Humans have a need to establish concrete parameters or measurements to clarify information about temperature , distances, weight or pressure. In the case of pressure, the manometer is the instrument used to measure the pressure of fluids that are contained in a container. This type of apparatus sets the difference between fluid pressure and atmospheric pressure .
The scaling on an analog manometer and some of its applications
Two different scales appear on the button of this instrument. In one of them, the pointer indicates the pounds per inch squared and, in the other, the kilograms per square centimeter (the latter are equivalent in turn in bars). Thus, when the manometer is connected to a pressure source, the indicator hand moves across both scales determining the exact pressure value. Naturally, the pressure gauge must be accurate and precise. Manometer
These devices make it possible to establish a comparison between atmospheric pressure and that within a circuit in which a fluid circulates, whether it is a liquid or a gas. With this tool it is possible to establish measurements in the hydraulic or pneumatic circuits of the various industrial activities. These pressure gauges are also used in nuclear power plants, as well as in heating , ventilation or cooling systems.
Gauge pressure is different from atmospheric pressure
Atmospheric pressure is produced by the action of the weight of air on any body located on the earth’s surface. The instrument used for this measurement is the barometer and, for this reason, atmospheric and barometric pressure are equivalent concepts.
The manometer was invented in the context of the second industrial revolution of the 19th century
The first manometer in history with industrial use was invented by the French engineer Eugene Bourbon in the 19th century. For this reason, this instrument is also known as the Bourbon tube. This measuring tool was soon applied to every type of machine, for example the steam engine.
Pressure measurement required a precise device that would adapt to new industries and the automation process . At the same time, in the second industrial revolution other significant advances emerged, such as the invention of telegraphy, the discovery of electricity , the discovery of new metals such as steel and aluminum and the invention of new chemical products such as coal and tar.
These advances and new means of transport have transformed industrial processes and also modified the ways of understanding work and human relationships . In short, it can be said that the manometer is one of the “pieces” that allow us to understand the complex puzzle of the second industrial revolution.