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NiCr-NiSi (Type K) thermocouple wire

NiCr-NiSi (Type K) thermocouple finds the widest use in all base metal thermocouple, at temperature above 500℃。The main chemical composition of  positive leg NiCr (KP) are Ni≈90% and Cr≈10%; negative leg NiSi (KN) are Ni≈97% and Cr≈3%. The operating temperature range is -200~1300℃(for short term) and 0~1100℃( for long term)
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NiCr-NiSi (Type K) thermocouple finds the widest use in all base metal thermocouple, at temperature above 500℃。The main chemical composition of  positive leg NiCr (KP) are Ni≈90% and Cr≈10%; negative leg NiSi (KN) are Ni≈97% and Cr≈3%. The operating temperature range is -200~1300℃(for short term) and 0~1100℃( for long term).

Type K thermocouple has strong resistance to oxidation than other base metal thermocouples. It has high EMF against Platinum 67, excellent temperature accuracy, sensitivity and stability, with a low cost. It is recommended for oxidizing or inert atmospheres, but cannot be used directly in the following cases:
(1) Alternatively oxidizing and reducing atmosphere,
(2) Atmosphere with sulphur gases
(3) Long time in vacuum
(4) Low oxidizing atmosphere such as hydrogen and carbon monoxide atmosphere


Thermocouple temperature range and tolerance

Name

热电偶名称

 

Usag Classification

分度

Grade

等级

Operating temperature range (℃)最高使用温度范围

 

Temperature range(℃)  温度范围

 

Tolerance

允许偏差

Standard

 

热行标准

Long term长期

Short term

短期

NiCr-NiSi-NiAl (Type K) thermocouple bright wire

镍铬-镍硅(K型)热电偶

K

I

1200

1300

-40~1100

+1.5℃ or +0.4%t

GB/T2614

 

-40~1300

 

+2.5℃ or +0.75%t

 * Operating temperature range (℃) 最高使用温度范围指下列规格: Ø3.2mm。


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