All Products

Thermocouple Types

Type J Thermocouple

TypeJColorCode


Temperature Range

32 to 1382°F (0 to 750°C)

Accuracy
Standard Limits: ± 2.2°C or ± 0.75% Tol.
Special Limits: ± 1.1°C or ± 0.4% Tol.

Type J thermocouples are suitable for use in vacuum, in oxidising and reducing atmospheres or inert gas atmospheres. They are used for temperature measurements 760°C and below.

Type J Thermocouple Chart F
Type J Thermocouple Chart C

Request A Quote or Call Us Now

Type K Thermocouple

Type K Color Code

Temperature Range
–328 to 2282°F (–200 to 1250°C)

Accuracy
Standard Limits: ± 2.2°C or ± 0.75% Tol.
Special Limits: ± 1.1°C or ± 0.4% Tol.

Type K Thermocouples are the most common calibration for providing the widest operating range. Recommended for continuous oxidizing or inert atmospheres. Most commonly used for temperatures above 538°C. Not suitable for sulfur environments.

Type K Thermocouple Chart F
Type K Thermocouple Chart C

Request A Quote or Call Us Now

Type T Thermocouple

Type T Color Code

Temperature Range
-454 to 700F(-270 to 370C)

Accuracy
Standard Limits: ± 2.2°C or ± 0.75% Tol.
Special Limits: ± 1.1°C or ± 0.4% Tol.

Suitable in oxidizing, reducing, or inert atmospheres as well as vaccuum. Moisture resistant and very stable. This type is best suited for low temperature service. Because of its stability at lower temperatures, this is a superior thermocouple for a wide variety of applications in low and cryogenic

Type T Thermocouple Chart F
Type T Thermocouple Chart C

Request A Quote or Call Us Now

Type N Thermocouple

Type N Color Code

Temperature Range
–454 to 2,300F (–270 to 1260C)

Accuracy
Standard Limits: ± 2.2°C or ± 0.75% Tol.
Special Limits: ± 1.1°C or ± 0.4% Tol.

Type N thermocouples are suitable for use in oxidising atmospheres, in inert gas atmospheres or dry reduction atmospheres. They are very accurate at high temperatures. The source voltage(EMF) and the temperature range are almost the same as with type K.

Type N Thermocouple Chart F
Type N Thermocouple Chart C

Request A Quote or Call Us Now

Type E Thermocouple

Type E Color Code

Temperature Range
-454 to 1600F(-270 to 870C)

Accuracy
Standard Limits: ± 2.2°C or ± 0.75% Tol.
Special Limits: ± 1.1°C or ± 0.4% Tol.

The Type E thermocouple is suitable for use in vacuum, inert, mildly oxidizing or reducing atmosphere. Not subject to corrosion at cryogenic temperatures. This thermocouple has the highest EMF output per degree of all the only used thermocouples.

Type E Thermocouple Chart F
Type E Thermocouple Chart C

Request A Quote or Call Us Now

Type B Thermocouple

Type B Color Code

Temperature Range
1475 to 3270°F (800 to 1800°C)

Accuracy
Standard Limits: ± 2.2°C or ± 0.75% Tol.
Special Limits: ± 1.1°C or ± 0.4% Tol.

Type B thermocouples are recommended for use in clean air at temperatures from 870 to 1700°C (1600 to 3100°F). They may be used for brief periods in vacuum, but should not be used in reducing atmospheres nor where exposed to nonmetallic or metallic vapors.

Type B Thermocouple Chart F
Type B Thermocouple Chart C

Request A Quote or Call Us Now

Type R Thermocouple

Type R Color Code

Temperature Range
-58 to 2700F (-50 to 1480C))

Accuracy
Standard Limits: ± 2.2°C or ± 0.75% Tol.
Special Limits: ± 1.1°C or ± 0.4% Tol.

