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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

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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

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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

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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

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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

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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

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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.

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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.

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Thermocouple

Sensors

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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.

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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.

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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

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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

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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

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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

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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

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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

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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.

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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.

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Industries We Serve

Thermocouple Case Studies

Selecting A Wire - Thermometrics Corp

Selecting A Wire

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

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Tubeskin: 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. [...]

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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% [...]

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Selecting the Right 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 [...]

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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 [...]

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Thermocouple Case Studies

Selecting A Wire - Thermometrics Corp

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: 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

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

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email sales@thermometricscorp.com or call (818) 886-3755