Department of Metrology

Head of department dr. Evaldas Naujalis
phone +370 5 261 2758

The quality manager engineer Eglė Baniulienė 

Pursues scientific research in the field of metrology. Improves present and develops new methods and technologies of measurement, takes care of their implementation. Carries out the functions of the Lithuanian national metrology institute. Maintains and develops national standards realizing the units of measurement in the following metrology areas:

  • thermometry;
  • time and frequency;
  • electricity and magnetism;
  • amount of substance;
  • ionizing radiation.

Ensures traceability of the unit values realized to the International system of units SI; by performing measurements and calibrations, disseminates the values to the scientific and state establishments as well as industry of Lithuania; transmits the value of exact time via internet to any user requesting it for free. Together with the „Baltstamp“ company, provides authorized time-stamps to Lithuanian and foreign users. Takes part in international interlaboratory comparisons and proficiency tests (PT), organizes training courses, interlaboratory comparisons, and PT for Lithuanian laboratories. Provides consultancy on metrology issues. Publicly declares the best calibration and measurement capabilities.
The department operates the quality management system implemented following the international standard LST EN ISO 17025.


Quality policy statement
Professional practice at the Metrology Department. I do hereby confirm the commitment of the Metrology Department (MD) to the obligations imposed by the name of the national metrology institute (NMI) and a holder of national standards. MD's activities always comply with the requirements of the highest professional standards. We do hereby state that the MD's staff, following the rules of professional ethics, always fulfill their duties in a honest and client-friendly way.
I assure our customers that we always use verified and validated methods.
We employ only highly qualified personnel with relevant professional skills and accept no service by incompetent people. The laboratories pose proper requirements to all supplies, services, and subcontractors which are important with respect to their operation.
The standard of service by MD. MD is committed to implementing in a due manner the functions of the Lithuanian NMI as defined in the national law. The MD's laboratories are committed to providing the service complying with the highest standard requirements posed to laboratories of the national standards. In every case of test and calibration, the client is unambiguously informed of the level of service it can be provided with, including uncertainties and traceability of the standards used for calibration or testing.
Permanent traceability of MD's standards to BIPM and national standards of other countries is attained by means of interlaboratory comparisons and/or calibration.
Objectives of the quality system. By implementation of the quality system, the MD intends to ensure
  • the best possible quality of the services in all fields of the MD's activity, including implementation of the functions of the Lithuanian NMI;
  • motivation of the staff, their internal and external training;
  • the reliability of every result published in the scientific press by the staff of MD;
  • prompt, in-time, and impartial fulfillment of all the obligations undertaken for the client;
  • the reliability of calibration and testing results.
By promptly following the above principles, we intend to:
  • ensure prompt operation of the Lithuanian metrology system;
  • retain the reputation of a reliable calibration and testing institution which is permanently improving the quality of its service;
  • rule out a possibility of undue external pressure or calibration and testing activities which could put in doubt the correctness of the results presented;
  • avert a possibility of non-conforming work and complaints;
  • increase the weight of calibration certificates and test reports issued by participation in various international activities, Mutual Recognition Arrangement (MRA), and other programmes;
  • attain the recognition by both national and foreign accreditation bodies;
  • attain continuous improvement of the quality system, which necessarily implies improvement of the technical operation
Familiarization of the personnel with the quality system documentation. All the personnel of the MD's laboratories having to do with calibrations or testing, or activities influencing the quality of the operation of the laboratories are familiarized with the quality system documentation, policies, their job descriptions, and the procedures to be implemented by them.
Commitment to compliance with the ISO/IEC 17025. In order to ensure compliance with the ISO/IEC 17025, our personnel have implemented a relevant quality system with its policies and principles formulated in this quality manual. We do confirm our commitment to maintaining the QMS and improvement of its efficiency.

