The common structure popularity of thermocouple

1, nickel chromium - Nickel silicon ( Or nickel chrome Nickel aluminum)

thermocouple nickel chrome - Nickel silicon models for VREU thermocouple. The EU is dividing Numbers. Nickel chrome for the '+', nickel silicon as the 'a'. In oxidizing and neutral medium, can under 900 ℃ using for a long time, but not in reducing medium resistance. It thermoelectric potential is large, and has good linear relationship with temperature, the price is cheap, but the precision is low.

2, copper - Copper constantan thermocouple

- Models for WRCK constantan thermocouple. CK for indexing. Copper for the '+', constantan for 'a'. Under 300 ℃ the better linear relation, and the price is low. It is thermocouple used in the laboratory.

3, platinum, rhodium - 10% Platinum thermocouple

platinum basking - 10% Platinum thermocouple type for WTLB, WT refers to the thermocouple, LB for indexing, platinum rhodium alloy wire for the '+', pure platinum wire is' a '. Under 1300 ℃ can use for a long time. Under the condition of good environment, can be 1600 ℃ high temperature measurement. Generally it used as a benchmark precision measurement and thermocouple. In the oxidizing and neutral medium, platinum rhodium - Platinum thermocouple stable physical and chemical performance, but at high temperature are susceptible to reducing sour gas invasion. Its thermoelectric potential is weak, the price also more expensive.

4, nickel chromium - Copper thermocouple

nickel chromium - test Take an examination of copper models for WREA thermocouple. EA for indexing. Nickel chrome for the '+' plate, copper for 'a'. In a reducing and neutral medium, can use for a long time under 600 ℃, and at 800 ℃ can be used in the short term. Its sensitivity is higher, the price is cheap.

5, platinum, rhodium - 30% Platinum rhodium thermocouple

6% platinum rhodium - 30% Models for WRLL 6% platinum-rhodium thermocouple. LL for indexing. Platinum rhodium 30% '+', platinum rhodium for '- 6% '. It can be use for a long time under the high temperature of 1600 ℃, 1800 ℃ in short-term use. The thermocouple stable performance and high precision. Suitable for oxidizing and neutral medium, but its minimal thermoelectric potential, prices are higher.

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