FIELD: measurement technology.
SUBSTANCE: invention can be used to determine the position of interfaces of a three-component medium, for example, air and liquids with different density. Method comprises arranging two lengths of a long line, exciting electromagnetic oscillations at its resonant frequency ƒ1 and ƒ2, performing their joint functional transformation, measurement ƒ1 and ƒ2 is performed in sections performed with uniform distribution of energy of electric field along them, identical, but in each of them one of conductors is covered along entire length with dielectric shell, which is different from each other in thickness or (and) dielectric permeability, position of each interface is determined from the difference of values, the first of which is proportional to the difference between the value proportional to the square of the ratio of the value of ƒ1, respectively, in the absence of the controlled medium to its value in the presence of this medium in the container, and a unit, and second value is proportional to difference between value proportional to square of ratio of value ƒ2, respectively, in the absence of a controlled medium to its value in the presence of said medium, and a unit.
EFFECT: broader functional capabilities.
1 cl, 2 dwg
