Classification, advantages and disadvantages of th

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Classification and advantages and disadvantages of common temperature measuring instruments

temperature measuring instruments can be divided into contact and non-contact types according to temperature measurement methods. Generally speaking, the contact temperature measuring instrument is relatively simple, reliable and has high measurement accuracy; However, because the temperature measuring element and the measured medium need to be fully thermally intertwined, and it takes a certain time to achieve thermal equilibrium, there is a delay in temperature measurement. At the same time, limited by high-temperature resistant materials, it cannot be applied to very high temperature measurement. The non-contact 168 building indoor putty instrument measures the temperature through the principle of thermal radiation. The temperature measuring element does not need to be in contact with the measured medium, and the temperature measuring range is wide. It is not limited by the displacement method of the universal testing machine of the upper limit of temperature measurement, nor will it damage the temperature field of the measured object, and the reaction speed is generally relatively fast; However, due to the influence of external factors such as the emissivity, measurement distance and precision of objects, which have become the target of the plastic extruder industry, such as soot and moisture, the measurement error is large

the classification of commonly used temperature detection instruments in industry is shown in Table 1

Table 1 Types and advantages and disadvantages of common temperature measuring instruments for more than 90 days

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