Calibration : Temperature

Temperature Calibration

UKAS temperature calibration at Absolute Calibration is performed in a very well equipped Environmental Laboratory with a variety of fluid baths, a fluidised alumina bath and a high temperature furnace, all of which provide very stable isothermal environments for the temperature calibration of Platinum Resistance Thermometers and thermocouples using comparative techniques.

Low temperatures, down to -90°C are achieved using an AMETEK JOFRA Advanced Temperature Calibrator - ATC-125B.

The JOFRA ATC-125 ultra cooler features a unique free piston stirling cooler technology for optimum performance and superior temperature homogeneity throughout the block at very low temperatures. The JOFRA ATC-125 ultra cooler is the world's first temperature dry-block calibrator capable of reaching -90˚C.

Absolute Calibration have wide experience in the temperature calibration of Kaye Intelligent Probes (Intelligent Resistance Temperature Devices - IRTD's). We can also re-programme Kaye Intelligent Probes as part of their calibration.

We can provide UKAS temperature calibration and standard traceable temperature calibration and certification over the range:-

-90 °C to 1200 °C with uncertainties as low as 0.01 °C

As well as PRT's and Thermocouples we also provide UKAS temperature calibration of Dry block calibrators and standard traceable calibration of Infrared (blackbody) thermometers.

UKAS Temperature Uncertainties

Measured Quantity Calibration & Measurement Capability
Resistance Thermometers 
Triple point 0.01 °C 0.0030 °C
Ice Point 0.00 °C 0.0050 °C
-90 °C to -70 °C 0.1 °C
-70 °C to 250 °C  0.010 °C
250 °C to 450 °C 0.030 °C
450 °C to 650 °C 0.055 °C
Platinum Thermocouples
0 °C to 600° 1.0 °C
600 °C to 1100 °C 2.0 °C
1100 °C to 1200 °C 2.3 °C

For thermocouples and dry block calibrators/baths, please take the link below to view our full UKAS Calibration schedule.

Temperature Calibration - Ice Bath

Temperature Calibration Isotech Nixon Oil Bath


Back Link to UKAS Schedule 0078