Jan 7 2004
The positive element of the type S thermocouple contains Platinum / Rhodium Thermocouple Alloy Pt90 / Rh10. Type S thermocouples are characterised by a high degree of chemical inertness and stability at high temperatures. Type S Thermocouples using Platinum / Rhodium Thermocouple Alloy Pt90 / Rh10. are commonly used as a standard for calibration of base metal thermocouples.
Key Properties
The key properties of Platinum / Rhodium Thermocouple Alloy Pt90 / Rh10 are tabulated below.
| . |
. |
| Electrical Properties |
|
| Temperature coefficient (K-1) |
0.0017 |
| Electrical resistivity (µOhm.cm) |
18.4-19.2 |
| Mechanical Properties |
|
| Elongation at break (%) |
<35 |
| Hardness - Brinell |
90-165 |
| Tensile strength (MPa) |
320-620 |
|
| Physical Properties |
|
| Density (g.cm-3) |
19.97 |
| Melting point (°C) |
1830-1855 |
| Thermal Properties |
|
| Thermal conductivity (W.m-1.K-1) |
38 @ 23 °C |
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