Mole introduced by CSIR-NPL

On 2019 World Meterology Day, the Council of Scientific and Industrial Research and National Physical Laboratory (CSIR-NPL) has recently introduced redefined International System of Units for the country. The redefined systems are Kilogram (SI unit of weight), Kelvin (SI unit of temperature), Mole (SI unit of amount of substance), and Ampere (SI unit of current). The purpose of a system of units is to enable world-wide coherence of measurements. CSIR- NPL has also sent the new definitions to the Ministry of Human Resource Development (MoHRD) for the engineering course syllabus and to National Council of Educational Research and Training for adoption in schools. It must be noted that the world’s scientific community adopted the resolution to redefine four of the 7 base units during the open session of the General Conference on Weights and Measures (CGPM) at BIPM in November 2018. Therefore, there is no change in the definition of three other SI units—second, metre and candela — which were defined based on natural constants.