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Brief introduction of commonly used thermocouple
From;    Author:Stand originally
Commonly used thermocouple has platinic rhodium one platinum, nickel is chromic one nickel silicon (nickel is chromic one nickel is aluminous) , nickel chromium takes an examination of copper, tie Yikang copper. Their characteristic and suitable scope are:
Platinic rhodium one platinic thermocouple, diameter of general alloy silk is 0.5 millimeter, precision is tall, pyroelectricity power is greater, performance is steady, it is better to fight oxidisability, can use for a long time inside furnace of 1300 ℃ high temperature. Defect is the price tall, unfavorable make in reducing atmosphere
With.
Nickel is chromic one nickel silicon and nickel chromium one nickel aluminous thermocouple, alloy silk diameter is 3 millimeter, its hot electromotive force is larger, precision is taller, low-cost, it is better also to fight oxidisability, can use for a long time inside 900 ℃ the following furnace. Defect is material pledges hard.
Nickel chromium takes an examination of cupreous thermocouple, its hot electromotive force is very large, sensitivity is tall, low-cost, appropriate is used in reducing atmosphere, use temperature does not exceed 600 ℃ . Defect is easy oxidation.
Thermocouple of Tie Yikang copper, pyroelectricity power is greater, sensitivity is tall, the price is low, appropriate is used for a long time in 600 ℃ the following reducing atmosphere. Defect is easy oxidation.