
  * Our bodies can feel the difference between something which is hot and something which is cold. To measure temperature more accurately, a thermometer can be used. Thermometers use a temperature scale to record how hot or cold something is.
+ Thermal expansion: Thermodynamics

### device | instrument | measuring device | thermometer:

Digital thermometer
* Most digital thermometers are easy to use and measure body temperature within seconds
  - read the temperature at the tip
* are also more accurate and easier to use
  - as accurate as glass ones, and are faster
  - fairly accurate and have an instant readout
* come in many sizes and shapes, and some can be quite expensive.
* contain a button cell battery that contains a very small amount of mercury.
* measure temperature by means of a slender device called a probe.
* offer an environmentally-preferable alternative to mercury thermometers.
* produce accurate readings more quickly than mercury thermometers.
* take an immediate temperature reading in the ear and are easy to use.
* use electronic circuits and devices to show temperature measurements.
* work just as well.

Food thermometer
* come in several styles, including instant-read digital or dial thermometers
  - types and styles and range in level of technology and price
* measure the exact temperature of the food being cooked.