Thermocouple protection tube type is introduced1

Thermocouple technology development is getting better and better, the scope of application is also more and more widely, in many areas has a certain application. Thermocouple, in particular, the role of application in the industry there is a big, including the type of thermocouple protection tube is also very important, so what are specific thermocouple protection tube type, the following specific introduction of engineering.

a metal protecting tube,

metal protection tube high mechanical strength, good thermal performance, wide application, such as K type thermocouple protection tube.

2, non-metallic protection tube

poor heat resistance of the metal protection tube, so the above 1000 ℃ use non-metallic more protection tube; ( B type thermocouple protection tube)

3, metal ceramic protection tube

combination of metal and ceramics to develop a kind of high temperature resistance, corrosion resistance and thermal shock toughness of material, this is metal ceramic;

common protection tube has the following several kinds:

1, 304: temperature 900 ℃, heat resistance, good corrosion resistance, good mechanical strength, suitable for use in oxidizing atmosphere, sulfur resistance, reducing resistance is poorer;

2, 316 l: temperature 930 ℃, good heat, acid, corrosion resistance, suitable for use in oxidizing atmosphere;

3, 2520: temperature 1000 ℃, commonly used as heat resistant steel;

4, 3030: temperature 1100 ℃, commonly used as heat resistant steel;

5, 3039: temperature 1250 ℃, generally used as a strong heat resistant steel;

6, INCOL600: using temperature is 1150 degrees, NI - CR- FE alloy, high temperature oxidation resistance, corrosion resistance is strong, but not suitable for use in sulfur environment;

7, corundum: temperature 1800 ℃, has good high temperature electrical insulation and mechanical strength, good airtight performance, small thermal expansion rate, thermal shock resistance is poor;

8, graphite: temperature 3000 ℃, good thermal conductivity and thermal shock resistance, corrosion resistance, commonly used to measure the liquid steel, hot metal temperature.

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key words: thermal resistance, thermocouple, thermal resistance, platinum resistance, PT100, PT1000, pressure sensor and digital temperature sensor