We realise and disseminate the UK National Standards for temperature (between approximately 4.2 K (-269 °C) and 3000 °C) and humidity (dew-point temperatures from -90 °C to +95 °C) the uncertainties of which are demonstrated through international comparisons. NPL is making world-leading contributions to the realisation of the redefined kelvin.
We have a growing portfolio of temperature, humidity and moisture calibration services. These UKAS-accredited services offer very low calibration uncertainties, wide measurement ranges and flexibility in the operating parameters used. We use the International Temperature Scale of 1990 (ITS-90) which defines procedures for realising temperature in kelvin and degrees Celsius. All quoted uncertainties are expanded uncertainties, based on a standard uncertainty multiplied by a coverage factor k = 2, providing a coverage probability of approximately 95 %.
We have leading expertise and novel techniques for solving real-world temperature and humidity measurement problems, including those in challenging or harsh environments. We provide cost-effective, impartial, quality-assured solutions to organisations looking to understand the impact of temperature and humidity measurement on their infrastructure, products, research and development. This is not limited to a particular sector or technology, but is both wide (from construction to space) and deep (from practical applications to theoretical knowledge and modelling).
We engage with users in a variety of ways, including long-term research, industrial partnerships, consultancies, calibration services, instrument sale and installation, good practice guides and tailored training.
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