FIELD: measurement equipment.
SUBSTANCE: in the method to measure relative air humidity based on measurement of difference of oscillation frequencies of resonators - a working and a reference ones with subsequent amplification of an analytic signal and regeneration of film coatings with an inert gas, three piezoquartz resonators are used with internal oscillation frequencies of 13-16 MHz, two of which are working ones with different hydrophilic coatings, properties of which are optimised for operation in a certain range of temperatures, and one is a reference resonator without a film coating, which supports the permanent frequency of oscillations, at the same time the device is equipped with a switch of working resonators.
EFFECT: measurement of relative air humidity in a wide range of temperatures, also in the negative range, higher accuracy of measurements, reduced time of regeneration of film coatings of resonator electrodes.
2 dwg
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