Executive Summary :
Objective: I. To develop the Acoustic Gas Thermometry set-up as the Boltzmann constant (kB) based primary standard of Thermodynamic Temperature with in-house R&D efforts.
II. To optimize the fabrication of diamond turned quasi-spherical resonator, acoustic-microwave measurements, temperature monitoring, gas purity and pressure measurements to determine the Boltzmann Constant with the uncertainty better than 1 ppm.
III. To measure the thermodynamic temperature in the range from -38 oC to 30 oC ( TP of Hg to MP of Ga) by relative Acoustic Gas Thermometry (AGT) using high pure argon gas.
IV. To actively participate and provide the know-how in the BIPM/CIPM/SI mission of Boltzmann Constant, Thermodynamic temperature measurements (T) and T-T90 estimates to formulate the new international temperature scale of ITS-202X.
V. To serve the Indian R&D Establishments and Industry by providing the indigenously traceable primary thermometry when new kelvin is implemented from May 2019.