Moisture and temperature

SP brings together research and innovation in the field of temperature measurement, with the underlying objective of developing working methods, reducing uncertainty of measurement, and enhancing skills and knowledge in order to enable industry to improve its temperature measurements.
Thermodynamic traceability

In the field of thermodynamic traceability we are investigating the feasibility of establishing direct traceability for cryoradiometers and electrical quantities for our reference pyrometer, over a range from 1000 °C to 2000 °C. 

At present, we have access to a fixed point for gold at 1064 °C, with comparisons against strip lamps for higher temperatures, which limits the uncertainty of measurement. 

Inhomogeneity in thermocouples

Inhomogeneity in thermocouples is another area that we regard as important in an industrial perspective.  This phenomenon directly causes measurement errors in many applications that are sufficiently large to create real problems.  This is very clearly demonstrated by the very different measurement results often produced by a practical measurement in comparison with a calibration measurement. 

We have previously developed a methodology for measurement of inhomogeneities, which is now being refined to make it more suitable for industrial thermocouples. 

Thermal capacitivity

Questions have arisen in recent years concerning the determination of specific thermal capacitivity of very different materials, for which existing methods used by SP are unsuitable.  The reasons can be such as inhomogeneities in the material, air inclusions, the size of test pieces, structure etc.  A calorimetric method can generally be used, but commercial instruments are available only for very small samples.  

We have developed a temperature sweep method that has so far been demonstrated to work from 5 °C to 60 °C, based on the known thermal capacitivity of water as a function of temperature.  Calorimeters have been constructed in several sizes in order to meet the requirements of a range of sizes of samples. 

SP Temperature Centre

SP gathers its temperature measurement and modelling resources and technical expertise in a single Temperature Centre.Read more...

Temperature

We calibrate your temperature-measuring instruments so that you can trust the results.Read more...

Related Information

Research

Measurement of process and production applications Metrological research

Contact Persons

Sara Ljungblad

Phone: +46 10 516 53 70

Magnus Holmsten

Phone: +46 10 516 56 82

RISE Research Institutes of Sweden, Phone 010-516 50 00, E-mail info@ri.se

The RISE institutes SP, Innventia and Swedish ICT have merged in order to become a stronger research and innovation partner for businesses and society.
During 2017 sp.se will be one of several websites within RISE. Please visit ri.se for more information about RISE.

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