Compensating

Thermocouple Extension & Compensation Wire

Thermocouple compensating wire is used to connect the electrode (cold side of thermocouple) with display instrument in order to form a temperature measurement system. The working temperature is -25~200℃.

Our plant mainly manufacture type KX, NX, EX, JX, NC, TX, SC/RC, KCA, KCB and WREC compensating wire for thermocouple, and they are used in temperature measurement instruments and cables. Our thermocouple compensating products are all made abiding by GB/T 4990-2010 ‘Alloy wires of extension and compensating cables for thermocouples’ (Chinese National Standard), and also IEC584-3 ‘Thermocouple part 3-compensating wire’ (International standard).

EMF of compensating wire and the tolerance

Thermocouple	Compensatingand extension Wire type	Usage Classification	Measuring junction	Standard EMF	Precision grade		General level
No.indexing	Compensatingand extension Wire type	Usage Classification	temperature/℃	value/μV	Tolerance μV	Thermal EMF range μV	Tolerance μV	Thermal EMF range μV
S or R	SC or RC	G	100	646	±30	616-676	±60	586-706
		H	100	646	-	-		586-706
		H	200	11441	-	-		1.381~1501
K	KX, KCA or KCB	G	-25	-968	±40	-924~-1012	±80	-1936
		G	100	4096		4052~4140	±80	4008~4184
		H	-25	-968		-924~-1012	±88	-1936
			100	4096		4052~4140		4008~4184
			200	8138		8094~8182		8050~8226
N	NX or NC	G	-25	-646	±43	-1292	±86	-1292
		G	100	2774		2731~2817		2688~2860
		H	-25	-646		-1293		-1292
			100	2774		2731~2817		2688~2860
			200	59123		5870~5956		5827~5999
E	EX	G	-25	-1432	±81	-2864	±138	-2864
		G	100	6319		6238~ 6400		6181~6 457
		H	-25	-1432		-2864		-2864
			100	6319		6238~6400		6181~6457
			200	13421		13340~13502		13283~13559
J	JX	G	-25	-1239	±62	-2478	±123	-2478
		G	100	5269		5207~5331		5146~5392
		H	-25	-1239		-1478		-2478
			100	5269		5207~5331		5146~5392
			200	10779		10717~10841		10656~10902±1℃or±1.5%t
T	TX	G	-25	-940	±30	-910 970	±60	-1850
		G	100	4279	±30	4249~4309		4189~4339
		H	-25	-940	±48	-1880		-1880
			100	4279		4231~4327		4189~4369
			200	9288		9240~		9198~9378

Resistivity

Compensation wire type	Reciprocating resistance at ℃ Ω/m(less than)
Compensation wire type	0.2mm2	0.5mm2	1.0mm2	1.5mm2	2.5mm2
SC or RC	0.25	0.10	0.05	0.03	0.02
KCA	3.50	1.40	0.70	0.47	0.28
KCB	2.60	1.04	0.52	0.35	0.21
KX	5.50	2.20	1.10	0.73	0.44
EX	6.25	2.50	1.25	0.83	0.50
JX	3.25	1.30	0.65	0.43	0.26
TX	2.60	1.04	0.52	0.35	0.21
NC	3.75	1.50	0.75	0.50	0.30
NX	7.15	2.86	1.43	0.95	0.57