新闻资讯

News Center

current position: Home > News Center > Industry information

Various thermocouple characteristics and measurement temperature range

2022-02-14 16:53:07
times

There are many kinds of thermocouple indexing number, here Beijing Haohai Yantian summarized several thermocouple commonly used indexing number corresponding characteristics and measurement temperature scale!


One, S type thermocouple:

热电偶


Platinum rhodium 10-Platinum thermocouple, temperature scale 0 ~ 1300℃;


Advantages of TYPE S thermocouple:


1. Excellent heat resistance, stability, reproducibility and superior accuracy;


2. Excellent oxidation resistance and corrosion resistance;


3, can be used as a standard.


S type thermocouple defects: 1, thermoelectric emf value is small, compensation wire error;


2. High price;


3, in the return gas environment is weak. (especially hydrogen, metal vapour)


Two, R thermocouple:


Platinum rhodium 13-Platinum thermocouple, temperature scale 0 ~ 1300℃;


Advantages of R type thermocouple:

1. Excellent heat resistance, stability, reproducibility and superior accuracy;


2. Excellent oxidation resistance and corrosion resistance;


3, can be used as a standard.


Type R thermocouple defects:


1, thermoelectric emf value is small, compensation wire error;


2, in the reducing gas environment is weak (especially hydrogen, metal vapor);


4, the price is high.


Iii. Type B thermocouple:


Platinum-rhodium 30-Platinum-rhodium 6 thermocouple, temperature scale 0 ~ 1600℃;


B type thermocouple advantages: 1, oxidation resistance, corrosion resistance and turbidity outstanding;


2. Thermoelectric EMFS are very small at room temperature, without compensating wires;


3. Better heat resistance and mechanical strength than R type.


Defects of type B thermocouple: 1. The thermoelectric emf is very small in the middle and low temperature domain, and the measurement temperature below 600℃ is not accurate;


2, thermoelectric emf value is small, thermoelectric EMF linearity is not good;


3, the price is more expensive than S degrees;


Four, K type thermocouple:


Ni-cr - Ni-Si thermocouple, temperature scale 0 ~ 1300℃;


K type thermocouple advantages: 1, the linear thermoelectric emf outstanding;


2. Excellent oxidation resistance below 1000℃;


3, in metal thermocouple safety is outstanding.


Type K thermocouple defects: 1, thermoelectric emf and precious metal thermocouple changes greatly when compared;


2, not suitable for reducing gas environment;


3. Errors may occur due to the influence of short scale sorting.


Five, N-type thermocouple:


Nickel-chromium-silicon thermocouple, temperature scale -270 ~ 1300℃;


N-type thermocouple advantages:


1. Excellent oxidation resistance below 1200℃.


2. Excellent linearity of thermoelectric emFS.


N-type thermocouple defects:


1, not suitable for reducing gas environment


2. Thermoelectric emFS vary greatly when compared with precious metal thermocouples.


Six, TYPE E thermocouple:


Nickel-chromium-silicon - constantan thermocouple, temperature scale -270 ~ 1000℃


Advantages of TYPE E thermocouple:


1. Good sensitivity in thermocouple;


2. Excellent heat resistance compared with J thermocouple;


3, suitable for oxidizing gas environment.


4, low price


Defect of type E thermocouple: not suitable for reducing gas environment


Vii. J thermocouple:


Fe-constantan thermocouple, temperature scale -210 ~ 1000℃;


Advantages of J thermocouple:


1, can be used in reducing gas environment


2. Thermoelectric EMF is 20% larger than K thermocouple.


3, the price is cheaper, suitable for medium temperature area.


J thermocouple defects: easy to rust, poor reproducibility.


Eight, T thermocouple:


Copper -- Constantan thermocouple, temperature scale -270 ~ 400℃;


T thermocouple advantages:


1. Excellent linearity of thermoelectric emFS.


2, low temperature characteristics of outstanding


3. Excellent reproducibility and high precision.


Advantages and disadvantages of T thermocouple: low temperature limit.


Tags

Recently Viewed:

Related products

news.related_news

0575-82158601

Company: Zhejiang Chunhui Instrument Co., LTD

Address: 101 Mingyue Road, Shangyu District, Shaoxing City, Zhejiang Province