Dr. Evaldas Naujalis
The head of the Metrology Department
International comparisons and proficiency tests
  • EURAMET Project No. 1341: „Comparison on Calibration of Multimeter“;
  • COOMET.EM-SX: „Supplementary Comparison of Resistance at 100 Ω and 100 kΩ“;
  • JRC IRMM 2016 ENV57/MetroERM: „Cs-137, Cs-134 and I-131 measurement in air filters”;
  • IAEA-TEL-2016-03: „World-wide open Proficiency Test on determination of anthropogenic radionuclides in water and biota”;
  • EURAMET.T-K9: „Realizations of the ITS-90 from the Ar triple point to the Zn freezing point“;
  • CCQM-P148: „High Polarity Analytes in Biological Matrix: Determination of Urea and Uric Acid in Human Serum“
  • CCRI(II)-S12.H-3: „Comparison of methods for the calculation of the activity and standard uncertainty of a tritiated-water source measured using the LSC-TDCR method“;
  • Nordic-Baltic gamma-intercomparison GammaSpec2017:  „Massic activity 137Cs < 200 Bq/kg“;
  • EURAMET.QM-S11 „Elements in River Water”;
  • EURAMET Project No. 1437 “The follow-up interlaboratory comparison of the radionuclide calibrators”;
  • IAEA-TEL-2018-03 „World-wide proficiency test on determination of anthropogenic and natural radionuclides in water, soil sample and surface contamination measurement”.
  • CCTF-K001.UTC: „Calculation of the reference time scale UTC (Coordinated Universal Time)“

Temperature Standard Laboratory:

  • cells of the reference points of the temperature scale ITS-90;
  • standard platinum resistance thermometers;
  • standard thermoelectric thermometers;
  • high precision measurement devices for resistance and voltage;
  • baths for maintaining stable temperature (thermostats) and metrologic furnaces;
  • equipment for calibrating reference standards and working measurement devices of the subjects of economy

Time and Frequency Standard Laboratory:

  • cesium atomic clock Hewlett Packard HP5071A;
  • cesium atomic clock Agilent HP5071A;
  • two time transfer systems TTS-2;
  • time transfer system TTS-5;
  • three universal frequency counters SR620;
  • NTP server „Datum Inc Tymserve“;
  • NTP server „Symmetricom“;
  • spectrum analyzer „Rohde&Schwartz 9 kHz ... 3 GHz FSP“;
  • digital storage oscilloscope „Agilent Technologies DSO9254A“.

Electrical standards laboratory

  • “Hypres” primary standard of voltage;
  • secondary Zener voltage standards;
  • multifunctional calibrator Fluke 5720A;
  • multimeters Fluke 8508A and Agilent 3458A;
  • nanovoltmeter Keithley 2182A;
  • 1 Ω and 10 kΩ secondary resistance standards;
  • high precision decade standard resistor set for the range  0,001 Ω to 1 TΩ;
  • resistance measurement bridges 6010Q ir 6000B by „Measurements International“;
  • oil baths Hart Scientific 7015 and Meatest M301;
  • air thermostats.

Ionizing Radiation Metrology Laboratory:

  • primary standards: triple-to-double-coincidence ratio (TDCR) counter; 4π β-γ coincidence gas proportional counter;
  • secondary standards: gamma-ray spectrometer with HPGe detector; well-type ionizing chambers – radionuclide calibrators Fidelis (NPL) and Capintec CRC-15R; liquid scintillation counter Quantulus.
Services available
  • Comparison and investigation of metrological characteristics of the reference point cells;
  • investigation of metrological characteristics and calibration of standard platinum resistance thermometers at the reference points of  ITS-90 (in cells);
  • calibration of platinum resistance thermometers, thermoelectric thermometers (thermocouples), and glass thermometers by means of comparison;
  • calibration and adjustment of electronic thermometers and systems for temperature measurement;
  • organizing interlaboratory comparisons for accredited Lithuanian laboratories.

    Calibration and measurement capabilities in the field of thermometry can be found here by selecting Lithuania in the country list and pressing "Display .PDF file".

  • Calibration of precise oscillators and frequency counters, GPS receivers, tachographic control devices, chronometers, etc;
  • dissemination of precise time via internet. The service is free, available by setting the following address for the internet time server in the computer parameters:;
  • provision of legal and accountable digital time stamp (service provided jointly with the „Baltstamp“ company; a limited number of time stamps per month can be obtained free of charge). More information available at

    Calibration and measurement capabilities in the field of time and frequency can be found here by selecting Lithuania in the country list and pressing "Display .PDF file".

  • Calibration of standard resistors and resistor sets, ohmmeters and resistance measurement bridges, sources of direct and alternate voltage, voltmeters, calibrators, and multimeters.

    Calibration and measurement capabilities in the field of electricity can be found here by selecting Lithuania in the country list and pressing "Display .PDF file".