Type R thermocouple has superior mechanical properties to Type S and is recommended for continuous use in oxidizing and inert atmospheres around temperatures up to 1400°C and intermittently up to 1600°C. Reducing atmospheres may cause excessive grain growth and drifts in calibration.

Request A Quote or Call Us Now

Type S Thermocouple

Type S Color Code

Temperature Range
-58 to 2700F (-50 to 1480C)

Accuracy
Standard Limits: ± 2.2°C or ± 0.75% Tol.
Special Limits: ± 1.1°C or ± 0.4% Tol.

Type S thermocouples are suitable for continuous use in oxidizing or inert atmospheres at temperatures up to 1600 °C. They can not be inserted in a metallic protection tube. Beware of embrittlement due to contamination.

Request A Quote or Call Us Now

Thermocouple

Sensors

Suggestions:

What is a Thermocouple?
THERMOCOUPLE-PLUG (3)

A thermocouple (T/C) is a closed-circuit thermoelectric temperature sensing device consisting of two wires of dissimilar metals joined at both ends of temperature measurements.

Fill out our thermocouple quote form and we'll get back to you asap.

Thermocouple

Products

THERMOCOUPLE-PLUG (3)

A thermocouple (T/C) is a closed-circuit thermoelectric temperature sensing device consisting of two wires of dissimilar metals joined at both ends of temperature measurements.

Suggestions:

Industries We Serve

Popular Thermocouples

Thermocouples for Extreme Application

Thermocouples for High Temperature

Type J Thermocouple

TypeJColorCode


Temperature Range

32 to 1382°F (0 to 750°C)

Accuracy
Standard Limits: ± 2.2°C or ± 0.75% Tol.
Special Limits: ± 1.1°C or ± 0.4% Tol.

Type J thermocouples are suitable for use in vacuum, in oxidising and reducing atmospheres or inert gas atmospheres. They are used for temperature measurements 760°C and below.

Type J Thermocouple Chart F
Type J Thermocouple Chart C

Request A Quote or Call Us Now

Type N Thermocouple

Type K Color Code

Temperature Range
–328 to 2282°F (–200 to 1250°C)

Accuracy
Standard Limits: ± 2.2°C or ± 0.75% Tol.
Special Limits: ± 1.1°C or ± 0.4% Tol.

Type K Thermocouples are the most common calibration for providing the widest operating range. Recommended for continuous oxidizing or inert atmospheres. Most commonly used for temperatures above 538°C. Not suitable for sulfur environments.

Type K Thermocouple Chart F
Type K Thermocouple Chart C

Request A Quote or Call Us Now

Type T Thermocouple

Type T Color Code

Temperature Range
-454 to 700F(-270 to 370C)

Accuracy
Standard Limits: ± 2.2°C or ± 0.75% Tol.
Special Limits: ± 1.1°C or ± 0.4% Tol.

Suitable in oxidizing, reducing, or inert atmospheres as well as vaccuum. Moisture resistant and very stable. This type is best suited for low temperature service. Because of its stability at lower temperatures, this is a superior thermocouple for a wide variety of applications in low and cryogenic

Type T Thermocouple Chart F
Type T Thermocouple Chart C

Request A Quote or Call Us Now

Type N Thermocouple

Type N Color Code

Temperature Range
–454 to 2,300F (–270 to 1260C)

Accuracy
Standard Limits: ± 2.2°C or ± 0.75% Tol.
Special Limits: ± 1.1°C or ± 0.4% Tol.

Type N thermocouples are suitable for use in oxidising atmospheres, in inert gas atmospheres or dry reduction atmospheres. They are very accurate at high temperatures. The source voltage(EMF) and the temperature range are almost the same as with type K.

Type N Thermocouple Chart F
Type N Thermocouple Chart C

Request A Quote or Call Us Now

Type E Thermocouple

Type E Color Code

Temperature Range
-454 to 1600F(-270 to 870C)

Accuracy
Standard Limits: ± 2.2°C or ± 0.75% Tol.
Special Limits: ± 1.1°C or ± 0.4% Tol.

