In the different laboratories of the different disciplines and sciences, different types of materials and instruments are always used to carry out tasks, experiments or tests. Regardless of whether it is physics, chemistry, biology, engineering, medicine or any other science or discipline, measuring is one of the main activities that take place inside a laboratory, because to sustain the results of any study it is necessary to present data, statistics, numbers that endorse the results.

Now, when you talk about the industry, perhaps there are no experiments or tests, probably only produce a product, but for this it is also necessary to measure, because the quantities of many substances, compounds, reagents, mixtures and others must be accurate, otherwise the result might not be what you expected. Therefore, among the most common materials used by science and industry are measuring devices.

To understand perfectly what these instruments are, it is necessary to define what is to measure. In general terms, to measure is to assign a numerical value to an object, characteristic or phenomenon in order to determine its magnitude, in comparison with other objects, characteristics or phenomena.

In a simpler way, it can be said that measuring is the action of knowing the quantity, magnitude or size of an object, quality or phenomenon, with the use of parameters, units and standardized patterns. Consequently, measuring devices are instruments that are used to measure, instruments that have one or several scales of measurement determined to know the magnitude of different objects or phenomena, depending on the type of device.

Of course, there are various types of instruments and devices that are used to measure, some mechanical, some electrical and some highly specialized in certain objects, materials or phenomena. In general, these instruments can be divided in different ways and categorized in different ways, but the best way to identify these tools is by categorizing them based on the property they measure.

In this way, these instruments can be divided into those that measure mass, length, time, temperature, pressure and other magnitudes. Among the instruments for measuring mass, is the balance, one of the most well-known tools used in the laboratory and in many other areas. The simplest balance basically involves a lever formed by two arms that allows measurements based on an equilibrium situation.

A similar instrument is the scale, another of the most common measuring devices and used in different tasks and industries. This type of instrument has a mechanism similar to that of the balance, but in this case it is a set of levers that are used to find the balance between the mass of the object and a graduated pylon. On the other hand there are the instruments to measure length, among which are the tape measure, the rules and the flexometer.

Another type of very common instruments are those that measure time. As a basic instrument for this, the clock can be considered as a tool for everyday use. However, there are instruments that measure time much more accurately and with much more specific objectives such as the chronometer and the atomic clock, devices that measure minimum fractions of time.

These measuring devices are perhaps the most common, especially since their use is very general and can be used in the daily life of many people, because its use is not limited to the laboratory or the industry. However, there are many other instruments of this type such as those that measure speed (speedometer and anemometer), those that measure temperature (thermometer and pyrometer) or those that measure pressure (barometer and manometer), this without counting other devices that measure phenomena or magnitudes very particular and that are used, generally, in industries or very specific scientific fields.

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