Type R thermocouple wire
Type R bare thermocouple wire is a platinum-rhodium thermocouple wire consisting of a Pt13%Rh positive leg and a pure platinum negative leg. It is designed for high-temperature measurement and can be used in oxidising and inert atmospheres. Kamet supplies Type R wire in IEC 60584 Class 1 with a calibration certificate.
Type R thermocouple wire specifications
| Specification | Type R bare thermocouple wire |
|---|---|
| Thermocouple type | Type R |
| Conductor combination | Pt13%Rh-Pt |
| Positive leg | RP – 87% Pt / 13% Rh |
| Negative leg | RN – 100% Pt |
| Long-term temperature | Up to 1300°C |
| Short-term temperature | Up to 1600°C |
| Standard tolerance | IEC 60584 Class 1 |
| Available diameters | 0.045 vs 0.10–1.0 mm |
| Certificate | Calibration certificate |
| Suitable atmospheres | Oxidising and inert |
| Key consideration | Sensitive to contamination |
| Delivery time | 3 weeks for listed diameters |
Our standard type R wire
Please contact us if you need different diameters. We can supply more custom made diameters (combinations) than stated below.
Need a complete Type R high-temperature thermocouple?
Type R wire can also be supplied as part of a complete high-temperature thermocouple assembly. View Kamet’s high-temperature thermocouples solutions for available configurations and customisation options.
| Thermocouple | Class | Outside Diameter in mm | Delivery time | |
|---|---|---|---|---|
| Type R | Class 1 | 0.045 mm | 3 weeks | Send inquiry |
| Type R | Class 1 | 0.20 mm | 3 weeks | Send inquiry |
| Type R | Class 1 | 0.30 mm | 3 weeks | Send inquiry |
| Type R | Class 1 | 0.35 mm | 3 weeks | Send inquiry |
| Type R | Class 1 | 0.40 mm | 3 weeks | Send inquiry |
| Type R | Class 1 | 0.50 mm | 3 weeks | Send inquiry |
| Type R | Class 1 | 0.80 mm | 3 weeks | Send inquiry |
Delivery times stated are workingsdays with delivery to Kamet’s warehouse
Environmental and industrial usage
These thermocouples are essential in sectors where high-temperature accuracy is crucial. Key industries include aerospace for jet engine control, chemical industries for sensitive technologies, nuclear energy, glass manufacturing for softening processes, pyrometallurgy, automotive industry for safety sensors, military, and various electrical applications.
Furthermore, they are well-suited for vacuum furnaces and recommended for use in oxidising atmospheres but are prone to contamination, thus requiring protective measures.
These thermocouples are also extensively used in the medical field, as well as in scientific and research equipment, for precise temperature measurement across a range of devices.
The type R thermocouple wire can also be used in MI thermocouple cable. More about MI cable with type R thermocouple.
Specifications and physical properties
Operating temperature
Please note that these ranges are given as indicative values and vary per diameter.
- Maximum long term continuous operating temperature: up to 1300°C
- Short term use: up to 1600°C
What is Type R thermocouple wire made of?
Type R thermocouple wire consists of a platinum-rhodium positive leg (RP) containing 87% platinum and 13% rhodium, combined with a pure platinum negative leg (RN).
- RP ( + ) = 87% Pt 13% Rh
- RN (-) = 100% Pt
Physical properties
| RN | RP | |
|---|---|---|
| Density (g/cm3) | 21.45 | 19.6 |
| Melting point (°C) | 1771 | 1865 |
| Resistivity at 0 °C (μΩ*cm) | 9.81 | 19 |
| Tensile strength(Mpa) | 156.8 | 343 |
| Coefficient of heat conductivity(W/M*K) | 71 | 30 |
How can we help you today?
Request a quotation for the wire and quantity you need for your project.
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