Dr. Padipat Wongthep and Dr. Theerarak Chinarak, from NIMT, undertook a technical mission to Europe from 16–19 March 2026 to strengthen international collaboration in the field of high-pressure gas flow measurement.

During the visit, they held technical discussions and exchanged expertise with FORCE Technology in Denmark, as well as VSL and Euroloop in the Netherlands. The discussions focused on advancing measurement techniques and ensuring that ongoing work—particularly under the high-pressure gas flow project in collaboration with PTTLNG—aligns with international standards and best practices.

The mission provided valuable insights into advanced measurement systems and practices adopted in Europe, while also fostering opportunities for future cooperation between NIMT and its international counterparts. The knowledge gained is expected to contribute to improving the efficiency and accuracy of high-pressure gas flow measurement systems in Thailand.

Mr. Kornpatsitt Promasa, from NIMT, visited the Korea Research Institute of Standards and Science (KRISS), Republic of Korea, to conduct research on “Noise Figure Measurement” from 10–17 March 2026.

The primary objective of this visit was to collaborate with KRISS experts and enhance technical knowledge in noise measurement, RF systems, and advanced metrology techniques. During the research stay, Mr. Kornpatsitt engaged in discussions and experimental work with leading researchers, including Dr. Dong-Joon Lee, Dr. Tae Weon Kang, and Dr. Jae-Youg Kwon.

A key focus of the research was the development and application of electro-fiber optic probes for measuring electric and electromagnetic fields. Two types of probes were studied: the round-trip probe and the fabricated electro-optic (EO) sensor. These sensors are designed for high durability, capable of withstanding electric fields up to approximately 10 kW, and can operate over a wide frequency range. Their applications include measurements in TEM cells, near-to-far-field projections of horn antennas, and advanced antenna characterization systems.

In addition, Mr. Kornpatsitt studied the calibration and measurement of noise figure (NF), an essential parameter used to evaluate the performance of RF and electronic devices. The work involved the Y-factor method using calibrated noise sources to determine the Excess Noise Ratio (ENR) and noise temperature. Practical measurements were carried out on low noise amplifiers (LNAs), where both gain and noise figure were evaluated using KRISS standard systems.

The visit also provided exposure to advanced RF metrology infrastructure at KRISS, including:

– Microcalorimeter systems serving as primary standards for RF power measurements (10 MHz to 50 GHz),

– Comparison-based calibration systems for power sensors,

– D-band waveguide impedance standards for high-frequency applications (110–170 GHz),

– Robotic measurement systems for next-generation communication technologies, including millimeter-wave and sub-terahertz measurements.

Furthermore, innovative applications such as 5G antenna measurements (Sub-6 GHz), near-field imaging systems, and studies on human body blockage effects at sub-terahertz frequencies were explored.

This research visit significantly enhanced knowledge and technical capabilities in fiber optic sensing, noise measurement, RF power calibration, and advanced antenna measurement techniques. As a follow-up, NIMT plans to implement hybrid comparison methods for two-port amplifier measurements, focusing on gain and noise figure.

The collaboration between NIMT and KRISS continues to strengthen international cooperation in metrology and supports the advancement of measurement science for emerging communication technologies.

Mr. Anusorn Tonmueanwai, Deputy Director of NIMT, together with the metrologists of the Dimensional Metrology Department, warmly welcomed a delegation from Kyushu Institute of Technology (Kyutech) and King Mongkut’s University of Technology North Bangkok (KMUTNB) on 13 March 2026 at NIMT.

The visiting delegation was led by Emeritus Prof. Dr. Keiichi Kimura, Assoc. Prof. Dr. Panart Khajornrungruang, and Dr. Thitipat Permpatdechakul from Kyutech, along with Asst. Prof. Dr. Aran Blattler, Asst. Prof. Dr. Teppakorn Sittiwanchai, and Asst. Prof. Dr. Natthapon Bun-a-thuek from KMUTNB. The purpose of the visit was to bring Kyutech students to explore and gain first-hand experience in advanced dimensional metrology laboratories at NIMT.

During the visit, the students were introduced to NIMT’s capabilities in dimensional measurement, including primary standards for length, form, and surface metrology. The activity provided a valuable opportunity for academic exchange and helped strengthen collaboration between NIMT and partner universities in advancing metrology education and research.

