Type S thermocouple wire
Type S bare thermocouple wire is a platinum-rhodium thermocouple wire consisting of a Pt10%Rh positive leg and a pure platinum negative leg. It is designed for high-temperature measurement in oxidising and inert atmospheres. Kamet supplies Type S wire in IEC 60584 Class 1 with a calibration certificate, with selected diameters available within 2–3 working days.
Type S, Pt10%Rh-Pt thermocouple is a thermocouple junction often used for extreme high temperatures. Type S, Pt10%Rh-Pt shares a lot of characteristics with type R, Pt13%Rh-Pt thermocouple, but type R has a higher Seebeck coefficient than type S. Temperature range of type S, Pt10%Rh-Pt thermocouple wire is 0°C to +1600°C.
The thermocouple type S is designed for continuous use in oxidising or inert atmospheres at temperatures up to 1600°C and can withstand brief periods up to 1700°C. Prolonged exposure to high temperatures can cause degradation of the thermocouple, including the possibility of rhodium diffusion into the pure platinum conductor, which results in a reduction in output. Therefore, it’s important to be aware of potential embrittlement caused by the environment.
Type S thermocouple wire specifications
| Specification | Type S bare thermocouple wire |
|---|---|
| Thermocouple type | Type S |
| Conductor combination | Pt10%Rh-Pt |
| Positive leg | SP – 90% Pt / 10% Rh |
| Negative leg | SN – 100% Pt |
| Stated temperature range | 0°C to +1600°C* |
| Short-duration temperature | Up to +1700°C |
| Standard tolerance | IEC 60584 Class 1 |
| Available diameters | -50°C to +1600°C |
| Certificate | Calibration certificate |
| Suitable atmospheres | Oxidising and inert |
| Key characteristics | High accuracy and stability |
| Availability | Selected diameters in 2–3 working days |
Our standard type S wire
Please contact us if you need different diameters. We can supply more custom made diameters (combinations) than stated below.
Need a complete Type S high-temperature thermocouple?
Type S wire can also be supplied as part of a complete high-temperature thermocouple assembly. View Kamet’s high-temperature thermocouple solutions for available configurations and customisation options.
| Thermocouple | Class | Outside Diameter in mm | Delivery time | |
|---|---|---|---|---|
| Type S | Class 1 | 0.045 mm | 3 weeks | Send inquiry |
| Type S | Class 1 | 0.20 mm | 3 weeks | Send inquiry |
| Type S | Class 1 | 0.30 mm | 2-3 days | Send inquiry |
| Type S | Class 1 | 0.35 mm | 3 weeks | Send inquiry |
| Type S | Class 1 | 0.40 mm | 3 weeks | Send inquiry |
| Type S | Class 1 | 0.50 mm | 2-3 days | Send inquiry |
| Type S | Class 1 | 0.80 mm | 3 weeks | Send inquiry |
Delivery times stated are workingsdays with delivery to Kamet’s warehouse
How can we help you today?
Request a quotation for the wire and quantity you need for your project.
Environment and industrial usage
Type S thermocouples are crucial in sectors where precision at high temperatures is essential. They play a significant role in aerospace (jet engine control), chemical (sensitive technologies), nuclear, glass (softening processes), steel, automotive (safety sensors), military, and electrical industries. Additionally, they are instrumental in temperature measurement for medical devices, as well as in science and research.
In practical applications, these thermocouples are used in the glass and semiconductor industries. They are also routinely used in the electric arc furnace process in the steel industry to accurately measure steel temperature before tapping.
Type S its high accuracy and stability also make it suitable for lower temperature applications.
The type S thermocouple wire can also be used in MI thermocouple cable. More about MI cable with type S thermocouple.
Specifications and physical properties
Operating temperature
Please note that these ranges are given as indicative values and vary per diameter.
- In oxidising or inert atmospheres: Up to 1450°C (2642°F)
- For long-term continuous use: Up to 1600°C (2912°F)
- Up to 1700°C (3092°F) for short durations.
What is Type S thermocouple wire made of?
Type S thermocouple wire consists of a platinum-rhodium positive leg (SP) containing 90% platinum and 10% rhodium, combined with a pure platinum negative leg (SN).
- SP ( + ) = 90%Pt 10%Rh
- SN (-) = 100%Pt
Physical properties
| SN | SP | |
|---|---|---|
| Density (g/cm3) | 21.45 | 20 |
| Melting point (°C) | 1771 | 1835 |
| Resistivity at 0 °C (μΩ*cm) | 9.81 | 18.1 |
| Tensile strength(Mpa) | 156.8 | 343 |
| Coefficient of heat conductivity(W/M*K) | 71 | 30 |
Other products in this category
Type K
NiCr-Ni bare wire -270°C to +1260°C
Type N
NiCrSil-NiSil bare wire -270°C to +1260°C
Type J
Fe-CuNi bare wire -210°C to +750°C
Type E
NiCr-CuNi bare wire -270°C to +900°C
Type T
Cu-CuNi bare wire -270°C to +370°C
Type R
Pt13%Rh-Pt bare wire -50°C to +1450°C
Type B
Pt30%Rh-Pt6%Rh bare wire 600°C to 1700°C