FIELD: chemistry.
SUBSTANCE: invention relates to electrolytic method of producing aluminium. Device for determining concentration of alumina in electrolyte of aluminium electrolytic cell comprises independent AC voltage source, DC voltage grading, low-frequency electric filter and graphite sensor. At that, independent source of AC voltage is made with possibility of AC voltage supply into circuit of graphite cathode bus-sensor. Output of low-frequency filter is connected to DC voltage recorder, and input is connected to autonomous source of AC voltage.
EFFECT: technical result-increase measurement accuracy and efficiency of determining concentration of alumina.
1 cl, 1 dwg
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