Jan 7 2004
Type R thermocouples are made of Platinum / Rhodium Thermocouple Alloy Pt87 / Rh13 and are used when chemical inertness and stability at high temperatures, up to 1750°C, are required.
Key Properties
The key properties of Platinum / Rhodium Thermocouple Alloy Pt87 / Rh13 are tabulated below.
Table 1. Key properties
| Electrical Properties |
| Temperature coefficient ( K-1 ) |
0.0016 |
| Electrical resistivity ( µOhm.cm ) |
19.0 |
| Mechanical Properties |
| Elongation at break ( % ) |
<32 |
| Tensile strength ( MPa ) |
330-580 |
| Physical Properties |
| Density ( g.cm-3 ) |
19.64 |
| Melting point ( °C ) |
1840-1865 |
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