Dr. Jariya Buajarern, Expert Metrologist, as Chair of CCL-TG-DIG, together with Dr. Narin Chanthawong, Group Leader of Nano Metrology from NIMT, represented Thailand at the 3rd Meeting of the Forum on Metrology and Digitalization (FORUM-MD) held from 9–13 March 2026 in France.

The meeting, hosted at the International Bureau of Weights and Measures (BIPM) headquarters in Sèvres, France, brought together leading representatives from national metrology institutes and international organizations to advance global collaboration in digital transformation within the field of metrology.

The FORUM-MD program comprised a series of technical sessions, including Working Group, Task Group, and Discussion Group meetings (9–10 March), followed by a specialized workshop on “AI in a metrology context: AI for metrology and metrology for AI” (11 March), and culminating in the plenary meeting held on 12–13 March 2026.

Key agenda items during the plenary meeting included updates from the International Committee for Weights and Measures (CIPM) and BIPM, progress on the BIPM Roadmap on Digitalization, reports from various working and task groups, and discussions on the governance and future direction of FORUM-MD.

In this important international forum, Dr. Narin Chanthawong was selected as the Chair of the FORUM-MD Task Group on Harmonizing DCC and DRMC. This appointment reflects international recognition of Thailand’s expertise and active role in advancing digital metrology.

The participation and leadership roles of NIMT experts in FORUM-MD not only strengthen Thailand’s presence in the global metrology community but also support the institute’s strategic direction toward digital transformation. The outcomes of this meeting will contribute to enhancing the development and harmonization of digital metrology systems, ensuring alignment with international standards and fostering innovation in measurement science.

Photo credit: © BIPM

Pol. Lt. Gen. Pornchai Suteerakune, Director of NIMT, together with Mr. Wirun Laopornpichayanuwat, Head of Mechanical Metrology Department, and NIMT team, warmly welcomed Engr. Ma. Nazarene M. Baculanta from the  National Metrology Laboratory of the Philippines, Industrial Technology Development Institute (ITDI), Department of Science and Technology on the occasion of her participation as an observer in a measurement comparison  on infusion pump analyzers conducted from 10 to 12 March 2026.

The visit encompassed in-depth technical discussions and practical observation of measurement procedures in a laboratory environment, including measurement traceability, uncertainty evaluation, and related technical practices under the guidance of NIMT experts. These activities constitute a critical component of bilateral comparisons with other National Metrology Institutes (NMIs), which are fundamental to establishing international equivalence and demonstrating technical competence.

NIMT is confident that this technical exchange will be mutually beneficial and further enhance alignment with internationally recognized best practices.

Mr. Likit Sainoo, Senior Professional Metrologist from NIMT, undertook an international mission to serve as a technical consultant in the field of pressure metrology from 8–12 March 2026 at the Bangladesh Standards and Testing Institution (BSTI), in collaboration with the British Standards Institution (BSI), to support the development of the National Metrology Laboratory (NML) of BSTI.

During the mission, Mr. Likit played a key role as a pressure expert in conducting a Pre-Peer Review and Technical Training Program for the Pressure Laboratory. The primary objective was to assess the laboratory’s readiness for international recognition, including evaluation of instrumentation and calibration systems, personnel competency, data analysis and uncertainty evaluation, reporting procedures, and laboratory environmental conditions.

In addition, he provided technical consultancy on pressure calibration in accordance with the internationally recognized DKD R6-1 guideline, covering the use of both pressure balances and pressure calibrators as reference standards. The program also included hands-on training sessions on calibration techniques for various instruments, such as digital pressure gauges, barometers, and electrical pressure gauges, as well as practical exercises on data processing, uncertainty estimation, and result analysis.

Furthermore, Mr. Likit facilitated a measurement comparison activity under the scheme NIMT.M.P-H2.6 for hydraulic gauge pressure in the range of 70 to 700 bar, contributing to strengthening measurement traceability and international comparability.

The engagement also included workshops and knowledge-sharing sessions with NML-BSTI staff across different technical areas, enhancing their practical skills and understanding of pressure calibration systems.

