Platinum / Rhodium Thermocouple Alloy Pt90 / Rh10 - Supplier Data by Goodfellow

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.

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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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