FIELD: petrochemistry and laboratories such as those for measuring moisture percentage and salinity influencing engine efficiency and breakdown voltage of transformer oil.
SUBSTANCE: analyzed specimen in the form of small-diameter rod is placed in first cylindrical resonance cavity and E010 or E011 electromagnetic field is excited to determine low or high values of moisture volume concentration, respectively. Working Q of first cylindrical resonance cavity that serves as measure of moisture volume concentration in liquid medium being analyzed is measured; then analyzed specimen in the form of small-diameter cylindrical rod is placed in second cylindrical resonance cavity, E010 or E011 electromagnetic field is excited to determine low or high values of moisture volume concentration, respectively, and working Q of second cylindrical cavity is measured at frequency ensuring that loss due to rotational relaxation of water polar molecules is comparable with that due to salinity. In this case working Q of second cylindrical resonance cavity serves as moisture salinity measure and frequency of first cylindrical resonance cavity is chosen to ensure that loss due to rotational relaxation of polar water molecules in microwave region is much higher than that due to salinity. Device used to evaluate moisture content and its salinity in liquid media has cylindrical resonance cavity with pipeline carrying analyzed liquid disposed on its axis, tunable microwave oscillator, and Q meter. Output of tunable microwave oscillator is connected to exciting loop, input of Q meter, to receiving loop of cylindrical cavity, and control output of Q meter, to control input of tunable microwave oscillator. It also has second cylindrical resonance cavity filled with low-loss dielectric that incorporates pipeline carrying analyzed liquid disposed on its axis. Diameters and axes of cylindrical cavities are aligned. Newly introduced are second tunable microwave oscillator and second Q meter; output of second tunable microwave oscillator is connected to exciting loop, input of second Q meter, to receiving loop of second cylindrical cavity, and control output of Q meter, to control input of second tunable microwave oscillator.
EFFECT: ability of determining liquid media salinity along with its moisture content.
2 cl, 1 dwg