This mission has significantly contributed to strengthening the technical capabilities of BSTI, supporting its readiness for international peer evaluation and improving national calibration services. At the same time, it reinforces NIMT’s role in advancing regional and international cooperation in metrology, enhancing recognition among National Metrology Institutes (NMIs), and promoting sustainable development of measurement infrastructure.

Dr. Jeerasak Pitakarnnop, Senior Professional Metrologist from NIMT, represented Thailand in participating and delivering a technical presentation at the EURAMET Technical Committee for Mass and Related Quantities (TC-M) Workshop on Dynamic Measurements of Mechanical Quantities, held during 3–4 March 2026 in Sweden. He attended the workshop as an Invited Speaker, reflecting international recognition of his expertise in dynamic pressure metrology.

Dr. Jeerasak was nominated through the Asia Pacific Metrology Programme (APMP) TC-M, following EURAMET’s request for experts in the field of dynamic pressure. His selection highlights both his individual expertise and NIMT’s growing international role in advanced metrology research.

At the workshop, Dr. Jeerasak presented his work titled “Pressure Step and Shock Front Prediction Using CFD Simulations,” contributing to the session on dynamic pressure. His research focuses on the development of primary standards for dynamic pressure based on shock tube techniques, which have previously been presented at international platforms such as IMEKO and published in the journal Measurement. This work has been supported by national research funding and represents a significant advancement in Thailand’s metrology capabilities.

The shock tube-based system developed by NIMT serves not only as a primary standard for dynamic pressure but also has broader applications in emerging fields. These include studies on green, carbon-free fuels such as hydrogen and ammonia, as well as investigations into combustion processes, carbon emissions, and chemical reaction kinetics of hydrocarbon fuels. These applications align with global priorities on carbon reduction and sustainable energy development.

In addition to the workshop sessions, Dr. Jeerasak also participated in technical discussions and a laboratory visit under the RISE–NIMT bilateral collaboration framework, further enhancing cooperation between the two institutes.

Dr. Jeerasak’s role as an invited speaker not only showcases the technical capabilities of NIMT on the global stage but also contributes to strengthening Thailand’s position in advanced metrology. The outcomes of this participation are expected to support national development in key sectors such as energy, next-generation automotive technologies, carbon management policies, and the emerging space economy.

Overall, this engagement represents a significant step forward in advancing Thailand’s metrology infrastructure, fostering international collaboration, and supporting innovation-driven economic growth.

The National Institute of Metrology (Thailand) has reaffirmed its leadership in the international metrology community through its prominent role in the 6th International DCC Conference. Held under the theme “From Good Practice to Standardization: DCC for a Reliable Future,” the conference took place as an online event from February 24–26, 2026.

Dr. Jariya Buajarern, Expert Metrologist at NIMT, was honored to serve as the Chair of the International Programme Committee. She delivered the opening welcome address alongside distinguished global metrology leaders, including Dr. Frank Härtig, Vice President of PTB (Germany), and Dr. Stephan Schlamminger, Physicist from NIST (USA). The conference successfully brought together over 600 registered participants from 82 countries to shape the future of digital quality infrastructure.

Representing NIMT’s technical advancements, a research paper titled “Measurement Capability Modeling and SI-Compliant Unit Representation for Digital Calibration Certificates” was presented by Miss Praiya Thongluang, researcher of the digital transformation center of NIMT. This work details the enhancement of NIMT’s DCC Web Portal, which now supports advanced measurement capability modeling. A significant contribution of this architecture is the development of a CMC Database and a Scope of Accreditation Database. These databases provide a formal, machine-interpretable digital representation of laboratory capabilities, ensuring that generated DCCs are strictly aligned with authorized ranges and institutional trust levels.

Furthermore, NIMT’s framework ensures that unit representation adheres to the SI Digital Framework published by the BIPM. By treating SI prefixes, base units, and exponents as separate semantic components, the system achieves unambiguous and standardized unit encoding. This transition moves metrology from being document-centric to capability-driven, allowing calibration results to be fully machine-readable and interoperable across global data spaces.

The shift from traditional PDF certificates to Digital Calibration Certificates (DCC) is a critical enabler for Industry 4.0. By following FAIR principles (Findable, Accessible, Interoperable, Reusable), DCCs eliminate manual transcription errors, reduce processing times, and facilitate the automated exchange of trustworthy metrological data.

