Standards of Weights and Measures Act, 1976
9. Base unit of
thermodynamic temperature. –
(1) The base
unit of thermodynamic temperature shall be the Kelvin.
(2) The “Kelvin” is
the fraction 1/273.16 of the thermodynamic temperature of the
triple point of water.
(3) The Kelvin shall
also be used for expressing the interval or difference of temperature.
(4) Zero degree
Celsius corresponds to 273.15 Kelvin.
(5) The degree Celsius
may also be used for expressing the interval or difference of temperature, unit
degree Celsius being equal to unit Kelvin. ]