DEVICE FOR MEASURING ELECTRIC CONDUCTIVITY OF LIQUIDS Russian patent published in 1997 - IPC

FIELD: electrical measurement technology. SUBSTANCE: device has sinusoidal signals generator 1, controlled attenuator 2, power amplifier 3, power transformer 4 with an exciting winding, instrument transformer 5 with a measurement winding, closed loop 5 enclosing a conducting liquid to be measured, loop 7 made of conducting material, voltage amplifier 8, first 9 and second 11 peak detectors, measurement circuit 10, comparison circuit 12, reference voltage source 13 and controller 14. EFFECT: higher sensitivity, accuracy and operational stability; range of measurement extended to lower conductivity liquid media. 2 cl, 1 dwg