Panellists of the Round Table

Dr. Jean-Rémy Filtz, graduated from the Pierre and Marie Curie University in Paris (Sorbonne University). With a background in physics and engineering sciences, specializing in heat transfer, he holds a PhD and has collaborated with researchers and industrial communities from around the world throughout his career. Starting out as a research engineer in radiometry and thermal metrology, he has actively participated, at the national and international levels, in promoting rational energy use for the benefit of major companies in the sector and within the framework of standardization bodies. During this period, he contributed to the development of the French accredited calibration chain in radiation thermometry and provided trainings in infrared thermography to industrials. In the early 2000s, he became a French member of the BIPM-CCT for thermal quantities, before chairing this working group since 2014. He also participated in parallel in the TC-T Euramet and in European projects within the framework of various research programs. In 2018, he became Director of Scientific and Industrial Metrology at LNE, also co-chairing the LNE-CNAM joint laboratory for several years. Retired since July 2025, he continues to actively participate in various scientific committees. He has published more than 80 papers/reports and he promoted the thermal metrology in many conferences around the world.

Dr. Miruna Dobre is Head of the Thermometry Laboratory at the Belgian National Metrology Institute (SMD). She served as Vice-Chair of EURAMET (2022–2025), leading strategic efforts in capacity building and digital transformation across Europe’s metrology community. Miruna contributes to research projects supporting the dissemination of the revised SI, ensuring national laboratories implement the new kelvin definition in practical calibration contexts. Her earlier work focused on the development and characterization of fixed-point cells—particularly the triple point of water and argon—and advanced uncertainty estimation methods, especially in cases with limited data and non-Gaussian distributions. Miruna is also deeply engaged in environmental metrology, contributing to projects which aim to improve the traceability and accuracy of climate-relevant measurements.

Dr. Jonathan Pearce leads the contact thermometry technical area of the Temperature & Humidity Group at the UK’s National Physical Laboratory. He is also Science Area Leader for the group. He has published nearly 200 articles on measurement issues. He specialises in physical modelling, including Multiphysics modelling and coupled thermal and CFD simulations. Research highlights include the development of new thermocouples and high temperature fixed points for contact thermometry, characterising uncertainty contributions of standard platinum resistance thermometry and fixed points used as temperature standards, introducing new techniques for overcoming calibration drift including self-validating sensors, low-drift thermometry, supporting the development of practical primary Johnson noise thermometry, and developing digital approaches to temperature metrology. He is the UK representative on the EURAMET Technical Committee for Thermometry (TC-T) and represents the UK in various BIPM Consultative Committee for Thermometry (CCT) and EURAMET TC-T working groups. He serves on various standards committees including those of BSI and IEC. He is a Fellow of the Institute of Physics, and an Honorary Professor at the University of Manchester.

Jan Nielsen is a Danish physicist and Senior Project Manager at the Danish Technological Institute (DTI) with over three decades of experience in metrology. Since 1992, he has held positions at national metrology institutes in both Denmark and the Netherlands, specializing in temperature and humidity measurement and calibration. Jan serves as Denmark’s representative in the EURAMET Technical Committee for Thermometry (TC-T).
A central focus of his work is advancing energy efficiency in industry and energy production by developing and introducing robust, SI-traceable measurement methods. Accordingly, a primary measurement standard for moisture in materials was established at DTI ten years ago, laying the foundation for more accurate and reliable moisture measurements, for example in solid biofuels. Through various European research initiatives, Jan has collaborated closely with colleagues, research organizations, and industry partners to improve measurement practices and foster innovation.

Dr. Stephanie Bell is a specialist in humidity measurement, standards and calibration, with more than 30 years’ experience in the metrology area. She has worked on humidity measurement techniques, primary humidity standards for various humidity quantities, trace moisture in gases, moisture content of materials, water vapour flux (skin water loss), water vapour pressure data and calculations, and uncertainty evaluation. Her work has addressed applications such as meteorology and climate, fuel cells, and hydrogen for vehicles.  Recent interests include research into accurate air temperature measurement, and the development of humidity calibrations in non-air gases and gas mixtures and at above-atmospheric pressures, especially for energy-related gases. Stephanie has chaired national and international committees on humidity, she leads NPL's humidity training course, and she has worked extensively as an assessor for laboratory accreditation in the UK and wider. She has worked on problem-solving consultancies and projects for various humidity applications and has a wide range of published papers, reports and guides on humidity and moisture, measurement uncertainty, and related subjects.

Prof. Stephen Sweeney is an expert in semiconductor physics and photonic device engineering, with over 25 years of experience spanning academia and industry. His research focuses on advanced semiconductor materials and the development of novel photonic technologies for applications in communications, sensing, energy, space and metrology. With colleagues at NPL (UK) he proposed the concept of active photonic thermometry. He is Professor of Photonics and Nanotechnology at the University of Glasgow, where he contributes to shaping the UK’s research landscape in compound semiconductors and infrared photonics. His other roles include CTO of ZiNIR Ltd, focusing on semiconductor technologies for communications and AI applications, and Visiting Professorships at the University of Surrey (UK), University of Wollongong (Australia), and the Ferdinand Braun Institute (Germany). He was previously Head of the Department of Physics at the University of Surrey, Lead Scientist at Marconi Optical Components, and held visiting researcher roles in the US, Germany, China and Japan. He served as President of the Physics and Astronomy section of the British Science Association, promoting public engagement with photonics. He is a Chartered Physicist, a Fellow of the Institute of Physics and a Fellow of SPIE, and currently serves as Editor of Springer-Nature Journal of Materials Science: Materials in Electronics.

Prof. Hartmann is an experienced Professor at Technical University of Applied Sciences Würzburg-Schweinfurt with a demonstrated history of working in the National Metrology Institute of Germany (PTB), in the higher education area at different universities and research institutes. He is skilled in Research and Development (R&D), Materials Science, Metrology, Physics and thermal metrology. He holds a Ph.D. in Physics from Free University of Berlin and a Habilitation focused in Optical Metrology from Technical University Berlin. Prof. Hartmann is also Executive and Scientific Director of the Center for Applied Energy Research (www.cae-zerocarbon.de).
References
ResearcherID/ Web of Science ResearcherID: C-3543-2015
Scopus AuthorID: 56265044000
ORCID: 0000‐0002‐9645‐5434
https://www.researchgate.net/profile/Juergen-Hartmann-3?ev=hdr_xprf
https://scholar.google.com/citations?user=ITQd5UsAAAAJ&hl=de