NPL's Temperature & Humidity Group has world-leading expertise and facilities aimed at improving the practical measurement of temperature and humidity. We help establish and maintain the International Temperature Scale of 1990, ITS-90. We support industrial measurements through a wide range of activities including long-term research, industrial partnerships, consultancies, good practice advice, and training. We supply a range of sensors and standards, and we offer calibrations against UK National Standards that are validated through international comparisons.
We provide cost-effective, impartial, quality-assured solutions: from everyday measurements to those at the extremes of sensing technology, such as temperatures above 2000 °C, or humidity at pressure in a range of gases. We work with a variety of sectors including aerospace, manufacturing, space, medical and academia. Our development of ultra-stable thermocouples combined with the world's first UKAS-accredited calibration of high-temperature metal-carbon eutectic fixed-point standards has brought about a step change in the uncertainties and reliabilities achievable.
- Graham Machin has been awarded the Doctor of Science (DSc) degree for 'improvements in temperature measurement'.
- New study published in the journal Science is the first to estimate global surface temperatures using the ISTI databank.
- Nature podcast covers the Royal Society meeting, 'Towards implementing the new kelvin', organised and led by Graham Machin.
- On 18-19 May 2015, about 50 leading researchers in thermometry from around the world gathered at the Royal Society International Centre to discuss progress towards implementing the new kelvin ahead of the SI redefinition in 2018.
- Presentations from an event held on 9 Dec 2015 on several subjects related to air temperature, covering measurement techniques, calibration, uncertainty evaluation, and applications of air temperature measurement.
- A special edition of Measurement and Control, guest-edited by Graham Machin, describes the proposed changes to the SI.
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