K / J type Thermocouple Wire With Connector 

Description :
A thermocouple is a temperature measuring device consisting of two conductors of dissimilar metals or alloys that are connected only at the ends. When the ends are at different temperatures a small voltage is produced in the wire that can be related directly to the temperature difference between the ends. If the temperature at one end is known, the temperature at the other end can be determined. 

K Type Thermocouple Wire is the most common type of thermocouple. It"s inexpensive, accurate, reliable, and has a wide temperature range.
The type K is commonly found in nuclear applications because of its relative radiation hardness. Maximum continuous temperature is around 1,100C. 

Type K Temperature Range:

Thermocouple grade wire	-454 to 2,300F (-270 to 1260ºC)
Extension wire	32 to 392F (0 to 200ºC)

Type K Accuracy (whichever is greater):
--Standard: +/- 2.2C or +/- .75%
--Special Limits of Error: +/- 1.1C or 0.4%

Consideration for bare wire type K thermocouple applications:
--The Type K is made with two alloys of high nickel content which allows their use in both oxidizing and reducing atmospheres
--It is necessary to take the precautions when reducing atmospheres.

Types of thermocouple extension wire

Thermocouple Code	Comp. Type	Comp. Wire Name	Positive.		Negative
			Name	Code	Name	Code
K	KCA	Iron-constantan22	Iron	KPCA	Constantan22	KNCA
K	KCB	Copper-constantan 40	Copper	KPCB	Constantan 40	KNCB
K	KX	Chromel10-NiSi3	Chromel10	KPX	NiSi3	KNX

Nominal chemical composition

Name of Wire	Grade	Nominal Composition /%
		Cu	Ni	Cr	Si	Fe	Mg
Fe-CuNi22	KPCA	-	-	-	-	100	-
Cu-Ni 40	KPCB	60	40	-	-	-	-
Ni-Cr 10	KPX	-	90	10	-	-	-

 
Specification of alloy wire

Dia of Wire/mm	The number of core strands	Nominal cross-sectional area/mm2
0.20	7	0.2
0.30	7	0.5
0.41	19	2.5
0.43	7	1.0
0.52	7	1.5
0.52	1	0.2
0.80	1	0.5
1.13	1	1.0
1.38	1	1.5
1.78	1	2.5

Thermal EMF range and tolerance

Graduation	Grade		Measuring temperature/ºC	Nominal value/μV	Class 1		Class 2
					Tolerance μV	Thermal EMF Range μV	Tolerance μV	Thermal EMF Range μV
K	KX,KCA,KCB	G	-25	-968	±44	-924~-1012	±88	-880~-1056
			100	4096		4052~4140		4008~4184
K	KX KCA	H	-25	-968	±44	-924~-1012	±88	-880~-1056
			100	4096		4052~4140		4008~4184
			200	8138		8094~8182		8050~8226

The color code of thermocouple cable



More color code can be tailor-made as per your request.