METHOD OF MEASURING DENSITY OF LIQUID AND DEVICE FOR MEASURING DENSITY BY THIS METHOD

摘要

FIELD: measuring equipment.;SUBSTANCE: invention relates to methods and apparatus for determining liquid density. Cylindrical plunger, which shank is located on sensitive element of scales outside liquid, is weighed twice, for the first time weight G₁ isolated plunger, then fully immersed into liquid float with exactly known weight and volume is released, bringing it into axially symmetric contact with plunger, and measuring force G₂. Fluid density is calculated by formula ρ_L=(G₁-G₂+G_fl)/(gV_fl), where G_fl – weight of float, V_fl is volume of float, and g is acceleration of gravity. Device comprises a plunger with a shank arranged on a sensitive element of electronic scales. Inside the shank there is a rod which does not contact the plunger, the movement of which provides one of three possible positions of the completely immersed float: the float is pressed to the plunger by a rod, measurement is not performed; float does not contact with plunger, but is retained by rod, measurement G₁; float has contact with plunger, but does not touch the rod, measurement G₂.;EFFECT: high accuracy of measurements in a wide range of variation of density of liquids, elimination of subjective errors during measurements and easy automation of the measurement process.;4 cl, 4 dwg