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ohmalloy insulated heater wire

Thermocouple Wire

OHMALLOY have 20 years in producing the thermocouple alloy wire.  In order to ensure the quality of our thermocouple wire, we have the product undergo smelting in a vacuum furnace, argon & hydrogen annealing and continuous wire drawing, among other processes.

For the diameter large than 1.2mm, we usually provide the Oxidized status wire. And for the diameter less than 1.2mm, we can offer bright wire packed on spool such as DIN80, 125, 160, 200.

Before sending out, we test each batch of thermocouple bare wire and will issue the report for each spool or coil of wire.

high temperature thermocouple

OHMALLOY’s type K wire have long time stability at high temperature such as 1000 Degree C and the quality was accepted by many customer who is in area space industry, nuclear power industry.

Also OHMALLOY can supply the thermocouple alloy wire in cheap cost for making extension cable. OHMALLOY have a lot of advantage in reduing the cost while ensuring the quality of the extenison alloy wire as we had large quantity order for that.

Thermocouple type and alloy material:

Name and code of alloy wires

Diameter of wires (mm)

Maximum temperature ℃

Positive

Negative

Name

Code

Name

Code

Long-time

Short-time

NiCr10 (Chromel)

KP

NiSi3 /(Alumel)

(China standard)

KN

Φ0.3

700

800

Φ0.5

800

900

Φ0.8Φ1.0

900

1000

NiAl/(Alumel)

(IEC standard)

KN

Φ1.2Φ1.6

1000

1100

Φ2.0Φ2.5

1100

1200

NiCr14.2Si

NP

NiSi4

NN

Φ3.2

1200

1300

NiCr10 (Chromel)

EP

CuNi45 (Constantan)

EN

Φ0.3Φ0.5

350

450

Φ0.8Φ1.0Φ1.2

450

550

Φ1.6Φ2.0

550

650

Φ2.5

650

750

Φ3.2

750

900

Fe

JP

CuNi45 (Constantan)

JN

Φ0.3Φ0.5

300

400

Φ0.8Φ1.0Φ1.2

400

500

Φ1.6Φ2.0

500

600

Φ2.5Φ3.2

600

750

Cu

TP

CuNi45 (Constantan)

TN

Φ0.2Φ0.3

150

200

Φ0.5Φ0.8

200

250

Φ1.0Φ1.2

250

300

Φ1.6Φ2.0

300

350


Thermocouple wire electromotive force (EMF) Tolerance:

Thermocouple Type

Grade

Temperature range ℃

Electromotive force(EMF) Tolerance

IEC (EN)60584

ASTM E230

Type K & Type N

-40~1100

±1.5℃ or ±0.4%t

±1.1℃ or ±0.4%

-40~1300

±2.5℃ or ±0.75%t

±2.2℃ or ±0.75%

Type E

-40~1100

±1.5℃ or ±0.4%t

±1.0℃ or ±0.4%

-40~1300

±2.5℃ or ±0.75%t

±1.7℃ or ±0.5%

Type J

-40~750

±1.5℃ or ±0.4%t

±1.1℃ or ±0.4%

-40~750

±2.5℃ or ±0.75%t

±2.2℃ or ±0.75%

Type T

-40~350

±0.5℃ or ±0.4%t

±0.5℃ or ±0.4%

-40~350

±1.0℃ or ±0.75%t

±1.0℃ or ±0.75%


Stanrdard bare thermocouple wire electromotive force (EMF) values:



Temperature

Type K
ITS 90
DIN EN
60584

Type N
ITS 90
DIN EN
60584

Type E
ITS 90
DIN EN
60584

Type J
ITS 90
DIN EN
60584

Type T
ITS 90
DIN EN
60584

Type S
ITS 90
DIN EN
60584

Type R
ITS 90
DIN EN
60584

Type B
ITS 90
DIN EN
60584

Type U
IPTS 68
DIN
43710

Type L
IPTS 68
DIN
43710

Type L
GOST
492

0

0.000

0.000

0.000

0.000

0.000

0.000

0.000

0.000

0.000

0.000

0.000

100

4,096

2,774

6,319

5,269

4,279

646

647

33

4,250

5,370

6,950

200

8,138

5,913

13,421

10,779

9,288

1,441

1,469

178

9,200

10,950

14,660

300

12,209

9,341

21,036

16,327

14,862

2,323

2,401

431

14,900

16,590

22,990

400

16,397

12,974

28,946

21,848

20,872







500

20,644

16,748

37,005

27,393








600

24,905

20,613

45,093

33,102








700

29,129

24,527

53,112

39,132








800

33,275

28,455

61,017

45,494








900

37,326

32,371

68,787









1000

41,276

36,256

76,373









1100

45,119

49,987










1200

48,838

43,846










1300

52,410

47,513













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