WL thermocouple wire Type K

NiCr-NiSi (Type K) thermocouple finds the widest use in all basemetal 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