The international temperature scale of 1990 (ITS-90)

On 1st January 1990 the International Temperature Scale of 1990 (ITS-90) will come into force. This brief article describes the new scale and gives the differences between temperatures measured on ITS-90 and those measured on the current international scale, the International Practical Temperature Scale of 1968 (IPTS-68).

[1]  T. Quinn,et al.  Further Measurements of Thermodynamic Temperature Using a Total Radiation Thermometer: the Range - 130°C to +60°C , 1988 .

[2]  T. Quinn,et al.  A radiometric determination of the Stefan-Boltzmann constant and thermodynamic temperatures between -40 °C and +100 °C , 1985, Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences.

[3]  Rk,et al.  Temperature-Its Measurement and Control , 1941 .

[4]  P. Steur,et al.  Constant-Volume Gas Thermometry Between 4 K and 100 K , 1986 .

[5]  L. Besley,et al.  A Determination of Thermodynamic Temperatures and Measurements of the Second Virial Coefficient of 4He Between 13.81 K and 287 K Using a Constant-Volume Gas Thermometer , 1986 .

[6]  M. Moldover,et al.  Accurate acoustic thermometry. I: The triple point of gallium , 1988 .

[7]  J. Fischer,et al.  Determination of the Thermodynamic Temperatures of the Freezing Points of Silver and Gold by Near-Infrared Pyrometry , 1989 .

[8]  James F. Schooley,et al.  Temperature : its measurement and control in science and industry , 1992 .

[9]  D. Astrov,et al.  Precision Gas Thermometry between 2.5 K and 308 K , 1989 .

[10]  T. P. Jones,et al.  The Determination of the Thermodynamic Temperatures of Thermometry Fixed Points in the Range 660 °C to 1064 °C , 1988 .

[11]  R. Pelló,et al.  Determination of the Departure of the International Practical Temperature Scale of 1968 from Thermodynamic Temperature in the Region between 693 K and 904 K , 1988 .

[12]  H. Preston‐Thomas,et al.  The International Temperature Scale of 1990 (ITS-90) , 1990 .

[13]  R. E. Edsinger,et al.  Deviation of International Practical Temperatures from Thermodynamic Temperatures in the Temperature Range from 273.16 K to 730 K , 1976, Journal of research of the National Bureau of Standards. Section A, Physics and chemistry.

[14]  R. Edsinger,et al.  Differences between Thermodynamic Temperature and t (IPTS-68) in the Range 230°C to 660°C , 1989 .