Manometer

A manometer is one of the most common instruments for measuring pressure in liquids and gases. It is used in many industrial and scientific fields, including medicine, aviation, mechanical engineering and metallurgy.

The main component of a pressure gauge is a U-shaped tube filled with mercury, water or other liquid. One open end of the tube is connected to a container containing the liquid or gas whose pressure is to be measured. The other end of the tube is open and level with the free surface of the liquid being measured.

When the pressure in the container changes, the liquid in the tube moves, creating a level difference between its two ends. This change in liquid level can be measured using a graduated scale on the side of the pressure gauge. The greater the change in liquid level, the greater the pressure in the container.

Pressure gauges can be classified by the type of fluid used or by their operating principle. For example, mercury pressure gauges use mercury as the liquid, while absolute pressure gauges measure pressure relative to absolute zero.

One common use of pressure gauges is to measure blood pressure in medicine. A special type of pressure gauge called a sphygmomanometer is used for this. It is commonly used to measure blood pressure and consists of a cuff, a pump and a pressure gauge.

Overall, pressure gauges are essential tools for measuring pressure in many applications. They are available in a variety of sizes, shapes and types, allowing them to be used for a wide range of applications.

A pressure gauge is a device used to measure the pressure of a liquid or gas. It consists of a U-shaped tube filled with mercury, water or other liquid, which is open at one end and lowered into the liquid under pressure. The graduated scale allows you to easily determine the measured pressure.

To measure pressure, you need to lower the end of the tube into the liquid and observe the change in the level of liquid in the tube. The higher the pressure, the higher the liquid level. Pressure gauges can be used to measure water pressure in pipes, air pressure in compressors and other systems, and to measure gas pressure in gas cylinders.

One of the main advantages of pressure gauges is their accuracy and reliability. They provide high measurement accuracy and are not affected by external factors such as temperature or humidity. In addition, pressure gauges are affordable and easy to use.

Despite all the advantages of pressure gauges, there are some limitations. For example, they are not suitable for measuring very low or very high pressures. Also, mercury can be hazardous to health if the device is not handled correctly.

In general, pressure gauges are an important tool for measuring pressure and are widely used in various industries and sciences.