Time & Frequency and Electrical & Electronics Metrology Division

The main objective of this division is to strengthen and encourage the overall development in the field of science and technology for the country. The main responsibility is the realization, establishment, custody, maintenance, dissemination and upgradation of the national standards for Time & Frequency and Electrical & Electronics parameters.

The Time & Frequency Metrology Section is responsible for the highest level of time and frequency measurements in India using ultraprecise satellite links. In simple words, CSIR-NPL maintains the Indian Standard Time (IST ). The time keeping by NPL is based on a bank of Cesium (Cs) atomic clocks and a Hydrogen maser. These clocks are so accurate that they would lose or gain one second in about three lakh years. The traceability of our time scale with BIPM is at the level of few nano-seconds (ns). In addition, we carry out research and development on primary atomic clocks. Our first Cs fountain clock, with an accuracy of a few parts in 10-15 , became operational in 2011. A second Cs Fountain is under development (project NOVOCEF). Recently, we have started developing a more accurate clock (≈10-17 ) at optical wavelengths based on a single trapped Ytterbium ion (project STIOS).

The Division also maintains the primary standards like Josephson Voltage Standards and Quantum Hall Resistance Standards. A dedicated group is working for establishing the Device Fabrication and Characterization for Quantum Metrology.

The Division is also providing various apex level calibration services  in Time & Frequency, Electrical and Electronic parameters to the industry & user organizations of the country and provides educational training on industrial metrology to support the economic growth. The various Electrical & Electronic parameters are LF, HF Impedance and DC Metrology, LF, HF Voltage, Current & Microwave Metrology, AC High Voltage & Current Metrology and AC Power & Energy Metrology.


Contact

Scientist Incharge Dr. V. N. Ojha
  Chief Scientist & Head
  Time & Frequency and Electrical & Electronics Metrology Division
  Phone: +91-11-45608290 / 45608593
  E-mail:  vnojha@nplindia.org
   
Address : Head, Time & Frequency and Electrical & Electronics Metrology Division
  Room No. 126
  National Physical Laboratory
  Dr. K. S. Krishnan Marg
  New Delhi – 110012, INDIA.
Sub Division Head E-mail ID
Time and Frequency Metrology Section   Dr. V. N. Ojha vnojha@nplindia.org
LF, HF Impedance and DC Metrology Section   Mr. Thomas John tjohn@nplindia.org
LF, HF Voltage, Current & Microwave Metrology Section   Mr. P. S. Negi psnegi@nplindia.org
AC High Voltage & Current Metrology Section Mr. M. A. Ansari ansari@nplindia.org
AC Power & Energy Metrology Section   Mr. J. C. Biswas jcbiswas@nplindia.org
Quantum Current Metrology Section Dr. V. P. S. Awana awana@nplindia.org
Quantum Hall Resistance Metrology Section   Dr. H. K. Singh hks65@nplindia.org
Device Fabrication and Characterization Group for Quantum Metrology Section Dr. V. N. Ojha vnojha@nplindia.org

CONTACT INFORMATION