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Type T Thermocouple - Technical Information

Type T - Copper vs Copper-Nickel, IEC 60584-1

Thermocouple Type T, whose original name was Copper-Constantan, has found quite a niche for itself in laboratory temperature measurement over the range -250°C to 400°C - although above this the copper arm rapidly oxidises. Repeatability is excellent in the range -200°C to 200°C (±0.1°C). Points to watch out for include the high thermal conductivity of the copper arm, and the fact that the copper/nickel alloy used in the negative arm is not the same as that in Type J - so they’re not interchangeable.

What is a Thermocouple?

Type T Thermocouples - Typical Constructions and Styles

Type T Mineral Insulated
Thermocouples Type T Thermocouples with Mineral Insulation

Rugged sensors, ideal for most applications. Vast choice of terminations e.g. pot seals, cables, connectors, heads etc.Type T Swaged Tip
Thermocouples Swaged Tip Type T Thermocouples

Fast response thermocouples ideal for industrial and other applications. Type T Miniature
Thermocouples Miniature Type T Thermocouples

Ideal for precision temperature measurements where minimal displacement and a fast response is required. Type T Heavy Duty
Thermocouples Heavy Duty Type T Thermocouples

For industrial applications such as furnaces, kilns, ovens, boliers, flues etc. Many types of sheath material available. General Purpose
Type T Thermocouples Type T Thermocouples for General Use

A wide range of thermocouples to suit many applications. Hand held, surface, bayonet, bolt, patch styles etc. ATEX/IECEx Approved
Type T Thermocouples ATEX approved Type T Thermocouples

A large range of thermocouples with a variety of terminations such as pot seal, terminal heads etc.

Type T - Technical Data

Conductor Combination		Approximate generated EMF change in µV per ºC change (referenced to 0ºC) at:			Approximate Working Temperature Range		Thermocouple Output Tolerances to IEC 60584-1
+ Leg	- Leg	100ºC	500ºC	1000ºC	Continuous	Short Term	Type	Class 1	Class 2	Class 3
COPPER	COPPER - NICKEL Also known as: Constantan, Advance™, Cupron™	46	–	–	–185 to +300°C	–250 to +400°C	Temperature Range Tolerance Value Temperature Range Tolerance Value	–40°C to +125°C ±0.5°C 125°C to 350°C ±0.004⋅ \|t\|	–40°C to +133°C ±1.0°C 133°C to 350°C ±0.0075 ⋅ \|t\|	–67°C to +40°C ±1.0°C –200°C to –67°C ±0.015⋅ \|t\|

1. The tolerance is expressed either as a deviation in degrees Celsius or as a function of the actual temperature.
2. Thermocouple materials are normally supplied to meet the tolerances specified in the table for temperatures above –40 deg C. These materials however, may not fall within the tolerances for low temperatures given under Class 3 for Types T, E and K thermocouples. If thermocouples are required to meet limits of Class 3, as well as those of Class 1 and/or Class 2, the purchaser should state this, as selection of materials is usually required.

Cable Colour Codes for T Type Thermocouples

ANSI MC96.1	IEC 60584-3	Redundant national colour coding for thermocouple cables
ANSI MC96.1	IEC 60584-3	BS 1843	DIN 43714	NFC 42324

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