Thermocouple compensating wire alloy wire

Product Introduction
Alloy wire for thermocouple compensating cables is a core conductive material for industrial temperature measurement systems, used as the alloy conductor for manufacturing compensating cables. Made from nickel, chromium, silicon, copper and other metals with precise proportioning, it features low thermoelectric drift, high oxidation resistance, acid and alkali corrosion resistance, good flexibility and weldability. It can accurately transmit thermocouple thermoelectromotive force, compensate cold-end temperature errors, and ensure stable temperature measurement.

Applications & Instructions
1. Power Industry
Temperature monitoring and signal transmission for boilers, steam turbines, generator sets and other equipment in thermal power plants.

2. Petrochemical Industry
High, medium and low temperature measurement systems for oil refining units, reaction kettles, heating furnaces, pipelines and storage tanks.

3. Metallurgy & Steel
Temperature detection under high-temperature working conditions such as blast furnaces, converters, annealing furnaces, heat treatment furnaces and continuous casting lines.

4. Building Materials & Cement
Temperature signal transmission for cement rotary kilns, preheaters, kiln inlet / kiln ends and various industrial kilns.

5. Machinery Manufacturing
Temperature measurement for heat treatment equipment, forging, casting, welding equipment, industrial ovens and drying equipment.

6. HVAC & Automation
Temperature collection for central air conditioning, industrial heat exchange equipment, DCS control systems and instrument control cabinets.

Instructions
Connect one end firmly to the thermocouple cold end, and the other end to temperature instruments, transmitters or acquisition modules. Connections should be crimped, welded or fixed with special terminals to ensure good contact.

PREV：Constantan alloy wire NEXT：Thermocouple alloy wire

Core Advantage Specification

Q1: Can compensating alloy wires of different types be mixed?
A1: No. Compensating alloy wires of K, E, J, T, N and other types have different compositions and thermoelectric characteristics. Mixing will cause serious temperature measurement errors. They must be matched with the corresponding type of thermocouple.

Q2: What happens if positive and negative poles are reversed?
A2: It will cause reverse superposition of thermoelectromotive force, resulting in seriously low or fluctuating temperature display. Long-term reversal may also affect the stability of instrument readings. The positive and negative poles must be distinguished by color codes during wiring.

Q3: Can compensating alloy wire be used as ordinary power wire?
A3: No. It is an alloy material designed specifically for thermoelectric signal transmission. Its conductivity and current-carrying capacity are different from ordinary wires. It is only suitable for temperature signal circuits and cannot be used for power supply lines.

Q4: What is the effect of excessively high ambient temperature?
A4: Exceeding the allowable operating temperature (usually ≤200°C) will cause oxidation of the alloy wire, drift of thermoelectric characteristics, insulation aging, and even direct failure, making temperature measurement accuracy unguaranteed.

Q5: Can the alloy wire still be used with slight surface oxidation?
A5: Slight oxidation generally does not affect use. If serious oxidation, blackening, embrittlement or peeling occurs, it will cause poor contact and unstable signals. Replacement is recommended in time.

EMF of compensating wire and the tolerance
Thermo couple No.indexing	Compensating And extension Wire type	Usage Classif ication	Messuring junction temperture ℃	Standard EMF Value μV	Precisiongrade		Generallevel
Thermo couple No.indexing	Compensating And extension Wire type	Usage Classif ication	Messuring junction temperture ℃	Standard EMF 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	—	—	±60	586~706
		H	200	1441	—	—	±60	1381~1501
K	KX, KCA or KCB	G	-25	-968	±44	-924~-1012	±88	-880~-1056
		G	100	4096	±44	4052~4140	±88	4008~4184
		H	-25	-968	±44	-924~-1012	±88	-880~-1056
			100	4096	±44	4052~4140	±88	4008~4184
			200	8138	—	—	±88	8050~8226
N	NX or NC	G	-25	-646	±43	-603~-689	±86	-560~-732
		G	100	2774	±43	2731~2817	±86	2688~2860
		H	-25	-646	±43	-603~-689	±86	-560~-732
			100	2774	±43	2731~2817	±86	2688~2860
			200	5913	—	—	±86	5827~5999
E	EX	G	-25	-1432	±81	-1351~-1513	±138	-1294~-1570
		G	100	6319	±81	6238~6400	±138	6181~6457
		H	-25	-1432	±81	-1351~-1513	±138	-1294~-1570
			100	6319	±81	6238~6400	±138	6181~6457
			200	13421	—	—	±138	13283~13559
J	JX	G	-25	-1239	±62	-1177~-1301	±123	-1116~-1362
		G	100	5269	±62	5207~5331	±123	5146~5392
		H	-25	-1239	±62	-1177~-1301	±123	-1116~-1362
			100	5269	±62	5207~5331	±123	5146~5392
			200	10779	—	—	±123	10656~10902
T	TX	G	-25	-940	±30	-910~-970	±60	-850~-1000
		G	100	4279	±30	4249~4309	±60	4189~4339
		H	-25	-940	±48	-892~-988	±90	-850~-1030
			100	4279	±48	4231~4327	±90	4189~4369
			200	9288	—	—	±90	9198~9378

Compensating wire type	Reciprocating resistanceat 20℃ Ω/m (less than)
Compensating wire type	0.2mm²	0.5mm²	1.0mm²	1.5mm²	2.5mm²
SC or RC	0.25	0.1	0.05	0.03	0.02
KCA	3.5	1.4	0.7	0.47	0.28
KCB	2.6	1.04	0.52	0.35	0.21
KX	5.5	2.2	1.1	0.73	0.44
EX	6.25	2.5	1.25	0.83	0.5
JX	3.25	1.3	0.65	0.43	0.26
TX	2.6	1.04	0.52	0.35	0.21
NC	3.75	1.5	0.75	0.5	0.3
NX	7.15	2.86	1.43	0.95	0.57