Reference for citation: Maiorov E. E., Kostin G. A., Kurlov V. V., Baranov N. E. Study of modern aviation hydraulic fluids based on phosphate ester by refractometric method. Journal of Instrument Engineering. 2024. Vol. 67, N 7. P. 609–614 (in Russian). DOI: 10.17586/0021-3454-2024-67-7-609-614.

Abstract. Results of a study of modern aviation hydraulic fluids based on phosphate ester carried out with the use of laboratory refractometer IRF "Compact", are presented. Experimental data on the refractive index depending on the concentration and temperature of the solutions of the studied aviation hydraulic fluids are obtained. Highly accurate and reliable information on the composition and consumption of the substance is necessary for the work of airport technical services. The optical diagram and technical parameters of the measuring device are given.

Keywords: refractometer, aviation hydraulic fluid, concentration, temperature coefficient, polynomial, refractive index, approximation

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