Grade datasheet · Type T
Type T Thermocouple Wire
Copper positive, constantan negative. The most stable of the base-metal types at low temperature, and the usual choice for cryogenic work, cold-chain and laboratory measurement below ambient.
0.018–6.00Diameter, mm
1 kgMinimum order
3–7 dLead time
MTCWith every lot
Identification
What this grade is called elsewhere
| System | Designation |
|---|---|
| IEC | Type T (IEC 60584-1) |
| Positive leg | Copper / TP |
| Negative leg | Constantan / Cu55Ni45 / TN |
| ASTM | E230 |
| GB | T 型热电偶丝 |
Grade equivalence is indicative. Confirm against the standard your drawing cites; our quotation states the designation we will produce to.
Composition
Nominal chemistry, % by weight
| Element | Nominal / limit |
|---|---|
| TP — Cu | ≈ 99.9 |
| TN — Ni | ≈ 45 |
| TN — Cu | Balance |
Properties
What the numbers are, and where they stop
| Property | Value |
|---|---|
| EMF at 100 °C | ≈ 4.28 mV |
| EMF at 200 °C | ≈ 9.29 mV |
| EMF at 400 °C | ≈ 20.87 mV |
| Useful range | −200 to 400 °C |
| Tolerance class | Class 1 or Class 2 |
Nominal values for selection only. Contractual composition, tolerance and mechanical properties are stated on the inspection report issued with each shipment.
Use
Where this grade earns its place
- Cryogenic and low-temperature measurement
- Cold chain and refrigeration
- Laboratory and calibration
- Medical and analytical instruments
Family: Thermocouple Wire
Questions we get asked
Why type T for low temperature?
Copper and constantan both behave predictably below ambient, and type T has the lowest drift of the common base-metal types in that range.
What is the practical upper limit?
Around 400 °C. Above that the copper leg oxidises and the calibration moves.
Send the specification — diameter, grade, temper, quantity.
We come back with a confirmed lead time and the documentation we can issue for the shipment. 100 g sample at cost; orders from 1 kg.
Request a quotation Order a 100 g sample