The division constitutes of Physical, Mechanical, Electrical & Electronics, Optical and Thermal measurement activities involving twelve groups. The division is responsible to establish, maintain and continually upgrade the National Standards of measurements. Provides the apex level Internationally Accepted calibration services to the industry and institutions of the country and thus ensures the traceability to measurements made by these parameters. India is the member of Meter convention since 1957 and out of 12 Consultative committees, India is the full member in three Consultative committees namely, CCEM, CCM and CCTF and Observer in two committees namely, CCQM and CCRI(II) http://www.bipm.org/en/convention/member_states/in/ The division has 234 Calibration and Measurement Capabilities (CMCs) http://www.bipm.org/utils/common/pdf/KCDB_CMCs.pdf and participated most of the 136 k ey and supplementary comparisons http://kcdb.bipm.org/appendixB/KCDB_ApB_search_result.asp?search=1&met_idy=0&bra_idy=0&cmt_idy=0&ett_idy_org=0&epo_idy=0&cou_cod=IN which participated by India as on 1 st August, 2011 in the key comparison data base (KCDB) of bipm.org web site. The groups are: