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home > News > Classification of temperature measuring instruments
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Classification of temperature measuring instruments
release date:2015-12-18        Views:5        Back to list

Temperature measuring instruments can be divided into two categories: contact type and non-contact type according to the temperature measurement method. Generally speaking, contact temperature measurement instruments are relatively simple, reliable, and have high measurement accuracy. However, since the temperature measurement element and the measured medium require sufficient heat exchange, it takes a certain amount of time to reach thermal equilibrium, so there is a delay in temperature measurement. At the same time, Due to the limitation of high temperature resistant materials, it cannot be used for very high temperature measurements. Non-contact instrument temperature measurement measures temperature based on the principle of thermal radiation. The measuring element does not need to be in contact with the medium being measured. It has a wide temperature measurement range and is not limited by the upper limit of temperature measurement. It will not destroy the temperature field of the object being measured. The response speed is generally relatively fast but is affected by external factors such as the emissivity of the object, measurement distance, smoke, dust and water vapor, and its measurement error is large.
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