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The Standard Platinum Resistance Thermometer Calibration Laboratory (SPRTL) realizes the ITS-90 using fixed-point cells from the Ar TP (–189.3442 °C) to the Ag FP (961.78 °). Calibration and certification services are provided for the following ITS-90 defining artifacts:
Additional specialized services (e.g. proficiency-test artifacts, bridge certification) can be found on the Special Tests for Thermometry webpage.
The Low Temperature Calibration Facility (LTCF) Cryogenic Thermometer Calibration Laboratory calibrates thermometers from 0.5 K to 165 K. Information for these calibrations are found on the Cryogenic Thermometer Calibration Laboratory webpage.
How to Arrange a Calibration
For contact information, shipping address, or cost of calibration, see Resistance Thermometry.
Calibration Measurement Uncertainties
ITS-90 Fixed-Point Cells
† The ITS-90 temperature subrange uncertainties include the propagated fixed-point uncertainties and the contribution from non-uniqueness types I and III.