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Fiber optic sensor for monitoring the absolute angle of inclination of building structural elements

A sensor of absolute angle of inclination based on effect of retention of spatial orientation of border between liquid and air inside inclined encasement with using optical fibers for readout of border's location is developed. The measuring angle range is 0÷1°, threshold sensitivity - 0.02°. The sensor can be used in precision measuring systems for monitoring the absolute angle of inclination of structural elements of buildings.