Hydrometer

Hydrometer Hydrometer (aerometer - from the Greek. Araiys - weak, here - liquid, and metr?? - measure) is a device used to measure the density of liquids and solids. The operation of the hydrometer is based on the Archimedes principle that the weight of a fluid displaced by a suspended solid (in this case by a hydrometer) equals to its weight. The immersion depth of a hydrometer (the volume of the fluid displaced by it) and the weight of the hydrometer can show the density of the test fluid. In practice, two types of hydrometers are used: constant weight hydrometers (more common) and constant volume hydrometers. Constant weight hydrometers are densimeters, which are calibrated in units of density, and hydrometers used to measure solutions concentration, calibrated in % by volume or by weight. Most hydrometers designed to measure concentration of substances in certain liquid mixtures and solutions have special names: lactometers, which determine the fat content of milk, alcoholometers - for alcohol content in water, saccharometers - for sugar contents in syrups (by mass, %), and so on. Density is read off directly from the scale of a densimeter. The scale of a reference densimeter is 0.0001, 0.0002 and 0.0005 g/cm3, of an operational one (depending on measurement limits) is from 0,0005 to 0,02 g/cm3, in hydrometers that measure concentration - from 0,1 to 2%. When measuring density, the weight of a hydrometer changes, so that the volume of the submerged part of a hydrometer remains the same. The density is determined by the mass of weights, taken or added for the hydrometer to sink down to the mark indicating the volume of displaced fluid. The density of solids is measured by constant volume hydrometers with an additional plate attached to bottom of the hydrometer casing (hydrometer scales).The most common function of the hydrometer in the household is to measure the acid density in a car battery. This hydrometer model has an internal capacity, in which there are floats of different weights. A float emerges at the level of the value equal to the density of the test electrolyte. It depends on the density of the solution. The white float corresponds to the nominal density. With a hydrometer you can find the density of a liquid and, accordingly, its parameters.

Category:

Science & Technology

Tags:

• liquid
• measurement

[HewingEnterprise]

@hemanthmanikantasaip

Unbelievably rude comment!!

[hemanthmanikantasaip]

Could you please directly explain in English?