Recommendation 5 of the 82nd CIPM (1993)
Thermodynamic temperature measurements
The Comité International des Poids et Mesures,
- the importance of accurate measurements of thermodynamic temperature, as emphasized in Recommendation T 1 (1987),
- the inconsistencies which still exist in determinations of thermodynamic temperature, especially in the regions near 150 K, 700 K and at higher temperatures,
- the desirability of extending the range of the International Temperature Scale of 1990 (ITS-90) below its present lower limit of 0,65 K,
- the importance of the national laboratories and the Bureau International des Poids et Mesures having a capability for thermodynamic temperature measurements using a variety of techniques,
recommends that national laboratories pursue fundamental research in thermometry, and in particular the measurement of thermodynamic temperature in the ranges referred to above.