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Thermocouple bare 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.

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

OHMALLOY can also supply the thermocouple alloy wire in cheap cost for making extension cable. OHMALLOY have a lot of advantage in reducing the cost while ensuring the quality of the extension 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


Φ0.8 Φ1.0

900

1000


NiAl/(Alumel)

(IEC standard)

KN


Φ1.2 Φ1.6

1000

1100


Φ2.0 Φ2.5

1100

1200


NiCr14.2Si

NP

NiSi4

NN

Φ3.2

1200

1300


NiCr10 (Chromel)

EP

CuNi45 (Constantan)

EN

Φ0.3 Φ0.5

350

450


Φ0.8 Φ1.0 Φ1.2

450

550


Φ1.6 Φ2.0

550

650


Φ2.5

650

750


Φ3.2

750

900


Fe

JP

CuNi45 (Constantan)

JN

Φ0.3 Φ0.5

300

400


Φ0.8 Φ1.0 Φ1.2

400

500


Φ1.6 Φ2.0

500

600


Φ2.5 Φ3.2

600

750


Cu

TP

CuNi45 (Constantan)

TN

Φ0.2 Φ0.3

150

200


Φ0.5 Φ0.8

200

250


Φ1.0 Φ1.2

250

300


Φ1.6 Φ2.0

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

-401100

±1.5 or ±0.4%t

±1.1 or ±0.4%

-401300

±2.5 or ±0.75%t

±2.2 or ±0.75%

Type E

-401100

±1.5 or ±0.4%t

±1.0 or ±0.4%

-401300

±2.5 or ±0.75%t

±1.7 or ±0.5%

Type J

-40750

±1.5 or ±0.4%t

±1.1 or ±0.4%

-40750

±2.5 or ±0.75%t

±2.2 or ±0.75%

Type T

-40350

±0.5 or ±0.4%t

±0.5 or ±0.4%

-40350

±1.0 or ±0.75%t

±1.0 or ±0.75%



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.

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

OHMALLOY can also supply the thermocouple alloy wire in cheap cost for making extension cable. OHMALLOY have a lot of advantage in reducing the cost while ensuring the quality of the extension 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


Φ0.8 Φ1.0

900

1000


NiAl/(Alumel)

(IEC standard)

KN


Φ1.2 Φ1.6

1000

1100


Φ2.0 Φ2.5

1100

1200


NiCr14.2Si

NP

NiSi4

NN

Φ3.2

1200

1300


NiCr10 (Chromel)

EP

CuNi45 (Constantan)

EN

Φ0.3 Φ0.5

350

450


Φ0.8 Φ1.0 Φ1.2

450

550


Φ1.6 Φ2.0

550

650


Φ2.5

650

750


Φ3.2

750

900


Fe

JP

CuNi45 (Constantan)

JN

Φ0.3 Φ0.5

300

400


Φ0.8 Φ1.0 Φ1.2

400

500


Φ1.6 Φ2.0

500

600


Φ2.5 Φ3.2

600

750


Cu

TP

CuNi45 (Constantan)

TN

Φ0.2 Φ0.3

150

200


Φ0.5 Φ0.8

200

250


Φ1.0 Φ1.2

250

300


Φ1.6 Φ2.0

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

-401100

±1.5 or ±0.4%t

±1.1 or ±0.4%

-401300

±2.5 or ±0.75%t

±2.2 or ±0.75%

Type E

-401100

±1.5 or ±0.4%t

±1.0 or ±0.4%

-401300

±2.5 or ±0.75%t

±1.7 or ±0.5%

Type J

-40750

±1.5 or ±0.4%t

±1.1 or ±0.4%

-40750

±2.5 or ±0.75%t

±2.2 or ±0.75%

Type T

-40350

±0.5 or ±0.4%t

±0.5 or ±0.4%

-40350

±1.0 or ±0.75%t

±1.0 or ±0.75%