How do you measure specific gravity?
The best way to measure specific gravity is to weigh a container and record its weight, then weigh the container full of water and full of the liquid of unknown specific gravity. Subtract the weight of the container from each weight and divide the weight of the liquid being measured by the weight of the water.
Which instrument is used for rapid determination of specific gravity?
Pycnometers
Pycnometers offer the most convenient and rapid method for determining specific gravity.
Which machine is preferred for specific gravity test?
Specific Gravity Bench is the best solution for weighing suspended samples in water for specific gravity measurements of aggregates, hardened concrete, bituminous mixtures, and many other materials. Specific Gravity Water Tanks have a 30gal or 44gal capacity and are equipped with drain and overflow outlets.
Why do we measure specific gravity?
4.1 Specific gravity is an important property of fluids being related to density and viscosity. Knowing the specific gravity will allow determination of a fluid’s characteristics compared to a standard, usually water, at a specified temperature.
How do you read a specific gravity hydrometer?
The most common scale on hydrometers is “specific gravity.” This is the ratio of the liquid’s density to the density of water. Pure water should give a reading of 1.000. A higher reading means the liquid is denser (heavier) than water, and a lower reading means it is lighter.
What does a pycnometer measure?
A pycnometer allows measuring the volume and the density of solid objects in a non-destructive manner.
What are the factors affecting specific gravity test?
Specific gravity varies with temperature and pressure; reference and sample must be compared at the same temperature and pressure or be corrected to a standard reference temperature and pressure. Substances with a specific gravity of 1 are neutrally buoyant in water.
What are the clinical applications of specific gravity?
Measurement of specific gravity provides information regarding a patient’s state of hydration or dehydration. It also can be used to determine loss of renal tubular concentrating ability. There are no “abnormal” specific gravity values. This test simply indicates urine concentration.
What are the factors affecting specific gravity?
What is a hydrometer used to measure?
A hydrometer is an instrument used to determine specific gravity. It operates based on the Archimedes principle that a solid body displaces its own weight within a liquid in which it floats. Hydrometers can be divided into two general classes: liquids heavier than water and liquids lighter than water.
What are the different types of pycnometer?
There are three kinds of gas pycnometers reported in the literature: “constant- volume,” “variable-volume,” and “comparative.” These instruments are widely used to determine the volume – and thus the density – of granular, porous, or soluble compounds (e.g., rocks, coal, pigments, ceramic, drugs, seeds).
What instrument measures specific gravity?
A hydrometer is a scientific instrument used to measure both the specific gravity and the density of a liquid, based on Archimedes ’ principle of buoyancy. It is composed of a sealed glass bulb with a long skinny tube connected to one end, and it is weighted with mercury or lead shot under the bulb so it can float upright.
What is the difference between density and specific gravity?
Density and specific gravity are both indications of how much mass a substance would occupy in a given volume. The main difference between density and specific gravity is that density is the mass per unit volume of the substance whereas specific gravity is a ratio comparing the density of one substance to the density of another reference substance.
What is sp gravity?
spe·cif·ic grav·i·ty (sp. gr.), the weight of any body compared with that of another body of equal volume regarded as the unit; usually the weight of a liquid compared with that of distilled water.
What is the specific gravity of water?
The specific gravity of water varies with temperature, however, at 4 degrees Celsius the specific gravity of water is 1. Some people wonder why some objects float on water while others sink.