MOISTURE METER OF PROCESS LIQUIDS Russian patent published in 2019 - IPC G01N25/56 G01N22/04 G01F23/24 

FIELD: measuring equipment.

SUBSTANCE: invention relates to measurement equipment, namely, to moisture content of process fluids, for example, oil and oil products, to monitoring of moisture content of motor, turbine and transformer oils. Moisture measuring device of process liquids includes remote wire probe configured to transmit a signal to each other, which is immersible into oil, heating and control unit, wherein heating and control unit comprises current generator, switch, first output of which is connected to generator input, first and second digital-to-analog converters of current control of first and second heating pulses, which outputs are connected to first and second inputs of switch, first and second digital-to-analogue temperature adjustment transducers of probe heating amplitudes, first and second comparators, which inputs are connected to outputs of first and second digital-to-analogue temperature adjustment transducers of probe heating thresholds, microprocessor, which is connected to outputs of first and second comparators, wherein the third input of the switch is connected to the microprocessor, and the fourth input of the switch is connected to the first comparator, the first and second amplifiers, the outputs of which are respectively connected to the inputs of the first and second comparators, first analogue-to-digital converter for transmitting a first pulse voltage signal to a microprocessor which is connected to the output of the first amplifier, a second analogue-to-digital converter for transmitting the voltage signal of the second pulse to a microprocessor which is connected to the output of the second amplifier.

EFFECT: technical result observed during implementation of disclosed solution consists in increase of moisture monitoring sensitivity in process liquids, providing the required level of accuracy during measurements of heat release, high accuracy of transmitting a signal on a second pulse, reducing errors in setting temperature and improving recurrence of the trajectory of heating at the second measurement pulse, increasing the useful signal amplitude on the second pulse while maintaining the accurate current switching function when the preset threshold is reached from the probe heating temperature at the first pulse.

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