The Type E thermocouple is suitable for use in vacuum, inert, mildly oxidizing or reducing atmosphere. Not subject to corrosion at cryogenic temperatures. This thermocouple has the highest EMF output per degree of all the only used thermocouples.

Type E Thermocouple Chart F
Type E Thermocouple Chart C

Request A Quote or Call Us Now

Type B Thermocouple

Type B Color Code

Temperature Range
1475 to 3270°F (800 to 1800°C)

Accuracy
Standard Limits: ± 2.2°C or ± 0.75% Tol.
Special Limits: ± 1.1°C or ± 0.4% Tol.

Type B thermocouples are recommended for use in clean air at temperatures from 870 to 1700°C (1600 to 3100°F). They may be used for brief periods in vacuum, but should not be used in reducing atmospheres nor where exposed to nonmetallic or metallic vapors.

Type B Thermocouple Chart F
Type B Thermocouple Chart C

Request A Quote or Call Us Now

Type R Thermocouple

Type R Color Code

Temperature Range
-58 to 2700F (-50 to 1480C))

Accuracy
Standard Limits: ± 2.2°C or ± 0.75% Tol.
Special Limits: ± 1.1°C or ± 0.4% Tol.

Type R thermocouple has superior mechanical properties to Type S and is recommended for continuous use in oxidizing and inert atmospheres around temperatures up to 1400°C and intermittently up to 1600°C. Reducing atmospheres may cause excessive grain growth and drifts in calibration.

Request A Quote or Call Us Now

Type S Thermocouple

Type S Color Code

Temperature Range
-58 to 2700F (-50 to 1480C)

Accuracy
Standard Limits: ± 2.2°C or ± 0.75% Tol.
Special Limits: ± 1.1°C or ± 0.4% Tol.

Type S thermocouples are suitable for continuous use in oxidizing or inert atmospheres at temperatures up to 1600 °C. They can not be inserted in a metallic protection tube. Beware of embrittlement due to contamination.

Request A Quote or Call Us Now

Industries We Serve

Thermocouple Technical Learning

Selecting A Wire

Selecting A Wire

GENERAL CONSIDERATIONS Vinyl offers low Cost, good flexibility, fair electricals, a good general purpose material. Irradiated PVC offers moderate cost, heat [...]

Read More
Tubeskin Thermocouple In Depth

Tubeskin Thermocouple In Depth

Thermometrics Corporation manufactures temperature sensors, radiant tubeskin thermocouples, petrochemical sensors and gasifer thermocouples for refining facilities around the world. [...]

Read More
Thermocouple Type K In Depth

Thermocouple Type K In Depth

TYPE K THERMOCOUPLE (Chromel / Alumel) 200°C to +1260°C / -328°F to +2300°F Chromel {90% nickel and 10% chromium} Alumel {95% [...]

Read More
Selecting the Right Temperature Sensor

Selecting The Right Temperature Sensor

Imagine that you are an Instrumentation Engineer. You are looking at the prints for a new plant, and you [...]

Read More
RTD vs. Thermocouple

RTD vs. Thermocouple

Selecting The Right Sensor: Imagine that you are an Instrumentation Engineer. You are looking at the prints for a new [...]

Read More

Thermocouple Technical Learning

Selecting A Wire

Selecting A Wire

GENERAL CONSIDERATIONS Vinyl offers low Cost, good flexibility, fair electricals, a good general purpose material. Irradiated PVC offers moderate cost, heat... read more

Tubeskin Thermocouple In Depth

Tubeskin Thermocouple In Depth

Thermometrics Corporation manufactures temperature sensors, radiant tubeskin thermocouples, petrochemical sensors and gasifer thermocouples for refining facilities around the world.... read more

Thermocouple Type K In Depth

Thermocouple Type K In Depth

TYPE K THERMOCOUPLE (Chromel / Alumel) 200°C to +1260°C / -328°F to +2300°F Chromel {90% nickel and 10% chromium} Alumel {95%... read more

