Temperature ? a term that we use almost daily as a matter needless to say, without being made aware of the physical correlations. But how is the term temperature defined?
Everybody perceives temperature within their environment purely subjectively. If we are too warm or too cold, it is just a feeling, which might be different from individual to individual ? because not everyone gets cold at the same speed. The term temperature ? or, better, the condition, that influences (among other activities) our mind-set ? is chatted about daily whenever we are discussing the expected temperature from the weather forecast with friends, acquaintances or colleagues.
Temperature
With the word temperature (from the Greek ?thermis? = warm), a particular thermal state of a body is described. Heat is really a measure of the energy of a body, that is generated by the random motion of its atoms or molecules in the body? weksler pressure gauge ราคา . Here, the temperature may be the magnitude of a state which establishes the power content associated with other physical quantities (mass, heat capacity).
Temperature unit
The unit of temperature is the Kelvin. At a temperature of 0 K, all atoms or molecules within a body are in rest ? all motion in the body is frozen. One describes this state as the absolute zero point. The Celsius temperature scale which is more common in our latitudes defines the zero point because the freezing point of water, since this problem could possibly be reproduced without great technical effort in past times.
Temperature measurement
Different physical properties are directly influenced by the temperature and thus are employed for temperature measurement, such as, for example:
the dependence of expansion on temperature
the change in electrical resistance with temperature
voltage generation with respect to the temperature
temperature-dependent frequency fluctuations
changes in the wavelength of the radiation of a body, depending on temperature
Note
Information on our temperature measuring instruments are available on the WIKA Website.