Laboratory Hydrometer: characteristics, prices, uses, models …

November 2, 2021

The instruments that can be found in laboratories such as micropipettes , test tubes and in this case the Laboratory Hydrometer . The latter being the one we will focus on currently.

What is the Laboratory Hydrometer?

As much we must know the laboratory materials , they are of the utmost importance since it makes the tasks much easier. In the particular case of the Laboratory Hydrometer, this is an instrument that every scientist should know.

When we talk about a Hydrometer we are referring to a liquid measurement tool. As its name indicates with the prefix hydro which means water, so in simple terms this is an instrument used for the measurement of liquids.

Although it has a very simple design and operation, the truth is that it is one of the most important instruments in the laboratory. In fact, it is widely used in various areas such as biology, chemistry, civil engineering and road safety. At the same time it can be used in industrial specialization.

In more detail we can say that this instrument works to measure the force and speed of any liquid that is present. These are generally made of glass and are made up of a stem and a bulb. Being located in the upper part within which we can find a small amount of lead or mercury.

It must be taken into account that these last two elements are what allow the measurement to be carried out through their behavior at the time of taking the sample.

Laboratory Hydrometer Features

To begin we must know that these instruments are generally made of a fragile material. Two clear examples are glass and glass. If we talk about its shape, we can say that it is a light bulb, with a higher stem on its surface. Being lower at the bottom of it.

In the bulb we can find a quantity of lead or mercury, which gives it the ability to float when it is introduced into the liquid. While in the stem we can see the scale where the density is indicated.

What is the Laboratory Hydrometer for?

As we have been mentioning, the Laboratory Hydrometer is an instrument used to measure the weight, force and speed of the liquid . Thanks to this we have much more accurate and reliable data. It is important to note that this is considered a very reliable element when it comes to obtaining data from a liquid.

However, we must bear in mind that it is one of the most delicate elements out there. As we mentioned before, it is made of delicate materials such as glass. Even so, professionals in the area of ​​science and health generally use this type of instrument.

They do this in order to know the behavior of a liquid, since this works to give a concise measurement of the separation of molecules in it. A very important point that we must highlight is that thanks to its existence, it was possible to determine that if it was possible to measure the density of any liquid and its speed, weight and force.

In general, this device is used to measure the levels of sulfuric acid, being able to adjust the temperature of this acid and see its composition accurately. But we must mention that this laboratory material can be used on a daily basis in areas such as industrial.

The Laboratory Hydrometer is very important in the production of beverages and food . Being especially fundamental in the process of making wines, alcoholic beverages and dairy products.

It must be taken into account that in the production of beverages it is necessary to have a certain density . Due to this, it is very important to use a laboratory hydrometer in its realization, since it offers precise data for the elaboration of beverages.

How to use the Laboratory Hydrometer?

The use of this instrument is not complicated at all, the first thing we should have on hand are test tubes. In the latter we will add the product that we want to analyze, we must mention that the size of the sample can be large or small.

However, it is important to know that there are some samples that cannot be analyzed. Due to this we must be very careful with the type of sample that we are going to place.

Then when we have the liquid ready, and we are sure that it can be analyzed, we must take the Hydrometer to analyze the variations of the liquid . After this we must check the temperature of the hydrometer. Once this is done, we must evaluate the temperature every five minutes. It is important that each time we check the temperature we make corresponding notes to verify the variations of the liquid.

Types of Laboratory Hydrometers

The Laboratory Hydrometer has several types, especially when it comes to industrial level. But a great variety of Hydrometer can also be found in areas such as civil engineering and health . To better understand the aforementioned we can say that this instrument has the following types;

Hydrometer PCE-555

In this case we are talking about a type of portable digital Laboratory Hydrometer . Which is used mainly to measure the environmental humidity and the temperature of the same. In fact, it can offer the temperature of the spray.

The emergence of this type of Hydrometer is due to the need to perform rapid humidity and temperature measurements. On the other hand, we must add that this instrument is widely used in food production, since it can give values ​​such as the temperature of the wet bulb. Thanks to this they can be used to prevent the formation of fungi.

Although this laboratory utensil can be used in other areas, a clear example is in civil engineering. In the latter case, it is used to determine the condensation on the walls. If we talk about the characteristics of this device, we can say that it has a humidity sensor, which can be used to measure the humidity that surrounds it.

Sugar hydrometer or saccharimeter

As its name indicates, this device is designed to know the amount of sugar that the blood can have. Although it can also be used to measure the amount of sugar in a certain product at an industrial level.

Dairy hydrometer or lactometer

Another Laboratory Hydrometer is the dairy one, which, as we can imagine, is adapted and specialized to know the amount of fats that we can find in milk. This is done while it is still in its liquid state.

Alcohol hydrometer or breathalyzer

This is a hydrometer used by law enforcement. All to measure the amount of alcohol that a person has in the body. It is characterized by being similar to the lactometer. But as we can imagine, this one differs from the other because it is used to measure the amount of alcohol.

We must mention that apart from knowing the amount of alcohol in a person’s body. This is also used to measure the amount of this substance necessary to produce alcoholic beverages.

Hidrómetro Standard

In this case we have two types, the first is the one that has thermometers and the other does not, which depends on the function that is going to be given. When we talk about those with thermometers, these are used to measure 0 ° C to 30 ° C.

On the other hand, if we are talking about a Standard Laboratory Hydrometer that does not have thermometers, they use the temperature of 20 ° C as a reference . As regards length, this may vary depending on whether or not it has the thermometer.

Search hydrometers

This is another Laboratory Hydrometer, which does not have a thermometer and contains a scale division of 0.005g / cm3. Besides, these refer to a temperature of 20 ° C and its dimension is approximately 300 mm in length.

However, we must bear in mind that the scale division may vary. However, its temperature reference does not vary, but its dimension in length does vary . The latter will depend on the model in question.

ASTM Hydrometer

To finish with the types of Laboratory Hydrometers, we find the ASTM type hydrometer. This being the last one used to measure the gravity of liquids.

It is important that people become familiar with the different types of hydrometers or at least know the hydrometer well depending on the area where they specialize. It must be taken into account that this instrument is of great importance in a large number of sectors. It is thanks to this that great technological and scientific advances have been made.

Video on Hydrometry


With all the aforementioned, the Laboratory Hydrometer is a very important instrument in the industrial, science, health, civil engineering and aquarium sectors. In the latter case we are talking about an instrument known as a salimeter , which can detect the level of salt in the water.

Those mentioned are just some of the places that can be used, since it can be used in a large number of sites. So it is extremely important that it is in laboratories.

Dr. Loony Davis5
 | Website

Born and raised in Brussels in an English family, I have always lived in a multicultural environment. After several work experiences in marketing and communication, I came to Smart Water Magazine, which I describe as the most exciting challenge of my career.
I am a person with great restlessness and curiosity to learn, discover what I do not know, as well as reinvent myself daily, someone who is curious about life and wants to know. I enjoy sharing knowledge.
This is my personal project but I also collaborate in other blogs, it is the case, the most important web on water currently exists in the US, if you are interested you can read my articles here.

Leave a Reply

Your email address will not be published. Required fields are marked *