Thermocouple Charts

Thermocouple Wire

Thermocouple Grade Wire

Calibration
Type
Temperature Range Tolerance Whichever is GREATER
J 32 to 1382°F 0 to 750°C ? 2.2°C or ? 0.75% ? 1.1°C or ? 0.4%
K 32 to 2282°F 0 to 1250°C ? 2.2°C or ? 0.75% ? 1.1°C or ? 0.4%
E 32 to 1652°F 0 to 900°C ? 1.7°C or ? 0.5% ? 1.0°C or ? o.4%
T 32 to 662°F 0 to 350°C ? 1.0°C or ? 0.75% ? 0.5°C or ? 0.4%
R or S 32 to 2642°F 0 to 1450°C ? 1.5° or ? 0.25% ? 0.6°C or ? 0.4%
B 1598 to 3092°F 870 to 1700°C ? 0.5%
N 32 to 2282°F 0 to 1250°C ? 2.2°C or ? 0.75% ? 1.1°C or ? 0.4%

Thermocouple Extension Grade Wire

Calibration
Type
Temperature Range Tolerance Whichever is GREATER
JX 32 to 392°F 0 to 200°C ? 2.2°C ? 1.1°C
KX 32 to 392°F 0 to 200°C ? 2.2°C ? 1.1°C
EX 32 to 392°F 0 to 200°C ? 1.7°C ? 1.0°C
TX 32 to 212°F 0 to 200°C ? 1.0°C ? 0.5°C
NX 32 to 392°F 0 to 200°C ? 2.2° ? 1.1°C
thermocouple_type_wire_gauge_temperature2

Thermocouple Reference Tables

Thermocouple Color Codes

thermocouple-color-code
thermocouple_tolerance
Thermocouple_Color_Code 2

Thermocouple Sheath Material

FEP Teflon Extruded– 204°C (400°F) / 260°C (500°F)
Conductor is FEP extruded Teflon. Overall jacket is FEP extruded Teflon. Abrasion resistance excellent. Moisture resistance is excellent. Color coded. Order Code TE/TE.

TFE Teflon Fused Tape– 260°C (500°F) / 316°C (600°F)
Conductor is TFE Teflon fused tape. Overall jacket is TFE Teflon fused tape. Abrasion resistance is good. Moisture resistance is excellent. Color coded. Order Code TF/TF.

TFE Teflon Tape– 482°C (900°F) / 538°C (1000°
Conductor is TFE Teflon tape, (not fused), with TFE coated glass. Overall jacket is Teflon coated glass braid. Abrasion resistance is good. Moisture resistance is excellent. Color coded. Order Code TFB/TFB.

Glass Braid– 482°C (900°F) / 538°C (1000°F)
Conductor is glass braid. Overall jacket is glass braid. No color coding. Abrasion resistance is fair. Moisture resistance is fair. Order Code FBN/FBN.

Glass Braid with Silicon Resin– 482°C (900°F) / 538°C (1000°)
Conductor Glass Braid with Silicone Resin Impregnation. Overall Jacket Glass Braid with Silicone Impregnation. Impregnation retained to 204°C (400°F). Abrasion Resistance Fair. Moisture Resistance Good. Color coded. Order Code FB/FB

Double Glass Braid– 482°C (900°F) / 538°C (1000°F)
Conductor Double Glass Braid with Silicone Resin Impregnation. Overall Jacket Glass Braid with Silicone Impregnation. Impregnation retained to 204°C (400°F) Abrasion Resistance Good. Moisture Resistance Good. Color coded. Order Code FB2/FB.

Double Glass Wrap– 482°C (900°F) / 538°C (1000°F)
Conductor is double glass wrap with high temperature varnish. Overall jacket of glass braid with silicone resin impregnation. Impregantion retained to 204°C (400°F). Abrasion resistance is fair. Moisture resistance is good. Color coded. Order Code FW2/FB.

