National Physical Laboratory

Time & Frequency Products & Services

The Time and Frequency group carries out a broad range of research into improved frequency standards, time scales and methods of disseminating time and frequency.
  1. As the UK's home of precise time and frequency measurement, NPL offers a range of services that provide access to a reliable and trusted source of time: the Time from NPL.
  2. Products and services offered by optical frequency metrology and standards.
  3. A resilient, traceable and certified time distribution service for the financial sector that completely eliminates reliance on GPS.
  4. Methods for comparing widely separated clocks and frequency standards are vital for the development of improved standards, generation of the international time scale and provision of services to UK industry. The NPL time scale UTC(NPL) is compared regularly with other national time scales using two independent techniques.


Please note that the information will not be divulged to third parties, or used without your permission