The advantages and disadvantages of some commonly used thermocouple

In heat treatment industry, chemical industry, we often meet with measuring parameters such as temperature, pressure, the temperature field of application of thermocouple is one of the most commonly used sensors in the temperature field, the advantages and disadvantages of thermocouple, xiamen branch's son automation co. , LTD. The engineers do a simple classification.

a, S type thermocouple, single platinum-rhodium thermocouple

long-term maximum using temperature is 1300 short-term highest use temperature 1600

advantages: high accuracy, good stability, test your area wide, long service life, high temperature oxidation resistance good

disadvantages: low sensitivity and high temperature, mechanical strength is sensitive to pollution, precious metals, expensive investment big

2, K type thermocouple

nickel chromium nickel silicon thermocouple

is currently in the industry to use most thermocouple, is the sum of other types of thermocouple

has better linearity, thermoelectric emfs is larger, high sensitivity, good uniformity, antioxidant ability, as well as the low price

if measuring temperature at 600 degrees, you should choose K type thermocouple

if measuring temperature at 1200 - 1600 you should choose S type or B type thermocouple

thermocouple and thermal resistance is the biggest difference lies in the thermocouple temperature measurement, thermal resistance is low temperature measurement