How to use a hydrometer?

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How to use a hydrometer?

The hydrometer is, in fact, a float, the upper part of which is occupied by a scale calibrated for electrolyte (kg / m3) and for antifreeze (° C). How correctly to use hydrometer?

Measurement of electrolyte density

Measure the density of the liquid inbattery - the procedure is not complex, but requires accuracy and care. It is necessary to collect from the banks of the battery in the hydrometer the necessary amount of liquid (electrolyte), arrange the hydrometer vertically and note to what value the lower edge of the meniscus corresponds.

Measuring the density of other liquids

How to use a hydrometer when measuringdensity of other liquids? This process is not much more complicated than described above. We need a hydrometer and a certain, not very wide vessel with a liquid. The depth of the vessel should not be less than 20-25 cm, the capacity - not less than 0.5 liters. We fill the glass cylinder with liquid and carefully immerse the hydrometer in it. The device is not released from the hands until we are convinced that the hydrometer has reached the level at which it can independently float. This is necessary in order that the glass device is not damaged by the bottom of the vessel. The hydrometer loaded into the vessel is located so that, being approximately in the middle, it does not touch the walls of the reservoir. Measurements can be taken, the surface of the liquid will hardly calm down. We note the index of the scale to which the device "drowned" in the liquid, this is the desired value of the density.

Do not forget that the density of the liquidIts temperature significantly influences, and it can be significantly increased. Therefore, before removing the density index, it is necessary to ensure that the temperature of the measured liquid corresponds to the normative one.

Precautionary measures

By checking the hydrometer density of the electrolyte, wecome in contact with acid - a very aggressive environment. Acidic acid on clothing leads to its inappropriate, and if it gets on the skin, a chemical burn occurs. A catastrophe may result in acid entering the eyes. You should remember this and, using appropriate measurements, use protective clothing, gloves and goggles.

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