Temperature is encountered every day of life, where it plays an important role in the reproducibility of product quality, in profitability in production processes and in the reliability of operating devices and equipment. In addition to pressure, it is one of the most commonly measured physical quantities in technologies. To measure temperature, we use thermometers, which are divided into several groups and have different temperature scales. The thesis focuses mainly on thermometers used to measure temperature in industry, their operation and the temperature range in which they can be used. The introduction presents the history of the first beginnings of temperature measurement and the development of thermometers, as well as the temperature scale. The main part describes the thermometers used mainly in industry, their characteristics and principles of operation. In the concluding part, a short summary of the main part is made, where the advantages and disadvantages of the thermometers that have been describedare presented.
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