A manometer is a pressure gauge, "Manometer" reads extremely low pressures that are very close to atmospheric pressures, "pressure gauges" read much larger pressures.
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A pressure gauge measures pressure in a system relative to atmospheric pressure, displaying the reading in units such as psi or bar. A manometer measures pressure by balancing the weight of a liquid with the pressure being measured, often displaying pressure differentials in terms of inches or millimeters of the liquid column. In summary, a pressure gauge gives absolute pressure readings, while a manometer measures pressure differentials.
A magnehelic gauge is a specific type of pressure gauge that uses a diaphragm to measure pressure differentials, displaying the pressure on a dial using a needle. A manometer is a more general term for any device that measures pressure, typically using a column of liquid to indicate pressure levels. Manometers can come in various forms, such as U-tube and well-type manometers.
To determine the gas pressure in a closed container, you can use a pressure gauge or a manometer. These devices measure the force exerted by the gas molecules on the walls of the container, which is directly related to the gas pressure. By using the readings from the pressure gauge or manometer, you can calculate the gas pressure in the closed container.
Absolute pressure is measured relative to a perfect vacuum, while gauge pressure is measured relative to atmospheric pressure.
Gauge pressure is the pressure measured relative to atmospheric pressure, while absolute pressure is the pressure measured relative to a perfect vacuum.
Absolute pressure is the total pressure exerted by a fluid, including atmospheric pressure. Gauge pressure is the pressure measured above atmospheric pressure.