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The developing course of thermocouple _ instrument

by:JVTIA     2020-10-28
Thermocouple with explosion danger can be used in place of temperature measurement. Thermocouple temperature measurement principle and the thermocouple temperature measurement principle, the thermocouple is based on the development of resistance thermocouple, depends largely on its core components, the development of platinum thermocouple parts. From traditional mica platinum thermocouple parts, ceramic platinum thermocouple parts, glass platinum thermocouple parts to the thick film platinum thermocouple parts and thin film platinum thermocouple parts, the development direction of platinum thermocouple parts has been transferred to the membrane structure of products, especially in thin film platinum thermocouple parts. From 1974, the introduction of film technology development film platinum thermocouple parts, successfully solve the problem of the cost and application of platinum thermocouple parts, has been more than 30 years of history, with the development of photographic plate printing technology, thin film platinum thermocouple parts of development by leaps and bounds in recent years. Resistance temperature measurements of thermal effect, that is, to the characteristics of the resistance varies with temperature changes. Therefore, as long as the measured temperature thermocouple resistance changes, can measure the temperature of thermocouple through the special structure of the junction box, prefabricated thermocouple to the shell internal explosive mixed gas by affected by sparks or electric arc explosion limit within the junction box, that wouldn't make production field explosion.
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