High Temp Glass Braid– 704°C (1300°F) / 871°C (1600°F)
Conductor is hi-temp glass braid. Overall jacket of hi-temp glass braid with light laquer coating impregnation. Impregantion retained to 204°C (400°F). Abrasion resistance is fair. Moisture resistance is fair. Not color coded. Order Code HGN/HG .

Ceramic Fiber– 1204°C (2200°F) / 1427°C (2600°F)
Conductor is ceramic fiber. Overall jacket is ceramic fiber.Abrasion resistance is good. Moisture resistance is Fair. Not color coded. Order Code CF/CF.

PVC– -29°C (-20°F) / 105°C (221°F)
Conductor is PVC. Overall jacket is PVC. Abrasion resistance is good. Mositure resistance is excellent. Color coded.Order Code PC/PC.

Kapton Fused Tape– 316°C (600°F) / 427°C (800°F)
Conductor is kapton fused tape. No overall jacket. Wires are twisted. Both legs have a tracer. Abrasion resistance is good. Mositure resistance is excellent. Color coded. Order Code KF/TW.

Thermocouple Junctions

Grounded Thermocouples: This is the most common junction style. A thermocouple is grounded when both thermocouple wires and the sheath are all welded together to form one junction at the probe tip. Grounded thermocouples have a very good response time because the thermocouple is making direct contact with the sheath, allowing heat to transfer easily. A drawback of the grounded thermocouple is that the thermocouple is more susceptible to electrical interference. This is because the sheath often comes into contact with the surrounding area, providing a path for interference.

Ungrounded Thermocouples: A thermocouple is ungrounded when the thermocouple wires are welded together but they are insulated from the sheath. The wires are often separated by mineral insulation.

Exposed Thermocouples (or “bare wire thermocouples”): A thermocouple is exposed when the thermocouple wires are welded together and directly inserted into the process. The response time is very quick, but exposed thermocouple wires are more prone to corrosion and degradation. Unless your application requires exposed junctions, this style is not recommended.

Ungrounded Uncommon: An ungrounded uncommon thermocouple consists of a dual thermocouple that is insulated from the sheath and each of the elements are insulated from one other.

Thermocouple Order Process

Here are just a few things we're looking for so we can manufacture the right temperature sensing solutions for you.

  • null

    Type K

    Thermocouple

  • null

    Type J

    Thermocouple

  • null

    Type T

    Thermocouple

  • null

    100Ohm RTD

  • null

    500Ohm RTD

  • null

    1000Ohm RTD

  • null

    304 Stainless Steel

  • null

    316 Stainless Steel

  • null

    310 Stainless Steel

  • null

    321 Stainless Steel

  • null

    Iconel

    600, 601, 800

  • null

    Hasteloy

    C-276, C-4

  • null

    Single

    Thermocouple

  • null

    Dual

    Thermocouple

  • null

    Multipoint

    Thermocouple

  • null

    Single

    2-Wire RTD

  • null

    D2

    2-Wire RTD

  • null

    Single or Dual

    3/4-Wire RTD

  • null

    .063

  • null

    .125

  • null

    .188

  • null

    .250

  • null

    .375

  • null

    TC's

    .010, .020, .040

  • null

    Grounded

    Thermocouple

  • null

    Un Grounded

    Thermocouple

  • null

    Exposed

    Thermocouple

  • null

    Alpha

    RTD

  • null

    SS Overbraid

  • null

    Flex Armor

  • null

    Rubber Sleeve

  • null

    Any

    In Inches

  • null

    PVC

  • null

    Teflon

  • null

    Fiberglass

  • null

    Kapton

  • null

    Bear Wire

  • null

    Ring Lugs

  • null

    Jack

  • null

    Plug

  • null

    Terminals

  • null

    Any

    In Inches

  • null

    Hex Fittings

  • null

    Compression

  • null

    Fluid Seals

  • null

    Configuration

  • null

    Detail

  • null

    Concept

  • null

    Components