Range: 0 °C to 1000 °C
Gold-platinum (Au/Pt) thermocouples are also used in place of standard platinum resistance thermometers (SPRTs) in some instances where the lower cost and insensitivity to mechanical knocks are of importance.
NPL’s Au/Pt thermocouple calibration service is UKAS (ISO 17025) accredited and is typically achieved by measuring a customer thermocouple at three ITS-90 reference temperatures. The results are then used to create an equation to describe the thermocouple voltage (emf) versus ITS-90 temperature. The resulting calibration equation applies over the whole temperature range of interest, and a formal certificate is provided.
The calibration uncertainty can be as low as ±0.05 °C over the full range of 0 °C to 1000 °C.
ITS-90 fixed points
These are the reference temperature artefacts, as specified in the ITS-90, for the practical realisation of the temperature scale. At NPL, the Zn (420 °C), Al (660 °C)and Ag (962 °C) fixed points are used for UKAS accredited thermocouple calibrations.
Don’t see what you are looking for? Our diverse skill set enables us to provide bespoke solutions. Please contact us to discuss your requirements.
Our research and measurement solutions support innovation and product development. We work with companies to deliver business advantage and commercial success. Contact our Customer Services team on +44 20 8943 7070