Skip to content
About NPL
People
Science Fellows
Executive Team
Directors of NPL
Annual Review
Read Review Online
History
NPL's role
National Measurement Institute
Importance of Measurement
National Measurement System
Health, Safety + Environment
Corporate Social Responsibility
Quality
Worldwide Metrology
Products + Services
Technology Innovation Fund
Measurement Services
NPL Training
Consultancy
Knowledge Transfer
Technical R&D
Programme Management
Technology Exploitation
Calibration + Testing
News + Events
News
News Archive
Events
Training
Reference
Measurement Units
SI Base Units
SI Derived Units
Non-SI Units
SI Prefixes
SI Conventions
Proposed SI changes
FAQs
Useful Terms
Kaye & Laby Online
Publications
Annual Review
Uncertainty Guide
Newsletters
Guides
Reports + Papers
Posters
Publications Search
Sitemap
Careers
Current Vacancies
Case Studies
Graduate / Postgraduate Recruitment
Contact
Location
Staff / Expertise search
Free Advice from NPL
Measurement Network
National Physical Laboratory
Search for site
Science + Technology
Commercial Services
Educate + Explore
Measurement Network
Home
Home
Triple Point of Water Cell
Triple point of water cell - definition of the Kelvin.
