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Information × Registration Number 0210U005551, 0109U002601 , R & D reports Title Tiny electrochemical sensors and sensor's systems for definition of oxygen in environments natural and anthropogenic origins popup.stage_title Head Linyucheva Olga Volodymyrivna, Registration Date 16-12-2010 Organization National Technical University of Ukraine "Kyiv Polytechnic Institute" popup.description2 The technology of manufacturing of two-electrode amperometric sensor for determination oxygen in the air of natural and man-made environments, and drafted the relevant patents for utility model. A mathematical model of the sensor based on an open electrochemical system, the stability characteristics of a balance is maintained spontaneous processes. The created model is the basis of a scientific approach to the development of sensors with desired characteristics and to assess their stability. Prototype of a miniature (20х20 mm) sensor for the determination of oxygen in the range of 9 % to 25% in the air with the duration of the transition process 95 is less than 15 seconds. Unlike existing in the world market of three-and four-electrode sensors developed by the sample does not waste energy in the process of measurement and because of the diffusion resistance in the form of separate parts with a calibrated hole (in contrast to the existing membrane) has a low temperature dependence of the signal. The principles of miniaturization of individual electrodes and amperometric oxygen sensor as a whole. Guaranteed life 1 year achieved the original design of porous lead anodes with advanced power connection and high yield catalytically active working electrode due to its structure and method of manufacture. Increased resource working electrode reached a solution of technical contradictions between its destruction as a result of swelling of the separator with high conductivity and unacceptable increase in the duration of transient processes in attempts to eliminate the swelling of the separator, which was accompanied by an increase in its ohmic resistance. Solution of contradiction is the removal of direct contact of the catalyst with power connection and a separator due to the introduction of a hydrophilic porous nickel underlayer, which plays the role of current collector, the contact area, the geometric aberration compensator separator and hydrodynamic damping for the electrolyte. The last function of the sublayer has solved the problem electromotive effect - the ripple current signal with sharp drops in pressure of the medium analyzed. Reliability and service life of the auxiliary electrode is increased by choosing the size of grains of lead relative to the size of the electrode, the choice of optimum conditions for compaction and the creation of advanced current supply. Product Description popup.authors Букет Олександр Іванович Ващенко Олександр Миколайович Косогін Олексій Володимирович Кушмирук Андрій Іванович Мірошниченко Юлія Сергіївна Нагорний Олексій Вікторович popup.nrat_date 2020-04-02 Close