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Abstract. Calibration and testing of medical devices are one of the most important and critical issue in metrology field. Although metrological links has been well established for measurements in technical and military field, metrology link is not powerful enough for measurements in medical field. For the medical device industry and applications in health sector, nothing counts more than the safety of a patient. Therefore all hospitals & medical equipment manufacturers have to perform periodic testing and calibration of equipments, as a quality control regimen that guarantees the reliability of medical devices. Test, measurement and calibration of bio-medical equipments is becoming increasingly significant, when accuracy in diagnosis and effectiveness in treatment is required. A feasibility study has been carried out and a report was published last year at TÜBİTAK UME (The Scientific and Technological Research Council of Turkey, National Metrology Institute) in order to outline the current situation in the country. A five year roadmap and a a plan were programmed for providing of reliability and metrological traceability in medical measurements. Medical metrology research laboratory has been established and a number of medical device design projects were initiated.

The new definition of kilogram in terms of the fixed value of Planck constant ensures the long-term stability of SI mass unit and enables traceability from more than one source. Kibble balance experiments offer an effective primary realization method for the new definition of kilogram. Kibble Balance apparatus operating at National Metrology Institute of Turkey is designed with a stationary coil and an oscillating magnet. In contradistinction to traditional moving coil Kibble balance experiments, external magnetic field brings an asymmetry between the Ampere’s law of force and the Faraday’s law of induction in moving magnet experiments. In this paper, we develop a method based on the external magnetic flux density difference measurements in vertical direction to take into account the effect of the external magnetic field on the realization of kilogram. The proposed model in this approach fits well with the data such that the kilogram realization requirement is met within the accuracy of the measuring instrument.

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Magneto-optical indicator films (MOIFs) are a very useful tool for direct studies of the spatial distribution of magnetic fields and the magnetization processes in magnetic materials and industrial devices such as magnetic sensors, microelectronic components, micro-electromechanical systems (MEMS), and others. The ease of application and the possibility for direct quantitative measurements in combination with a straightforward calibration approach make them an indispensable tool for a wide spectrum of magnetic measurements. The basic sensor parameters of MOIFs, such as a high spatial resolution down to below 1 μm combined with a large spatial imaging range of up to several cm and a wide dynamic range from 10 μT to over 100 mT, also foster their application in various areas of scientific research and industry. The history of MOIF development totals approximately 30 years, and only recently have the underlying physics been completely described and detailed calibration approaches been developed. The present review first summarizes the history of MOIF development and applications and then presents the recent advances in MOIF measurement techniques, including the theoretical developments and traceable calibration methods. The latter make MOIFs a quantitative tool capable of measuring the complete vectorial value of a stray field. Furthermore, various scientific and industrial application areas of MOIFs are described in detail.