A pressure gauge is a device used to measure the pressure of a gas or liquid. It is also known as a manometer, barometer, or vacuum gauge. Pressure gauges are used in a variety of applications, including industrial, automotive, and medical settings.
Pressure gauges measure the pressure of a gas or liquid by comparing it to a reference pressure. This reference pressure is usually atmospheric pressure, which is the pressure of the air at sea level. Pressure gauges measure the difference between the reference pressure and the pressure of the gas or liquid being measured.
Pressure gauges come in a variety of shapes and sizes, and can be used to measure different types of pressure. The most common type of pressure gauge is the Bourdon tube gauge, which is a curved tube filled with a liquid or gas. As the pressure of the gas or liquid being measured increases, the tube expands, which causes the pointer on the gauge to move.
Other types of pressure gauges include diaphragm gauges, which use a flexible diaphragm to measure pressure, and bellows gauges, which use a bellows to measure pressure. Pressure gauges can also be digital, which use electronic sensors to measure pressure.
Pressure gauges are used in a variety of applications, including industrial, automotive, and medical settings. In industrial settings, pressure gauges are used to measure the pressure of gases and liquids in pipes and tanks. In automotive settings, pressure gauges are used to measure the pressure of the air in tires. In medical settings, pressure gauges are used to measure the pressure of blood in the arteries and veins.
Pressure gauges are also used in scientific research. Scientists use pressure gauges to measure the pressure of gases and liquids in laboratory experiments. Pressure gauges are also used to measure the pressure of the atmosphere in weather balloons.
Pressure gauges are an important tool for measuring the pressure of gases and liquids. They are used in a variety of applications, from industrial and automotive settings to medical and scientific research. Pressure gauges are available in a variety of shapes and sizes, and can be used to measure different types of pressure.