  • Calibration of the dose calibrators used in Lithuanian hospitals;
  • calibration of radionuclide activity measuring instruments and ionizing radiation sources ensuring traceability to the national standard;
  • sampling of environmental samples near technogenic sources, determination of radionuclide content, dose estimation;
  • peparation of calibration sets with known activities of radionuclides.
  • Sampling of environmental samples near technogenic sources, determination of radionuclide content, dose estimation;
  • Preparation of calibration sets with known activities of radionuclides;
  • EUREKA Project VP1-3.1-ŠMM-06-V-01-033: „Legal Time Distributing System (LTDS)“. Project partners – „PikTime“ (Poland), the Military Academy of Technology (Poland), the Poznan Supercomputer Centre of the Polish Academy of Sciences, and „BaltStamp“ (Lithuania);
  • EUROSTARS Project E!10640 UWB_SENS: “UWB Passive SAW Sensors Based on Hyperbolic Frequency Modulation (HFM)”. Project partners – “GVR Trade” (Switzerland) and „MitSoft“ (Lithuania). Time period: October 1, 2016 – December 31, 2018;
Most important publications
  1. Li, Xiuqin; Zhang, Qinghe; Li, Hongmei; Li, Mengwan; Wong, Siu-kay; Lee, Foo-Wing; Kakoulides, Elias; Naujalis, Evaldas; Fernandes-Whaley, Maria; Prevoo-Franzsen, Des; Quinn, Laura; Pookrod, Preeyaporn; Konopelko, Leonid. CCQM-K103 key comparison melanine in milk powder // Metrologia. ISSN 0026-1394. 2017, vol. 54, no. 1A, art. no. 08018, p. 1-10.
  2. Cassette, Philippe; Altzitzoglou, Timotheos; Antohe, Andrei; Rossi, Mario; Arinc, Arzu; Capogni, Marco; Felice, Pierino de; Galea, Raphael; Gudelis, Arūnas; Kossert, Karsten; Lee, K.B.; Liang, Juncheng; Nedjadi, Youcef; Verdecia, Pilar Oropesa; Shilnikova, Tanya; Wyngaardt, Winifred van; Ziemek, Tomasz; Zimmerman, Brian. Results of the CCRI(II)-S12.H-3 supplementary comparison: Comparison of methods for the calculation of the activity and standard uncertainty of a tritiated-water source measured using the LSC-TDCR method // Metrologia. ISSN 0026-1394. 2019, vol. 56, no. 1A, art. no. 06005, p. 1-22.
  3. Lagzdina, Elena; Lingis, Danielius; Plukis, Artūras; Plukienė, Rita; Germanas, Darius; Garbaras, Andrius; Garankin, Jevgenij; Gudelis, Arūnas; Ignatjev, Ilja; Niaura, Gediminas; Krutovcov, Sergej; Remeikis, Vidmantas. Structural and radiological characterization of irradiated RBMK-1500 reactor graphite. Nuclear engineering and technology. ISSN 1738-5733. 2022, vol. 54, iss. 1, p. 234-243.
  4. Ali Santoro, M.C.; Anagnostakis, M.J.; Boshkova, T.; Camacho, A.; Fornaciari Iljadica, M.C.; Collins, S.M.; Diaz Perez, R.; Delgado, J.U.; Đurašavić, M.; Duch, M.A.; Elvira, V.H.; Gomes, R.S.; Gudelis, Arūnas; Gurau, D.; Hurtado Bermudez, S.; Idoeta, R.; Jevremović, A.; Kandić, A.; Korun, M.; Karfopolous, K.; Laubenstein, M.; Long, S.; Margineanu, R.M.; Mitsios, I.; Mulas, D.; Nikolić, J.K.; Pantelica, A.; Peyres Medina, V.; Pibida, L.; Potiriadis, C.; Silva, R.L.; Siri, S.; Šešlak, B.; Verheyen, L.; Vodenik, B.; Vukanac, I.; Wiedner, H.; Zorko, B. Determining the probability of locating peaks using computerized peak-location methods in gamma-ray spectra as a function of the relative peak-area uncertainty. Applied radiation and isotopes. ISSN 0969-8043. 2020, vol. 155, art. no. 108920, p. 1-6.
