ELECTRICAL CONDUCTIVITY SENSOR MEASURING AGAINST DIRECT CURRENT OF LIQUID SUBSTANCES WITH LOW SPECIFIC ELECTRICAL CONDUCTIVITY Russian patent published in 2014 - IPC G01N27/07 

FIELD: electricity.

SUBSTANCE: sensor comprises two electrodes rigidly interconnected through a dielectric spacer. At that one (the first) electrode is made as a cylinder with a radius R₀ and height h₀ with N round cylindrical openings with a radius R; symmetry axes of the openings are parallel to the cylinder rotation axis. The second electrode is made as N round cylindrical pins with a radius r (r<R) and length h, rigidly fixed on the cylindrical base with the radius R₀ of the orthogonal butt end surface of the base. The dielectric spacer is made as a cylinder with the radius R₀ and height h₁ with N cylindrical via openings with the radius r; symmetry axes of the openings are parallel to the cylinder rotation axis; length of the pins of the second electrode should not exceed the total length of the first electrode cylinder and the dielectric spacer cylinder h≤h₀+h₁. Pins of the second electrode are placed one by one in the openings of the first electrode cylinder and openings of the dielectric spacer cylinder so that the symmetry axis of each pin of the second electrode and the symmetry axis of the opening in the first electrode cylinder and the opening in the dielectric spacer cylinder with the pin placed match each other.

EFFECT: measuring of specific electrical conductivity against direct current of liquid substances with low specific electrical conductivity, including viscous solutions and melts, improved accuracy of measurements.

1 dwg