The unit of temperature Kelvin (K) is realized in the laboratory using a set of water triple point cells. The International Temperature Scale of 1990 (ITS-90) is realized using a set of fixed point cells covering the range of -189.3442 ºC to 1084.620 ºC.
The following calibrations can be realized in the laboratory:
- fixed point calibrations of standard platinum resistance thermometers and high temperature standard platinum resistance thermometers
- fixed point calibrations and comparison calibrations of noble metal thermocouples
- comparison calibrations of resistance thermometers, liquid in glass thermometers and thermocouples
The comparison calibrations cover the range of -80 ºC to 1200 ºC, depending on the type of the thermometer to be calibrated.