Standard Reference Material 1749 (Classic Reprint): Au/Pt Thermocouple Thermometer: Au/PT Thermocouple Thermometer (Classic Reprint) - Softcover

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Precision you can trust for high‑temperature work This standard reference material provides a lot of 18 gold versus platinum thermocouple thermometers, each calibrated on ITS-90 and supplied with wires and a protective sheath. It is the most accurate thermocouple available from 0 °C to 1000 °C, with very low calibration uncertainty.

This guide describes how the SRM 1749 thermocouples are fabricated and calibrated, and how to maintain and use them to achieve reliable measurements. It also includes practical methods for using the emf data to compare or calibrate other thermometers.

• How the thermocouples are constructed and calibrated on ITS-90.


• Uncertainty values and how they affect measurements up to 1000 °C.


• Maintenance steps to preserve accuracy and stability over time.


• Procedures for emf measurements, ice‑bath preparation, and reference junction handling.

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