S
Type S — Pt-10%Rh / Pt Thermocouple
Platinum-10% Rhodium / Pure Platinum. Historical reference standard for the gold point (1064.18°C) per ITS-90. Used extensively in aerospace, glass, and primary calibration laboratories. Identical color codes to Type R — verify by alloy stamp.
ASTM E1751Noble Metal
At-a-Glance Specifications
1480°C
±1.5°C or ±0.25%
±0.6°C or ±0.1%
ASTM E1751
EMF Reference Values — Type S (ASTM E1751)
Selected EMF values in millivolts referenced to 0°C. Full tables available on the EMF Tables page.
Key EMF Values
0°C=0.000, 200°C=1.441, 400°C=3.259, 600°C=5.239, 800°C=7.345, 1000°C=9.587, 1200°C=11.951, 1480°C=15.582 mV
Limits of Error — ASTM E1751 / IEC 60584-2
| Class | Range | Limit of Error |
|---|---|---|
| Standard | 0 to +1480°C | ±1.5°C or ±0.25% (whichever greater) |
| Special | 0 to +1480°C | ±0.6°C or ±0.1% (whichever greater) |
ASTM E1751 — Applicable Standard
All specifications, EMF-temperature tables, and tolerance limits for Type S are defined under ASTM E1751. Consult the current edition of this standard for complete reference function coefficients and limits of error across all temperature sub-ranges.