Description
eXacal precision thermometers are used for precise temperature measurements or as calibration standards.
Temperature range: -100 °C to 420 °C
small measurement uncertainties: 6 mK to 21 mK
robust alternative to ITS-90 Standard Platinum Resistance Thermometers (SPRTs)
high stability and good calibration capability
Small measurement uncertainties with DAkkS calibration certificate
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DAkkS calibration at temperature fixed points
Medium-temperature precision thermometers can be calibrated in our own DAkkS calibration laboratory. DAkkS accreditation ensures that all calibrations are traceable to national and international standards.
The medium-temperature precision thermometers have been designed for excellent calibration at temperature fixed points. The measurement uncertainty is calculated from many components. The largest contributions to the measurement uncertainty budget are the reproducibility of the thermometer, ITS-90 deviation function, self-heating, and hysteresis of the temperature sensor. Using the parameters from the calibration certificate, the medium-temperature precision thermometer can be used with the respective deviation function in the temperature range from -38 °C to 420 °C.
Measurement uncertainty
small measurement uncertainties with DAkkS calibration certificate
Temperature fixed points from mercury triple point -38.8344 °C to zinc freezing point 419.527 °C
| Range | Temperature fixed point | Measurement uncertainty |
|---|---|---|
| -38.8344 °C – 0.01 °C | Mercury to water | 6 mK |
| 0.01 °C – 29.7646 °C | Water to gallium | 6 mK |
| 0.01 °C – 156.5985 °C | Water to indium | 10 mK |
| 0.01 °C – 231.928 °C | Water to tin | 11 mK |
| 0.01 °C – 419.527 °C | Water to zinc | 21 mK |
