What is the unit of pressure?
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The unit of pressure in the International System of Units (SI) is the Pascal (Pa), named after French physicist Blaise Pascal. One pascal is defined as one newton of force per square meter of area (N/m²). This unit is quite small, and often pressure is reported in kilopascals (kPa), where 1 kPa = 1000 Pa.
However, in various fields and regions, other units are also used to measure pressure:
Atmospheres (atm): This unit is often used in chemistry and is based on the average atmospheric pressure at sea level. 1 atm is approximately equal to 101,325 Pa.
Bar: This is commonly used in meteorology. 1 bar is exactly equal to 100,000 Pa or 100 kPa.
Torr and millimeters of mercury (mmHg): These units are often used in medicine and many scientific fields, especially vacuum physics and engineering. Both are based on the height of a column of mercury under certain conditions. 1 Torr is approximately equal to 133.322 Pa. The relationship between torr and mmHg is 1 torr = 1 mmHg.
Pounds per square inch (psi): This unit is widely used in the United States, especially in engineering and everyday life. 1 psi is approximately equal to 6,895 Pa.
Each of these units has its own context and history of usage, but they all describe the same fundamental concept of pressure.
Below, you can find items where we try to answer the most frequently asked questions from our users. Pressure control and other systems are advancing every day and factors such as efficiency, environmental compatibility, and carbon footprint are becoming prominent.
- What is atmospheric pressure and how is it measured?
- What is the relationship between pressure and force?
- What is the unit of pressure?
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- What is hydrostatic pressure?
- How does pressure change in gases?
- How do we know how a substance behaves under pressure?
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- How does pressure affect the weather?
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- How does pressure vary between solids, liquids, and gases?
- How does pressure affect blood circulation?
- How is the air pressure in a car tire determined?
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- What is barometric pressure and what does it indicate?
- What is the relationship between pressure and density?
- Other meanings of the term pressure
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These questions often include those that many people may have in mind regarding Pressure control systems. Each user or student will have their own specific questions depending on a particular situation or application. The answers are not binding or do not express complete certainty. "There is no problem in sharing our article above by referencing it. 02/2020"
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