For more information regarding the conference outcomes and NIMT’s digital initiatives, please visit  https://www.youtube.com/watch?v=blWID7KORug&list=PLa_2XwPneZcrldsHrI0OA2onhDM64eY2W

The National Institute of Metrology (Thailand) (NIMT), led by its Director, Pol. Lt. Gen. Pornchai Suteerakune, was honored to welcome Prof. Dr. Cornelia Denz, President of the Physikalisch-Technische Bundesanstalt (PTB), together with Mr. Uwe Miesner, Head of Section Asia, on the occasion of their official visit to Thailand during 19–20 February 2026.

The visit aimed to reinforce bilateral cooperation and engage in high-level strategic discussions on advancing Thailand’s national metrology system, while further strengthening Thailand–Germany collaboration in response to the evolving global landscape.

For more than two decades, cooperation between NIMT and PTB has been close and continuous. PTB has played a pivotal role in laying the foundation of Thailand’s national metrology system, even prior to the official establishment of NIMT. The partnership has encompassed human resource development, knowledge and technology transfer, the development of national measurement standards, and enhancement of laboratory capabilities in accordance with international best practices.

These collaborative efforts have served as a key driving force in strengthening Thailand’s National Quality Infrastructure (NQI), thereby supporting industrial competitiveness, international trade and exports, consumer protection, and public safety.

During the visit, both sides exchanged views on the future direction of metrology development amid global challenges, including emerging technologies, energy transition, the digital economy, and the Sustainable Development Goals (SDGs). These transformations are generating increasingly complex and high-precision measurement requirements across multiple sectors.

Both parties agreed to expand cooperation into strategic priority areas such as clean energy, climate change, advanced technologies, and support for Thailand’s targeted industries. They also reaffirmed their shared commitment to elevating Thailand’s role as a regional hub for metrology cooperation within ASEAN and the Asia–Pacific region.

The National Institute of Metrology (Thailand) (NIMT) further advanced international cooperation in metrology by delivering a comprehensive technical training programme in Time and Frequency Metrology to the Uzbek National Institute of Metrology (UzNIM) from 9–20 February 2026 in Tashkent, Republic of Uzbekistan.

The two-week programme was conducted under the Physikalisch-Technische Bundesanstalt (PTB) project “Support for the Reform of the National Quality Infrastructure and Development of Services for the Uzbek Economy (Phase II)”, which aims to strengthen national measurement capabilities and quality infrastructure in Uzbekistan.

The training was delivered by Dr. Thayathip Thongtan, Senior Metrologist from NIMT, and focused on enhancing UzNIM’s technical knowledge and practical skills in time and frequency measurements, particularly in the calibration of period meters and frequency counters operating in period measurement mode.

The programme combined in-depth lectures and hands-on workshops covering:

– Fundamental principles of time and frequency metrology

– SI traceability to the second and linkage to UTC time scales

– Systems for period meter calibration

– Determination of period measurement errors

– Development of uncertainty budgets

– Drafting of calibration procedures for period measurements

UzNIM maintains the national time scale, UTC(UZ), and contributes to international time scales through participation in the framework of the International Bureau of Weights and Measures (BIPM). The training further strengthened SI traceability to the second and reinforced the linkage between national standards and international timekeeping systems.

During the mission, detailed discussions were held on measurement uncertainty evaluation, traceability statements, laboratory environmental controls, and the future expansion of period measurement services. UzNIM staff demonstrated strong technical commitment and presented a clear roadmap for extending period calibration services to wider ranges, with full traceability to the SI second and Coordinated Universal Time (UTC).

This technical cooperation served as an important platform for experience sharing between time and frequency experts of NIMT and UzNIM. It contributes directly to capacity building, harmonisation of measurement practices, and the sustainable development of national time and frequency calibration services in Uzbekistan.

The successful completion of the Time and Frequency metrology training marks a significant milestone in strengthening UzNIM’s technical capabilities in period measurement and calibration. It also reaffirms the strong collaborative partnership among NIMT, PTB, and UzNIM, laying a solid foundation for continued cooperation and future joint initiatives in the field of time and frequency metrology.