  5. Vagner, Milita; Plaušinaitienė, Valentina; Lukose, Rasuole; Keršulis, Skirmantas; Talaikis, Martynas; Knašienė, Birutė; Stanionytė, Sandra; Kubilius, Virgaudas; Motiejuitis, Karolis; Šaltytė, Zita; Niaura, Gediminas; Naujalis, Evaldas; Žurauskienė, Nerija. PI-MOCVD technology of (La, Sr)(Mn, Co)O3: From epitaxial to nanostructured films. Surface and coatings technology. ISSN 0257-8972. 2020, vol. 385, art. no. 125287, p. 1-8.
  6. Adliene, D.; Griciene, B.; Skovorodko, K.; Laurikaitiene, J.; Puiso, J. Occupational radiation exposure of health professionals and cancer risk assessment for Lithuanian nuclear medicine workers. Environmental research. ISSN 0013-9351. 2020, vol. 183, art. no. 109144, p. 1-10.
  7. Skovorodko, Kirill; Bareikė, Milda; Gudelis, Arūnas; Gricienė, Birutė. Occupational exposure in a PET/CT facility using two different automatic infusion systems. Physica medica. ISSN 1120-1797. 2020, vol. 77, p. 169-175.
  8. Remeikis, Vidmantas; Plukienė, Rita; Plukis, Artūras; Barkauskas, Vytenis; Gudelis, Arūnas; Druteikienė, Rūta; Gvozdaitė, Rasa; Juodis, Laurynas; Duškesas, Grigorijus; Lagzdina, Elena; Germanas, Darius; Ridikas, D.; Krutovcov, S. Characterisation of RBMK-1500 graphite: A method to identify the neutron activation and surface contamination terms. Nuclear engineering and design. ISSN 0029-5493. 2020, vol. 361, art. no. 110501, p. 1-10.
  9. Lukošė, Rasuolė; Plaušinaitienė, Valentina; Vagner, Milita; Žurauskienė, Nerija; Keršulis, Skirmantas; Kubilius, Virgaudas; Motiejuitis, Karolis; Knašienė, Birutė; Stankevič, Voitech; Šaltytė, Zita; Skapas, Martynas; Selskis, Algirdas; Naujalis, Evaldas. Relation between thickness, crystallite size and magnetoresistance of nanostructured La1−xSrxMnyO3±δ films for magnetic field sensors. Beilstein journal of nanotechnology. ISSN 2190-4286. 2019, vol. 10, p. 256-261.
  10. Deivis Plaušinaitis, Birutė Knašienė, Aleksandr Prokopchik, Evaldas Naujalis, Adrián Vicent Claramunt. Simultaneous detection of Mn, Co, Ni, and Cu using ion chromatography coupled with ICP-MS with a special focus on the determination of 59Ni in corrosion deposits. Journal of radioanalytical and nuclear chemistry. ISSN 0236-5731. 2018, vol. 316, iss.1, p. 257-265.
  11. Bruggeman M., Collins S.M., Done L., Đurašević M., Duch M.A., Arūnas Gudelis, Hyža M., Jevremović A., Kandić A., Korun M., Ilie S., Lee J.M., Lee K.B., Luca A., Margineanu R.M., Pantelica A., Serrano I., Šešlak B., Tugulan L.C., Verheyen L., Vodenik B., Vukanac I., Zeng Z., Zorko B.. Systematic influences on the areas of peaks in gamma-ray spectra that have a large statistical uncertainty. Applied radiation and isotopes. ISSN 0969-8043. 2018, vol. 134, p. 51-55.
  12. Philippe Cassette, Timotheos Altzitzoglou, Andrei Antohe, Mario Rossi, Arzu Arinc, Marco Capogni, Raphael Galea, Arūnas Gudelis, Karsten Kossert, K.B. Lee, Juncheng Liang, Youcef Nedjadi,; Pilar Oropesa Verdecia, Tanya Shilnikova, Winifred van Wyngaardt, Tomasz Ziemek, Brian Zimmerman. Results of the CCRI(II)-S12.H-3 supplementary comparison: Comparison of methods for the calculation of the activity and standard uncertainty of a tritiated-water source measured using the LSC-TDCR method. Applied radiation and isotopes. ISSN 0969-8043. 2018, vol. 134, p. 257-262.
  13. Rasa Godliauskienė, Vytautas Tamošiūnas, Evaldas Naujalis. Polychlorinated dibenzo-p-dioxins/furans and dioxin-like polychlorinated biphenyls in food and feed in the Lithuanian market. Toxicological & environmental chemistry. ISSN 0277-2248. vol. 99, iss. 1 (2017), p. 65-77.