Article | Published:

International Practical Temperature Scale of 1968

Nature volume 222, pages 929931 (07 June 1969) | Download Citation



The new International Practical Temperature Scale of 1968 (IPTS-68) was approved by the Comité International des Poids et Mesures in 1968 and put into force by the National Physical Laboratory on January 1 this year. This revision of the IPTS-48 achieves the two objectives of making it agree with thermodynamic temperature values and of extending its range down to 13.81 K.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.


  1. 1.

    , and , Rev. Mod. Phys., 37, 537 (1965).

Download references

Author information


  1. Division of Quantum Metrology, National Physical Laboratory, Teddington, Middlesex

    • C. R. BARBER


  1. Search for C. R. BARBER in:

About this article

Publication history



Further reading


By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.