FIELD: devices for measurement of sizes of particles; concentration of minerals; mining and abrasive industries; construction engineering. SUBSTANCE: proposed device includes sensitive element made in form of micrometric feeler gauge consisting of measuring rod and step bearing, electric drive with cam mechanism and inductive sensor of converter changing motion in voltage. Connecting lever of measuring rod and converter rod is shifted along their axes; length of measuring rod is selected depending on definite conditions. EFFECT: enhanced accuracy of measurement under varying temperature conditions of pulp and surrounding air. 2 cl, 2 dwg
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